Download

Digital Multicircuit Protector
S8M
CSM_S8M_DS_E_2_3
Complete Flexible DC Circuit Protector That
Has a Wide Array of Displays, Alarm
Outputs, and Other Digital Functions.
• Four circuit protectors in one package
• Simple setting of current tripping values for each branch outputs
in 0.1-A units
• Startup and shutdown sequence control
• Display and alarm functions (Input voltage, output current,
run time, and over-temperature)
• Outputs conform to UL Class 2 (at 24 VDC, S8M-CP04-RS
only)
• DIN Rail mounting
• RoHs-compliant
• Free Support Tool available
!
For the most recent information on models that have been certified for
safety standards, refer to your OMRON website.
Refer to Safety Precautions for All Power Supplies and Safety
Precautions on page 20.
Model Number Structure
■ Model Number Legend
Note: Not all combinations are possible. Refer to List of Models in Ordering Information, below.
S8M-CP04- @@
1 2
1. Communications
None: Not supported
R:
Supported (RS-232)
2. UL Class 2 Output (at 24 VDC)
None: Not compliant
S:
Compliant
Ordering Information
■ List of Models
Note: For details on normal stock models, contact your nearest
OMRON representative.
Recommended Power Supplies
Series name
Communications
UL Class 2 output
Model number
None
Not compliant
S8M-CP04
Supported (RS-232C)
Not compliant
S8M-CP04-R
Compliant
S8M-CP04-RS
S8VS
Model number
S8VS-06024@
S8VS-09024@@
S8VS-12024@@
S8VS-18024@@
S8VS-24024@@
S8VM
S8VM-05024@@
S8VM-10024@@
S8VM-15024@@
S8VM-30024C
S8VM-60024C
Note: When selecting the power supply, be sure to include the
internal power consumption of the S8M (approx. 10 W) and not
just the power consumption of the load.
This Datasheet describes only the minimum setting operations required when using the S8M for the first time.
Refer to the S8M User's Manual (Cat. No. Z241), when making further settings.
1
S8M
Specifications
■ Ratings/Characteristics
Item
Model
Number of branches
S8M-CP04
S8M-CP04-R
I/O
Rated input voltage
24 VDC (19.2 to 26.4 VDC)
character- Allowable input current
17.0 A max.
istics
Maximum tripping output current 4.0 A
(per branch output)
16.0 A max.
3.8 A
Internal voltage drop (See note 1.) 0.5 VDC max. (at 4.0 A)
Output leakage current
Power
consumption
(See note 2.)
Functions Tripping
S8M-CP04-RS
4
0.7 VDC max. (at 3.8 A)
10 mA max.
4 branches output, 10 W max. (at 4.0 A)
normal operation
15 W max. (at 3.8 A)
4 branches output, 3 W max.
tripping operation
Abnormal voltage
tripping
28.8 V (fixed), tripping alarm output
Abnormal current
tripping
Setting range: 0.5 to 4.0 A (in 0.1-A units), tripping alarm
output
Setting range: 0.5 to 3.8 A (in 0.1-A
units), tripping alarm output
Tripping alarm out- Transistor output
put
30 VDC max., 50 mA max., leakage current: 0.1 mA max., residual voltage: 2 V max.
Alarms
Overvoltage
Setting range: 20.0 to 28.8 V (in 0.1-V units), alarm output
Undervoltage
Setting range: 18.0 to 26.4 V (in 0.1-V units), alarm output
Overcurrent
Setting range: 0.5 to 4.0 A (in 0.1-A units), alarm output
Run time
Setting range: 0.0 to 99.9 kh (in 0.1-kh units), alarm output
(The alarm output is disabled if the time is set to 0.0 kh.)
Alarm output
Transistor output
30 VDC max., 50 mA max., leakage current: 0.1 mA max., residual voltage: 2 V max.
Temperature Temperature
Display
Setting range: 0.5 to 3.8 A (in 0.1-A
units), alarm output
Setting range: 25 to 80°C, over-temperature output
Over-temperature
output
Transistor output
30 VDC max., 50 mA max., leakage current: 0.1 mA max., residual voltage: 2 V max.
Input voltage
Display range: 17.0 to 30.0 V
Display accuracy: 2% rdg ±1 digit max.
Output current
Branch output display range:
0.0 to 4.0 A
Peak output current display range:0.0 to 10.0 A
Total current display range:
0.0 to 40.0 A
Display accuracy:
5% FS (4 A) ±1 digit max.
Run time
Display range:
0.0 to 99.9 kh
Display accuracy: 2% rdg ±1 digit max.
Temperature
Display range:
−10 to 100°C
Display accuracy: 2°C ±1 digit max.
External tripping input
19.2 to 30 VDC, minimum signal width: 10 ms, tripping within 20 ms of input
Startup sequence
Can be enabled/disabled for each branch output, setting range: 0.0 to 99.9 s in 0.1-s units.
Shutdown sequence
Can be enabled/disabled for each branch output, setting range: 0.0 to 99.9 s in 0.1-s units.
Communications
None
Sampling period
1 ms
Supported (RS-232C)
2
S8M
Item
Other
Model
S8M-CP04
S8M-CP04-R
S8M-CP04-RS
Ambient operating temperature Refer to the derating curve in Engineering Data (with no condensation or icing)
Storage temperature
−25 to 65°C
Ambient operating humidity
25% to 85% (storage humidity: 25% to 90%)
Dielectric strength
1.0 kVAC for 1 min (between all charged sections and all non-charged sections; detection current: 20 mA)
500 VAC for 1 min (between all I/O and I/O signals/communications; detection current: 20 mA)
500 VAC for 1 min (between all I/O signals and communications; detection current: 20 mA)
500 VAC for 1 min (between input signals and all output signals; detection current: 20 mA)
Insulation resistance
100 MΩ min. (between all charged sections and all non-charged sections) at 500 VDC
100 MΩ min. (between all I/O and I/O signals/communications) at 500 VDC
100 MΩ min. (between all I/O signals and communications) at 500 VDC
100 MΩ min. (between input signals and all output signals) at 500 VDC
Vibration resistance
10 to 55 Hz, 0.375-mm single amplitude for 2 h each in X, Y, and Z directions
Shock resistance
150 m/s2, 3 times each in ±X, ±Y, and ±Z directions
EMI
Conforms to EN 61204-3 Class B
Conducted
Emission
Radiated Emission Conforms to EN 61204-3 Class B
EMS
Approved
standards
Weight
Conforms to EN 61204-3 High severity levels
UL:
UL 508 (Listing), UL 60950-1
cUL:
CSA C22.2 No. 107.1
cUR:
EN/VDE:
CSA No. 60950-1
EN 50178 (= VDE 0160),
EN 60950-1 (= VDE 0805 Teil 1)
KOSHA S Mark
UL 508 (Listing, Class 2: Per UL
1310), UL60950-1
CSA C22.2 No. 107.1 (Class 2: Per
No. 223)
CSA No. 60950-1
EN 50178 (= VDE 0160),
EN 60950-1 (= VDE 0805 Teil 1)
KOSHA S Mark
400 g max.
Note: 1. A voltage drop will occur in the S8M. Consider the voltage drop at the output.
2. When selecting the power supply, be sure to include the internal power consumption of the S8M (approx. 10 W) and not just the power
consumption of the load.
3
S8M
Connections
■ Block Diagrams
S8M-CP04-R/-RS only
S8M-CP04-RS only
Cutoff
circuit
Current-detection
resistor
Thermal
fuse
Current-detection
resistor
Cutoff
circuit
Fuse
+V
+V
Voltage
detection
Display
circuit
Switch
Temperature
detection
DC branch output 1
−V
Currentlimiting
circuit
DC input
power supply
Power supply
circuit
Processing
circuit
Cutoff Current-detection
circuit
resistor
Thermal
fuse
Current-detection
resistor
Cutoff
circuit
Fuse
+V
DC branch output 2
CommuniSD
cations
terminals RD
RS-232C SG
−V
Currentlimiting
circuit
Communications
circuit
Cutoff Current-detection
circuit
resistor
Tripping alarm
output
Thermal
fuse
Current-detection
resistor
Cutoff
circuit
Fuse
+V
DC branch output 3
Alarm output
−V
Currentlimiting
circuit
Overtemperature
output
Cutoff Current-detection
circuit
resistor
External
tripping input
Thermal
fuse
Current-detection
resistor
Cutoff
circuit
Fuse
+V
DC branch output 4
Currentlimiting
circuit
−V
−V
4
S8M
Construction and Nomenclature
■ Nomenclature
4 5 6 7
No.
Name
Function
1
Power Input Terminals
(+V), (−V)
Connect to the input line.
2
Branch Output
Terminals (+V), (−V)
Connect to the load lines.
Up to four branch outputs can be
connected.
3
Status Indicators
(Red, Green)
Indicate the connection and cutoff
status for each branch output.
Cut off: Red, Connected: Green (See
note 1.)
4
Tripping Alarm Output
(+, −)
Output (transistor: OFF) when the
error tripping operation functions.
(See note 2.)
5
Alarm Output (+, −)
Output (transistor: OFF) when a set
value for alarm detection is exceeded.
(See note 2.)
6
Over-temperature
Output (+, −)
Output (transistor: OFF) when a set
value for over-temperature detection
is exceeded. (See note 2.)
7
External Tripping Input
(+, −)
The tripping operation can be
executed with an external input signal.
8
Seven-segment Display Displays measured values and set
(Red)
values.
9
Unit Indicators
(Orange)
1
14
8
9
13
10
12
11
3
2
Note: The S8M-CP04-RS is shown above.
4 Tripping alarm output (TRP)
V
Lit when the input voltage is being
displayed.
A
Lit when the output current is being
displayed.
Flashes when the peak output current
is being displayed.
kh
Lit when the run time is being
displayed.
°C
Lit when the temperature is being
displayed.
s
Lit when setting the sequence time.
5 Alarm output (ALM)
6 Over-temperature output (TMP)
7 External tripping input (TRG)
1 to 4 Lit or flashes when displaying branch
output information. (See note 3.)
Internal circuit configuration
10
Mode Key
Used to change the parameter being
displayed or to reset the peak hold
current value.
11
Up Key
Used to move to different setting
modes or to increase a set value.
12
Down Key
Used to move to different setting
modes or to decrease a set value.
13
Reset Key (RST)
Used when connecting branch
outputs for tripping operation. (See
note 4.)
14
Communications
Connect to the communications lines
Terminals (RD, SD, SG) (RS-232C). (See note 5.)
Note: 1. For detailed display methods, refer to Status Indicators on
page 13.
2. Configured from independent circuits, and either sinking or
sourcing applications are possible.
3. Indicators 1 to 4 will not light except when the current is
being displayed.
4. Press for at least 3 s to enable operation.
5. Except for the S8M-CP04.
5
S8M
Engineering Data
■ Derating Curve
120
The ambient temperature that S8M can be
operating is limited by the maximum output
current of one branch terminal on ordinary
current condition.
1
100
Maximum applied current for
any one branch output (%)
Derating Curve of the S8M
S8M-CP04, S8M-CP04-R: Maximum output current 4.0 A
S8M-CP04-RS: Maximum output current 3.8 A
80
60
40
20
0
−20
−10
0
10
20
30
40
50
60 70
Ambient temperature (°C)
Note: 1. Internal parts may occasionally be deteriorated or damaged. Do not use the S8M in areas outside the derating curve (i.e., in the area
shown by shading A in the above graph).
2. If there is a derating problem, use forced air cooling.
■ Abnormal Current Tripping
Standard Detection
S8M-CP04/S8M-CP04-R
S8M-CP04-RS
Time (ms)
Time (ms)
Tripping characteristics when steady
Tripping characteristics when steady
Setting
range
Setting
range
Current limited by
internal circuit
Tripping region
Current limited by
internal circuit
Tripping region
100
100
20
20
0.5
4
6
12
0.5
Current (A)
3.8
6
12
Current (A)
Instantaneous Detection
S8M-CP04/S8M-CP04-R
S8M-CP04-RS
Time (ms)
Time (ms)
Tripping characteristics when steady
Tripping characteristics when steady
Setting
range
Setting
range
Current limited by
internal circuit
Current limited by
internal circuit
Tripping region
Tripping region
20
20
0.5
4
12
Current (A)
0.5
3.8
12
Current (A)
6
S8M
■ Mounting
Standard Mounting
Face-up Mounting
Correct
Incorrect
Note: 1. Improper mounting will interfere with heat dissipation and may occasionally result in deterioration or damage of internal parts.
Do not use any mounting method other than the standard one.
2. Take adequate measures to ensure proper heat dissipation to increase the long-term reliability of the S8M.
3. Install the S8M so that the air flow circulates around it, because the S8M is designed to radiate heat by means of natural air flow.
Functions
■ Functions
Alarm
Alarm output
Output status
Alarm display
Abnormal voltage tripping TRP output: OFF
(normally ON)
All branch outputs cut off.
A10
Abnormal current tripping TRP output: OFF
(normally ON)
Relevant branch output cut
off.
A11
Overvoltage alarm
ALM output: OFF
(normally ON)
ON
A20
Undervoltage alarm
ALM output: OFF
(normally ON)
ON
A21
Overcurrent alarm
ALM output: OFF
(normally ON)
ON
A22
Run time alarm
ALM output: OFF
(normally ON)
ON
A23
Over-temperature output TMP output: OFF
(normally ON)
ON
A30
7
S8M
■ Tripping Functions
Function
Operation
Abnormal voltage tripping The input voltage is monitored and all branch outputs are cut off if the detection voltage is reached. Notification of the
Refer to Chart 1.
status is provided using the alarm display and the tripping alarm output (TRP).
(See notes 2, 3 and 4.)
The alarm display will alternate between the voltage and the alarm code (A10). The primary voltage is measured at
the input terminals.
Detection voltage: 28.8 V (fixed)
Abnormal current tripping The output current is monitored and the branch output that is abnormal is cut off if the preset current is reached.
Refer to Chart 2.
Notification of the status is provided using the alarm display and the tripping alarm output (TRP).
(See notes 2 and 3.)
The alarm display will alternate between the current and the alarm code (A11).
Abnormal current detection setting range: 0.5 to 4.0 A (S8M-CP04-RS: 0.5 to 0.38 A) in 0.1-A units.
Either of two abnormal current tripping types can be set.
Standard detection: Tripping within 100 ms. (If a current exceeding the set value flows for 80 ms or more, it is detected
as an abnormal current and power is cut off within 20 ms.)
Instantaneous detection: Tripping within 20 ms. (If a current exceeding the set value flows for 10 ms or more, it is
detected as an abnormal current and power is cut off within 10 ms.)
(Refer to page 14 for the setting procedure.)
Tripping by external signal The output can be cut off by inputting a voltage to the external tripping input (TRG terminal). If a shutdown sequence
(See note 2.)
has been set, outputs will be cut off according to the shutdown sequence. (Refer to page 14 for information on the
shutdown sequence.)
External input signal width: 10 ms min.
External tripping enable/disable setting: Enabled
Input signal levels
High level: 19.2 to 30 VDC
Low level: 0 to 2.5 VDC
Tripping can also be performed by using communications (S8M-CP04-R/RS only).
Refer to the S8M User’s Manual (Cat. No. Z241) for information on tripping using communications.
Note: 1. Two abnormal current tripping types are supported depending on the tripping current characteristics: Standard detection and
instantaneous detection. Select the required tripping type.
2. Outputs are cut off using semiconductor relays and electrical insulation is not provided.
3. The output will remain OFF and the alarm display and alarm output will not be cleared even if power is restored. The S8M must be reset
to restore operation. (Refer to List of Alarms on page 16 for details.)
4. The voltage at the power input terminals is monitored to detect abnormal voltages. To confirm correct output voltages, measure the
voltages at the branch output terminals.
Chart 1: Operation Timing
Chart 2: Operation Timing
(Fixed)
28.8 V (Abnormal voltage tripping)
25 V (Overvoltage alarm)
(Settable)
24 V (Rated)
4.0 A
(Abnormal current tripping)
(Settable)
3.5 A
(Overcurrent alarm)
(Settable)
3.0 A
(Normal current)
18 V (Undervoltage alarm)
(Settable)
0
100 ms
100 ms
t
0
20 ms
t
100 ms
(Instantaneous)
Alarm display
A21
A20
A10
Alarm output
(See note.)
20 ms
Tripping alarm output
(See note.)
3s
Reset
Note: The alarm and tripping alarm output are both transistor outputs.
It is normally ON and turns OFF when an alarm is detected.
A22
Alarm display
Alarm output
(See note.)
Tripping alarm output
(See note.)
(Standard)
A22
A11
Within 20 ms for instantaneous
detection and 100 ms for standard
detection (depends on tripping type).
3s
Reset
Note: The alarm and tripping alarm output are both transistor outputs.
It is normally ON and turns OFF when an alarm is detected.
8
S8M
■ Alarm Functions
Function
Operation
Overvoltage alarm
(Refer to Chart 1.)
(See notes 1 and 2.)
The voltage is monitored and notification is provided using the alarm display and output (ALM) if the preset
voltage is exceeded for more than 100 ms. The alarm display will alternate between the voltage and the alarm
code (A20). The primary voltage is measured at the input terminals.
Overvoltage alarm setting range: 20.0 to 28.8 V in 0.1-V units.
(Refer to page 14 for the setting procedure.)
Overcurrent alarm
(Refer to Chart 2.)
(See note 1.)
Each branch output current is monitored and notification is provided using the alarm display and output (ALM) if
the preset value is reached.
The alarm display will alternate between the current and the alarm code (A22).
Overcurrent alarm setting range: 0.5 to 4.0 A (S8M-CP04-RS: 0.5 to 0.38 A) in 0.1-A units.
Either of two tripping types can be set.
Standard detection: An alarm is output if the current exceeds the set value for 80 ms or longer.
Instantaneous detection: An alarm is output if the current exceeds the set value for 10 ms or longer.
(Refer to page 14 for the setting procedure.)
Undervoltage alarm
(Refer to Chart 1.)
(See notes 1 and 2.)
The voltage is monitored and notification is provided using the alarm display and output (ALM) if the voltage drops
below the preset voltage for more than 80 ms. The alarm display will alternate between the voltage and the alarm
code (A21). The primary voltage is measured at the input terminals.
Undervoltage alarm setting range: 18.0 to 26.4 V in 0.1-V units.
(Refer to page 14 for the setting procedure.)
Run time alarm
(Refer to Chart 3.)
(See note 1.)
The time that the power is turned ON is calculated as the S8M run time and notification is provided using the
alarm display and output (ALM) if the preset time is reached. The alarm display will alternate between the run
time and the alarm code (A23).
Display range: 0.0 to 99.9 kh in 0.1-kh units.
Run time setting range: 0.0 to 99.9 kh in 0.1-kh units.
(Refer to page 14 for the setting procedure.)
Over-temperature output
(Refer to Chart 4.)
(See note 1.)
The internal temperature of the S8M is monitored using a built-in temperature sensor and notification is provided
using the alarm display and over-temperature output (TMP) if the preset temperature is exceeded for more than
1 s. The alarm display will alternate between the temperature and the alarm code (A30). The over-temperature
output is convenient for control operations, such as operating a cooling fan to suppress temperature increased in
the control panel.
Note: The alarm display and over-temperature output are automatically cleared if the temperature falls below the
set temperature.
Display range: −10 to 100°C in 1°C units.
Temperature setting range: 25 to 80°C in 1°C units.
(Refer to page 14 for the setting procedure.)
Note: 1. Branch outputs are not cut off for the alarm functions.
2. The voltage at the power input terminals is monitored to detect abnormal voltages. To confirm correct output voltages, measure the
voltages at the branch output terminals.
Chart 3: Operation Timing
Chart 4: Operation Timing
Temperature
Run time
50.0 kh
(Settable)
50°C
0
0
t
t
Power ON
Alarm display
(Settable)
Alarm display
A23
Alarm output
(See note.)
A30
A30
A30
Over-temperature
output (See note.)
Note: The alarm display and over-temperature output are automatically cleared (with
hysteresis). (Refer to page 16.) The over-temperature output is a transistor output.
It is normally ON and turns OFF when an alarm is detected.
Run time cleared
Note: The alarm output is a transistor output. It is normally ON and
turns OFF when an alarm is detected.
9
S8M
■ Other Functions
Function
Operation
Startup sequence
(Refer to Chart 5.)
The connection timing for branch outputs 1 to 4 can be set individually to offset the connection timing of load
devices. Creating time delays between starting loads enables safe load operation. It also reduces total inrush
current so that power supply capacity can be optimized.
Setting range: 0.0 to 99.0 s in 0.1-s units. (See note.)
(Refer to page 14 for the setting procedure.)
Shutdown sequence
(Refer to Chart 6.)
The cutoff timing for branch outputs 1 to 4 can be set individually to offset the cutoff timing of load devices for the
external tipping input or to enable an emergency stop.
Setting range: 0.0 to 99.0 s in 0.1-s units. (See note.)
(Refer to page 14 for the setting procedure.)
Startup delay
A delay function is provided so that the abnormal current tripping
function or overcurrent alarm function will not be triggered by large
initial surge currents, e.g., for capacitive loads or lamp loads. The
abnormal current tripping function will function once the set time has
elapsed.
(Note: The delay is fixed at 70 ms.)
Current
Alarm function disabled
for large surge currents
at startup.
0
t
70 ms: Delay
Note: The sequencing functions are designed for the four branch outputs of one S8M. There is no sync processing between S8M Protectors when
more than one S8M is used.
Chart 5: Operation Timing
Chart 6: Operation Timing
Power supply voltage
External tripping input
Branch output 1 voltage
Branch output 1 voltage
Startup sequence time
Branch output 2 voltage
Shutdown sequence time
Branch output 2 voltage
Startup sequence time
Branch output 3 voltage
Shutdown sequence time
Branch output 3 voltage
Startup sequence time
Branch output 4 voltage
Shutdown sequence time
Branch output 4 voltage
Startup sequence time
Self-diagnosis
(0.5 s min.)
Shutdown sequence time
Within 20 ms
Note: Tripping operation is simultaneous for tripping made for
abnormal voltages (28.8 V or higher).
10
S8M
■ Key Operations and Displays in Each Mode
Power ON
When power was turned
OFF in any mode except
Test Mode
When power was
turned OFF in
Test Mode
When power was turned
ON for the first time
Run Mode
Setting Mode
Test Mode
(See note.)
Abnormal Current
Tripping Value
Input Voltage
Display
Value Setting
Branch Output 1
No key operation for more than 3 s.
(See note.)
Abnormal Current
Tripping Type
Output Current
Display
Standard/
Instantaneous
Cut off
Connected
No key operation for more than 3 s.
Peak Output
Current Display
Total Current
Display
Clearing selected
peak output current.
Or no key operation for
more than 3 s.
Overcurrent
Alarm Value
Value Setting
Branch Output 2
No key operation for more than 3 s.
Overcurrent
Alarm Type
Standard/
Instantaneous
Cut off
Connected
No key operation for more than 3 s.
Undervoltage
Alarm Value
Run Time Display
Value Setting
No key operation for more than 3 s.
Overvoltage
Alarm Value
Temperature
Display
Branch Output 3
Value Setting
Run Time
Alarm Value
Cut off
Connected
No key operation for more than 3 s.
Value Setting
No key operation for more than 3 s.
Over-temperature
Output Value
Branch Output 4
Value Setting
No key operation for more than 3 s.
Startup Sequence
Time Setting (See note.)
Cut off
Connected
Time Setting
No key operation for more than 3 s.
Shutdown Sequence
Time Setting (See note.)
Time Setting
Cut off all branch outputs
(Shutdown Sequence)
No key operation for more than 3 s.
Press for 3 s.
Or no key operation for
more than 5 s.
Execute
Enable/Disable
Setting
External Tripping Input
Setting (See note.)
No key operation for more than 3 s.
Communications Settings
(Models with
communications only)
Connect all branch outputs
(Startup Sequence)
Settings
No key operation for more than 3 s.
Execute
Clearing
the Run Time
YES/NO
Or no key operation for
more than 3 s.
Mode Selection
Menu
Run Mode
Press for 3 s.
Setting Mode
Test Mode
Press for 3 s.
Protection Level
Press for 3 s.
Level Selection
Parameter Initialization
Press for 3 s.
Yes, initialize.
Note: Settings are displayed in order for branch outputs 1 to 4. Specific branch output settings have been omitted.
11
S8M
■ Mode Descriptions
■ Mode Selection Menu
The S8M supports a Run Mode, Setting Mode, and Test Mode.
The following modes can be selected from the Mode Selection Menu
using the Up and Down Keys.
Run Mode
Used for normal operation.
(1) Run Mode
Setting Mode Used to set or change S8M parameters.
Test Mode
In Run Mode, the current, input voltage, and other values are displayed
for the branch outputs.
Use this mode for operation once initial settings and system adjustments
have been completed.
Used to test operation for devices connected to the
S8M.
Note: Refer to the S8M User’s Manual (Cat. No. Z241), when having
further setting.
■ Initial Settings When First Using
the S8M
The following diagram illustrates mode transitions for the S8M. When
the S8M is turned ON for the first time, it will enter Setting Mode. First
set the required initial settings for the parameters in Setting Mode
and then switch to Test Mode or Run Mode.
(2) Setting Mode
Setting Mode is used to set parameters.
Operation starts from this mode when using the S8M for the first time.
(3) Test Mode
Test Mode enables forcing branch outputs ON and OFF.
Connections and cutoffs can be manipulated for all outputs for each
branch output.
By default, all outputs will be OFF.
Test Mode is thus used to turn ON branch outputs as required.
(4) Protection Level
Protection Level can be used to set restrictions for reading and writing
parameters. Three levels, levels 0, 1, and 2, are available.
The default is level 1. Refer to the S8M User's Manual (Cat. No. Z241) for
the parameters that are protected in each level.
Power ON
When power was
turned OFF in any
mode except Test
Mode
When power
was turned
OFF in Test
Mode
Mode Selection Menu
Run Mode
(5) Parameter Initialization
Parameter Initialization is used to return all parameters to their default
settings. The Parameter Initialization is not displayed in the default
protection level (level 1), and the protection level must be set to level 0 to
initialize parameters. Refer to the S8M User's Manual (Cat. No. Z241) if
initialization is required.
Run Mode run (RUN)
Press for 3 s.
Setting Mode set (SET)
Setting Mode
Test Mode tst (TST)
Test Mode
Press for 3 s.
Protection Level prt (PRT)
Press for 3 s.
Parameter Initialization ini (INI)
12
S8M
■ Run Mode
Status Indicators
Run Mode is used for normal operation. When the input power is
turned ON and the mode was Run Mode or Setting Mode the last
time the input power was turned OFF, the S8M will start in Run Mode
and connecting the branch outputs will be started. Monitoring of the
voltages, currents, run time, and temperature can be confirmed using
the Up Key and Down Key (
and
).
The status indicators light according to the branch output status as
described below.
(1) Input Voltage Display
The input voltage is monitored and displayed.
1
2
3
4
V
Lit green
Normal connection status
Flashing green Connection standby status during the startup
sequence
Lit red
Cutoff status for an abnormality
Flashing red
Cutoff status for a redundant protection circuit with
Class 2 specifications
Not lit
Forced cutoff or operation stopped
A kh °C s
(2) Output Current Display for Branch Output 1
The output current for a branch output is displayed.
1
2
3
4
V
A kh °C s
Status Indicators
(3) Peak Output Current Display for Branch Output 1
The peak output current for a branch output is
displayed.
The output currents and peak output currents for
branch outputs 2 to 4 are displayed next.
1
2
3
4
V
A kh °C s
(4) Total Current Display
The total current for all four branch outputs is
displayed.
1
2
3
4
V
Clearing the Peak Output Currents
The peak output currents can be cleared. Select the peak output
current to be cleared in Run Mode and then use the following
operation.
A kh °C s
(5) Run Time Display
The S8M run time is displayed.
1
2
3
4
V
A kh °C s
1
2
3
4
V
A kh °C s
(6) Temperature Display
Clearing completed.
The temperature inside the S8M is displayed.
1
2
3
4
V
A kh °C s
Note: 1. The S8M will start in Setting Mode when power is turned ON
for the first time after shipping from the factory.
2. Settings cannot be changed in Run Mode. Use Setting
Mode to change settings.
3. If a startup sequence has been set, connections will be
started according to the set delays.
4. When moving to Run Mode, the branch output ON/OFF
status from before entering Run Mode will be maintained.
After testing branch output operation in Test Mode, always
turn ON the branch outputs before moving to Run Mode.
5. The voltage detection function monitors the voltage at the
power input terminals. Measure the voltage at the branch
output terminals to confirm that the output voltage is correct.
Waiting display, 1 s
Peak Output Current Display
1
2
3
4
V
1
2
3
4
V
A kh °C s
2
3
4
V
A kh °C s
or
3 s with
no key operations
A kh °C s
1
After flashing
for 3 s
Set value saved (flashes for 3 s)
1
2
3
4
V
A kh °C s
Note: Indicator Status Notation
: Lit
: Flashing
13
S8M
■ Setting Mode
Setting Mode is used to set S8M parameters. Settings can be read or changed while operation continues. The various parameters can be selected
as shown below.
Abnormal Current Tripping Value
The current at which a branch output is cut off.
Setting range: 0.5 to 4.0 A (S8M-CP04-RS: 0.5 to
3.8 A) The branch output will be cut off if the value
set here is exceeded.
C-V
External Tripping Input (See note 4.)
Enable/disable the external tripping input
TRG
Abnormal Current Tripping Type
(See note 4.) Detection settings for currents to cut off branch outputs.
Repeated for each branch output.
Standard detection/instantaneous detection
C-T
Communications Settings (See note 4.)
Unit No.
Unit number setting (0 to 31)
UNO
Overcurrent Alarm Value
The current at which an alarm is output.
Setting range: 0.5 to 4.0 A (S8M-CP04-RS: 0.5 to
3.8 A)
An alarm will be output if the value set here is
exceeded.
A-V
Overcurrent Alarm Type
(See note 4.) Detection settings for currents to cut off branch outputs.
Baud Rate
Baud rate setting
48: 4,800 bps, 96: 9,600 bps
BPS
Standard detection/instantaneous detection
A-T
Bit Length
Repeated for each branch output.
Bit length setting (7 or 8)
LEN
Undervoltage Alarm Value
The detection value for a voltage drop at which an
alarm is output.
Setting range: 18.0 to 26.4 V
An alarm will be output if the voltage drops below the
value set here.
V-U
Stop Bits
Stop bit setting (1 or 2)
BIT
Overvoltage Alarm Value
The detection value for a voltage rise at which an
alarm is output.
Setting range: 20.0 to 28.8 V
An alarm will be output if the voltage rises above the
value set here.
V-O
Parity
Parity setting
non: None, evn: Even, odd: Odd
PTY
Run Time Alarm Value
The run time at which an alarm is output.
Setting range: 0.0 to 99.9 kh
An alarm will be output if the value set here is
exceeded.
The alarm will be disabled if the alarm value is set to
0.0.
TIM
Over-temperature Output
Send Wait Time
The temperature at which an signal is output.
Setting range: 25 to 80°C
An over-temperature signal will be output if the value
set here is exceeded.
TMP
Send wait time setting
0 to 999 ms
SWT
Clearing the Run Time (See note 5.)
The run time can be cleared.
CLR
Startup Sequence (See note 4.)
Enable/disable the startup sequence and set the time
for each branch output.
Time setting range: 0.0 to 99.9 s
UPS
Repeated for each branch output.
Shutdown Sequence (See note 4.)
Enable/disable the shutdown sequence and set the time
for each branch output.
Time setting range: 0.0 to 99.9 s
DWS
Repeated for each branch output.
Note: 1. Parameters cannot be changed in protection level 2.
2. The S8M will start in Setting Mode when power is turned ON for the
first time after shipping from the factory.
3. Refer to the S8M User's Manual (Cat. No. Z241), when having
further settings.
4. Not displayed in protection level 1 or 2.
5. Not displayed in protection level 2.
Clearing the Run Time
The run time can be cleared. Select the run time to be cleared in Run
Mode and then use the following operation.
Setting Parameters
Waiting display, 1 s
Clearing the Run Time
Parameters are set as shown below.
Example for Setting the Abnormal Current Tripping Value
Use
and
to change the set value.
1
2
3
4
V
A kh °C s
1
2
3
4
V
A kh °C s
1
2
3
4
V
A kh °C s
or
3 s with
no key operations
1
2
3
4
V
A kh °C s
After no key
operations for
3s
1
2
3
4
V
A kh °C s
When finished, press
to
save the set value.
Set value saved (flashes for 3 s).
After flashing
for 3 s
After flashing
for 3 s
Note: Indicator Status Notation
: Lit
: Flashing
Set value saved (flashes for 3 s)
1
2
3
4
V
A kh °C s
1
2
3
4
V
A kh °C s
14
S8M
■ Test Mode
■ Protection Level Setting
Device startup operation can be tested by turning ON/OFF branch
outputs either individually or together. The branch outputs that are to
be used are set to be connected in Test Mode. The operation to turn
all branch outputs ON/OFF together can be used to check startup
and shutdown sequences.
A protection level can be set to prevent operating errors during
normal operation. Reading or changing parameter settings and other
operations can be restricted in three levels.
1. Turning ON/OFF Individual Branch Outputs
The following display will appear when Test Mode is entered and the
Up and Down Keys (
and
) can be used to select the branch
output. Set the branch output number to be output, confirming the
number on the mode indicators, and then turn ON the output. The
ON/OFF (connected/cut off) status of the branch outputs can be
confirmed on the status indicators. An indicator will light green if the
output is connected normally.
Waiting for connection (branch output 1 is OFF)
Protection
Level
Intended for
0
Facility designers
and manufacturers
1
Facility maintenance Some settings can be read and
personnel
changed.
2
On-site operators
2
2
Settings can be read but not
changed.
Setting Protection Level
4 V A kh °C s Changes after the
Waiting for cutoff (branch output 1 is ON) waiting display.
3
1
1
All settings can be read and
changed.
Select PRT (protection level) from the Mode Selection Menu and
then perform the following procedure. (The following example shows
changing to protection level 0.)
Waiting display, 1 s (operation executed)
1
Possible operations
3
4
V
2
3
4
V
A kh °C s
Mode Selection Menu
(Protection Level)
Run Mode
A kh °C s
After no key
operations for
3s
2. Turn ON/OFF All Branch Outputs
The Up and Down Keys (
and
) can also be used to select all
branch output numbers. The ON or OFF display will appear. Use the
Mode Key to execute the operation.
1
2
3
4
V
A kh °C s
The all branch outputs will be connected if the Mode
Key (
) is pressed in this status.
Confirm that the status indicators for all branch outputs
light green.
The all branch outputs will be cut off if the Mode Key
1
2
3
4
V
A kh °C s
(
) is pressed in this status.
Confirm that the status indicators for all branch outputs
go OFF.
Set value saved
(flashes for 3 s)
■ Parameter Initialization
All S8M parameters can be restored to their default settings. Set
protection level 0 and then go to the Mode Selection Menu. INI
(parameter initialization) will be added to the menu. Select INI and
then perform the following procedure.
Mode Selection Menu
(Parameter Initialization)
Parameter Initialization
Note: Test Mode can be entered only in protection level 0 or 1.
It cannot be entered in protection level 2.
Note: Indicator Status Notation
: Lit
: Flashing
After no key
operations for
3s
Run Mode
Setting Confirmation
(Flashes for 3 s.)
Note: 1. The Mode Selection Menu is not displayed in protection
level 1 or 2. The default setting is for protection level 1.
2. Default Settings
•
•
•
•
The operating mode will change to Setting Mode.
The parameters will change to their default settings.
All branch outputs will be changed so they are not connected.
The protection level will change to level 1.
15
S8M
■ List of Alarms
Alarm
display
Name
Alarm outputs
Power
outputs
Recovery/reset method
A10
Abnormal voltage
tripping
TRP output: OFF Cut off
(normally ON)
Remove the cause of the abnormality and then press the Reset Key ( ) on the front
panel for at least 3 s or use communications reset function (S8M-CP04-R/RS only).
Power supply will be restarted after recovery.
Note: 1. Resetting will be possible from 15 s after the output is cut off.
2. Cutoff and alarm status will not be reset even if the power supply is reset.
A11
Abnormal current
tripping
TRP output: OFF Cut off
(normally ON)
Remove the cause of the abnormality and then press the Reset Key ( ) on the front
panel for at least 3 s or use communications reset function (S8M-CP04-R/RS only).
Power supply will be restarted after recovery.
Note: 1. Resetting will be possible from 15 s after the output is cut off.
2. Cutoff and alarm status will not be reset even if the power supply is reset.
A20
Overvoltage alarm ALM output: OFF ON
(normally ON)
Remove the cause of the alarm and then press the Reset Key ( ) on the front panel
for at least 3 s or use communications reset function (S8M-CP04-R/RS only). Run
Mode will be returned to after the alarm is reset.
Note: 1. Resetting will be possible if the voltage remains below the set value minus
0.3 V for at least 500 ms from 15 s after the alarm occurs.
2. The alarm status will be reset if the cause of the alarm has been removed
when the power supply is reset.
A21
Undervoltage
alarm
ALM output: OFF ON
(normally ON)
Remove the cause of the alarm and then press the Reset Key ( ) on the front panel
for at least 3 s or use communications reset function (S8M-CP04-R/RS only). Run
Mode will be returned to after the alarm is reset.
Note: 1. Resetting will be possible if the voltage remains above the set value plus
0.3 V for at least 500 ms from 15 s after the alarm occurs.
2. The alarm status will be reset if the cause of the alarm has been removed
when the power supply is reset.
A22
Overcurrent alarm ALM output: OFF ON
(normally ON)
Remove the cause of the alarm and then press the Reset Key ( ) on the front panel
for at least 3 s or use communications reset function (S8M-CP04-R/RS only). Run
Mode will be returned to after the alarm is reset.
Note: 1. Resetting will be possible if the current remains below the set value for at
least 500 ms from 15 s after the alarm occurs.
2. The alarm status will be reset if the cause of the alarm has been removed
when the power supply is reset.
A23
Run time alarm
ALM output: OFF ON
(normally ON)
Perform the run time clear operation in Setting Mode.
CLR (run time clear) will be displayed on the Setting Mode Menu and YES/NO will
be displayed when the Mode Key ( ) is pressed. The run time will be cleared if the
Mode Key ( ) is pressed again when Yes is displayed.
Note: CLR (run time clear) will not be displayed on the Setting Mode Menu in
protection level 2. Change the protection level to level 0 or 1 using the
Protection Mode Selection Menu and then clear the run time.
A30
Over-temperature
output
TMP output: OFF ON
(normally ON)
The alarm display and over-temperature output will automatically be reset if the
temperature remains below the set value minus 3°C for at least 5 s.
Note: Alarms will be displayed in order of priority if more than one alarm occurs at the same time.
Order of priority: A10, A11, A20, A21, A22, A23, A30.
16
S8M
■ Alarm Display
The S8M displays alarms according to the parameters set in Setting
Mode. The alarm number and detected value are alternated on the
display for each alarm.
Example: Abnormal Current Tripping Alarm at Branch Output 4
0.5 s
Nothing displayed
■ Communications
(S8M-CP04-R/ CP04-RS)
The built-in RS-232C port can be used to connect special Support
Tool to set parameters, monitor, perform tripping operations for
branch outputs, and perform other remote monitoring and control
operations from a network.
Type
1
2
3
4
V
A kh °C s
0.5 s
RS-232C
Communications method Half-duplex
1
2
3
4
V
A kh °C s
Sync method
Start-stop
Baud rate
4,800 or 9,600 bps
Transmitted code
ASCII
Data bit length
7 or 8 bits
Stop bit length
1 or 2 bits
Error detection
Vertical parity and BCC
Note: Alarms will be displayed in order of priority if more than one
alarm occurs at the same time.
Order of priority: A10, A11, A20, A21, A22, A23, A30.
Parity check
None, even, or odd
Protocol
CompoWay/F
■ Resetting Alarms
■ Support Tool
(S8M-CP04-R/ CP04-RS)
0.5 s
0.5 s
Current when alarm occurred
Note: Indicator Status Notation
: Lit
: Flashing
1
2
3
4
V
A kh °C s
When an alarm is displayed, remove the cause of the alarm and then
press the Reset Key (
) for at least 3 s. The following display will
appear and the alarm will be reset.
Note: The over-temperature output will automatically be reset when
the temperature drops below the set value. All other alarms
must be reset manually.
The Support Tool is used to set and monitor models that support
communications. Parameters can be set, operation can be
monitored, and parameter files can be managed.
Support Tool Functions
• Reading and writing parameter settings
To Run Mode
Run Mode is returned to automatically when the alarm is reset.
Refer to List of Alarms on page 16 for recovery/resetting
methods.
• Monitoring present values
• Monitoring status (cutoff status, normal/error status)
Applicable OS: Windows 2000 or XP
Visit OMRON's website for downloading the Support Tool.
17
S8M
Dimensions
Note: All units are in millimeters unless otherwise indicated.
75
Two, M4 screws with
square washers
115
Eight, M3.5 screws with
square washers
8.7
4.1
86.5
4.35
94
Note: The image is the S8M-CP04-RS Model.
18
S8M
■ DIN Rail (Order Separately)
Note: All units are in millimeters unless otherwise indicated.
Mounting Rail (Material: Aluminum)
PFP-100N
PFP-50N
7.3±0.15
4.5
35±0.3
15
25
10
25
25
1,000 (500)
(See note.)
10
25
27±0.15
15 (5)
(See note.)
1
Note: Values in parentheses are for the PFP-50N.
Mounting Rail (Material: Aluminum)
PFP-100N2
16
4.5
35±0.3 27
15
25
10
25
25
1,000
End Plate
PFP-M
10
25
15
24
29.2
1
1.5
10
6.2
M4 × 8
pen-head
screw
1.8
1
50
1.8
35.5 35.5
11.5
10
M4 spring washer
1.3
4.8
19
S8M
Safety Precautions
Refer to Safety Precautions for All Power Supplies.
Recommended Wire Types
!CAUTION
Terminals
Minor electric shock, fire, or Product failure may
occasionally occur. Do not disassemble, modify, or repair
the Product or touch interior of the Product.
Wiring materials
Torque
Solid,
1.08 N·m
Power input AWG14
terminals
(2.081 mm2) × 2 Stranded (9.6 in. lb.)
Strip
length
8 to 10 mm
Minor burns may occasionally occur. Do not touch the
Product while power is being supplied or immediately
after power is turned OFF.
Branch
output
terminals
AWG16 to 20
(1.309 to
0.517 mm2)
0.8 to 1.0 N·m 6 to 7 mm
(7.2 to
8.8 in. lb.)
Fire may occasionally occur. Tighten terminal screws to
the specified torque.
Power input terminals: M4 1.08 N·m (9.6 in. lb.)
Branch output terminals: M3.5 0.8 to 1.0 N·m
(7.2 to 8.8 in. lb.)
Other
terminals
AWG18 to 26
(0.823 to
0.129 mm2)
---
Do not apply more than 100-N force to the terminal block when
tightening screws.
Minor electric shock, fire, or Product failure may
occasionally occur. Do not allow any pieces of metal or
conductors or any clippings or cuttings resulting from
installation work to enter the Product.
Be sure to remove the sheet covering the S8M for machining before
power-ON so that it does not interfere with heat dissipation.
Installation Environment
The Product will be damaged. Do not incorrectly connect
the polarity of power input terminals.
Do not use the S8M in locations subject to shocks or vibrations. In
particular, install the S8M as far away as possible from contactors or
other devices that are vibration sources. Additionally, install a PFP-M
End Plate on each end of the S8M.
■ Precautions for Safe Use
Install the S8M well away from any sources of strong, high frequency
noise and surge.
Mounting
Take adequate measures to ensure proper heat dissipation to
increase the long-term reliability of the S8M. Install the S8M so that
the air flow circulates around it, because the S8M is designed to
radiate heat by means of natural air flow.
Improper mounting will interfere with heat dissipation and may
occasionally result in deterioration or damage of internal parts. Do
not use any mounting method other than a standard one.
Side-by-side mounting of two or more S8M is possible. The switch
mode power supply connected to inputs and any other sources of
heat, however, must be separated as shown below.
(See note 1.)
10 mm
(See note 2.)
Operating Life
The life of the S8M is determined by the life of the electrolytic
capacitors used inside. Here, Arrhenius Law applies, i.e., the life will
be halved for each rise of 10°C or the life will be doubled for each
drop of 10°C. The life of the S8M can thus be increased by reducing
its internal temperature.
Ambient Operating and Storage
Environment
Store the S8M at a temperature of −25 to 65°C and a humidity of
25% to 90%.
Internal parts may occasionally be deteriorated or damaged. Do not
use the S8M in areas outside the derating curve (i.e., in the area
shown by shading (
) in the derating curve diagram on
page 6).
Surrounding air temperature for UL 508 Listing and UL60950-1
Recognition is 50°C.
(See note 1.)
(See note 3.)
(See note 4.)
Note: 1. Convection of air
2. 75 mm min.
3. 75 mm min.
4. 10 mm min.
Use the S8M at a humidity of 25% to 85%.
Do not use the S8M in locations subject to direct sunlight.
Do not use the S8M in locations where liquid, foreign matter, or
corrosive gases may enter the S8M.
Input Voltage
Input voltage range: 19.2 to 26.4 VDC
Wiring
Minor electric shock during operation may occasionally occur.
Always attach the terminal cover when using the S8M.
The S8M provides abnormal voltage protection. All branch outputs
will be cut off if the input voltage exceeds 28.8 VDC. This function,
however, does not protect loads and internal parts from high voltages
in all cases. Be sure the input voltage is within the rated range.
Minor fire may possibly occur. Ensure that input and output terminals
are wired correctly.
Outputs may be cut off by the abnormal voltage protection with loads
that generate reverse peak electromotive force.
Increases in the temperature of internal parts resulting from heating
of wiring materials may result in deterioration or damage to internal
parts. Use wiring materials suitable to the current being used. The
following wiring materials, torque and strip length are recommended
to prevent heating and possible fires in wiring materials.
The S8M operates by DC input. Do not connect AC input to power
input terminals.
20
S8M
Input Power Supply Selection
Startup Delay
The overcurrent protection characteristics of the power supply
connected to the input side can cause a voltage drop, resulting in
tripping.
The startup delay will not operate when a relay or other device is
used for ON/OFF control on the output side of the S8M, so a tripping
operation may occasionally occur.
If the capacity of the input power supply is too small compared with
the load, the overcurrent protection characteristics of the power
supply can cause the failure of S8M operating or tripping by voltage
drop occasionally.
Select a Power Supply Unit with a current capacity that is 10 to 12 A
higher than the maximum current supply to the connected devices.
Connections
It is possible to connect S8M like below.
Correct
If the input power supply starts or stops too slowly, the overcurrent
protection characteristics of the power supply can cause the failure of
S8M operating or tripping by voltage drop occasionally.
+V
Power
supply
+V
+V
−V
−V
−V
+V
S8M
−V
+V
−V
+V
−V
Tripping Performance
+V
Always remove the cause of the output first and then reset the alarm
when abnormal tripping operates.
−V
+V
−V
+V
S8M
−V
When using a load with a fixed power operation, the S8M may cause
tripping when the power is turned OFF.
Internal parts may possibly be deteriorated or damaged. Do not
repeatedly perform tripping or recovery operations more than
necessary.
Tripping performance depends on the ambient operating
temperature. Use the S8M within the derating curve shown in the
derating curve diagram on page 6.
Dielectric Strength Test
The S8M is designed to withstand 500 VAC for 1 minute between I/O
terminals, all branch output terminals, all output signal terminals, the
external tripping input terminals, and all communications terminals of
the S8M.
−V
+V
+V
−V
Series connections, such as connecting an S8M to the output of
another S8M, are not possible.
Incorrect
+V
Power
supply
+V
+V
−V
−V
−V
V
+V
S8M
S8M
−V
+V
V
−V
+V
−V
The S8M may possibly be damaged from the impulse voltage if a
testing device switch is used to abruptly apply or shut off 500 VAC.
Increase the applied voltage gradually using the voltage adjustment
on the testing device.
Always short the specified terminals so that the voltage is applied to
all of the terminals at the same time.
Power input terminals and branch output terminals are not isolated.
Do not perform dielectric strength tests or other insulation appraisal
testing between inputs and outputs.
External Tripping Input
When using the external tripping input, always confirm the
application methods described in the S8M User's Manual (Cat. No.
Z241) before designing the system.
Display
The voltage detection function monitors the voltage at the power
input terminals. Measure the voltage at the branch output terminals
to confirm that the output voltage is correct.
Backup Device Connections
Observe the following precautions when using a backup device, such
as one from OMRON's S8T Series.
• When connecting a backup device to an S8M branch output, the
backup current will be supplied to other branches through internal
circuits and it is conceivable that internal parts may be deteriorated
or damaged at the same time. When using a backup device with
the S8M, connect the backup device to the power input side.
• When connecting a backup device to the S8M input side, the
backup time will be shorter than normal due to internal power
consumption. Always confirm the backup time when using a
backup device.
21
S8M
Troubleshooting
If the S8M is not operating properly, check the items listed in the following table before requesting repairs.
Stage
Observed problem
Possible cause
Remedy
Installation
The S8M was installed on a DIN Rail,
but the bottom of the Unit is not
attached.
The S8M's bottom latch is not mounted Check that the S8M has been pressed
properly.
until the bottom latch clicks.
Parameter setting
The desired alarm value is not being
displayed.
The setting is not allowed in the present Change the protection level setting.
protection level.
The set value was changed, but the
change wasn't accepted.
The new setting was not saved.
Equipment setup
After pressing the Up and Down Keys to
change the set value, press the Mode
Key and verify that the setting flashes
and the setting is saved.
When the S8M was switched to Run
The undervoltage and overvoltage
Mode after setting the overvoltage
settings may have been reversed.
alarm and undervoltage alarm, the
alarm output turned ON and cannot be
cleared.
Switch to Setting Mode and check the
settings.
The display is flashing “ON” in Test
A flashing “ON” display indicates that
Mode, but power is not being supplied the S8M is waiting to turn ON the
by the outputs.
outputs.
If the Mode Key is pressed, the output
will be connected and power will be
supplied.When power is being
supplied, “OFF” will flash on the display.
The S8M was turned OFF in Test Mode, If the power is turned OFF in Test
Either connect all branch outputs in
and there was no power from the
Mode, all of the branch outputs are cut Test Mode or connect each branch
outputs when the S8M was turned ON off for safety reasons.
output individually.
again.
When the output is connected in Test Check whether the status indicator is lit Check for problems such as output
Mode, it is cut off immediately and can't red. The current may be higher than the wiring problems.If no problems are
be connected again.
tripping current.
found, press the Reset Key for at least
3 s.
Operation
The displayed temperature is clearly
The S8M detects the Unit's internal
different from the ambient temperature. temperature, which can be 5 to 10°C
higher than the ambient temperature.
When the alarm is being used as a
control signal for a fan or cooling
equipment, set the alarm value based
on the graph in the S8M User’s Manual
(Cat. No. Z241).
An alarm was output and the cause of The S8M doesn't disregard temporary The alarm can be cleared by pressing
the alarm was eliminated, but the alarm errors, so the alarm display is retained the Reset Key for at least 3 s.
display cannot be cleared.
even after the cause of the alarm is
cleared.
The peak output current value is not
The current may have exceeded the
displayed and the display shows “- - -”. measurable range.
Clear the peak output current value in
Run Mode.
The circuit was not designed for a
The abnormal current tripping type
current that high, but the circuit is cut off (detection method) may be set to
as soon as power is supplied.
“instantaneous.” With instantaneous
detection, an abnormal current is
detected very quickly and the circuit
may be cut off due to excessive current
during equipment operation.
Either change the abnormal current
tripping type from instantaneous to
standard or raise the current tripping
value.
There may be a large number of
devices connected to the output.The
more devices that are connected, the
higher the operating current.
Branch output cut off
Maintenance
Use the S8M's startup sequence
function to spread out the connections
to the devices (delay the connection of
some devices).
The connection cannot be reset
immediately after it is cut off.
To protect the S8M's internal circuits, at If “RST” is displayed when the Reset
least 15 seconds must pass before a Key is pressed for at least 3 s, the cutcut-off output can be reset.
off output can be reset when 15 s has
passed since the output was cut off.
The output was reset, but it was
immediately cut off again.
The original cause of tripping may not
have been eliminated. After resetting
the error, a large current may have
flowed again.
The run time alarm went OFF, so the
equipment was checked and other
parts were replaced, but the alarm
could not be cleared.
The S8M continues adding to the run Clear the run time.
time. The run time must be reset to 0 in
order to clear the alarm.
Eliminate the cause of the cutoff and
press the Reset Key for at least 3 s.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
In the interest of product improvement, specifications are subject to change without notice.
22
Terms and Conditions Agreement
Read and understand this catalog.
Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you
have any questions or comments.
Warranties.
(a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship
for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron
disclaims all other warranties, express or implied.
(b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT
NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS. BUYER
ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE
PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE.
Omron further disclaims all warranties and responsibility of any type for claims or expenses based on infringement by the
Products or otherwise of any intellectual property right. (c) Buyer Remedy. Omron’s sole obligation hereunder shall be, at
Omron’s election, to (i) replace (in the form originally shipped with Buyer responsible for labor charges for removal or
replacement thereof) the non-complying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount
equal to the purchase price of the non-complying Product; provided that in no event shall Omron be responsible for warranty,
repair, indemnity or any other claims or expenses regarding the Products unless Omron’s analysis confirms that the Products
were properly handled, stored, installed and maintained and not subject to contamination, abuse, misuse or inappropriate
modification. Return of any Products by Buyer must be approved in writing by Omron before shipment. Omron Companies shall
not be liable for the suitability or unsuitability or the results from the use of Products in combination with any electrical or
electronic components, circuits, system assemblies or any other materials or substances or environments. Any advice,
recommendations or information given orally or in writing, are not to be construed as an amendment or addition to the above
warranty.
See http://www.omron.com/global/ or contact your Omron representative for published information.
Limitation on Liability; Etc.
OMRON COMPANIES SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY.
Further, in no event shall liability of Omron Companies exceed the individual price of the Product on which liability is asserted.
Suitability of Use.
Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the
combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable
third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself
is not sufficient for a complete determination of the suitability of the Product in combination with the end product, machine,
system, or other application or use. Buyer shall be solely responsible for determining appropriateness of the particular Product
with respect to Buyer’s application, product or system. Buyer shall take application responsibility in all cases.
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE
QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS,
AND THAT THE OMRON PRODUCT(S) IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE
OVERALL EQUIPMENT OR SYSTEM.
Programmable Products.
Omron Companies shall not be responsible for the user’s programming of a programmable Product, or any consequence
thereof.
Performance Data.
Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining
suitability and does not constitute a warranty. It may represent the result of Omron’s test conditions, and the user must correlate
it to actual application requirements. Actual performance is subject to the Omron’s Warranty and Limitations of Liability.
Change in Specifications.
Product specifications and accessories may be changed at any time based on improvements and other reasons. It is our
practice to change part numbers when published ratings or features are changed, or when significant construction changes are
made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers
may be assigned to fix or establish key specifications for your application. Please consult with your Omron’s representative at
any time to confirm actual specifications of purchased Product.
Errors and Omissions.
Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is
assumed for clerical, typographical or proofreading errors or omissions.
2015.2
In the interest of product improvement, specifications are subject to change without notice.
OMRON Corporation
Industrial Automation Company
http://www.ia.omron.com/
(c)Copyright OMRON Corporation 2015 All Right Reserved.
Similar pages