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Safety Relay Unit
G9SA
CSM_G9SA_DS_E_10_2
The G9SA Series Offers a Complete
Line-up of Compact Units.
• Four kinds of 45-mm wide Units are available:
A 3-pole model, a 5-pole model, and models with 3 poles
and 2 OFF-delay poles, as well as a Two-hand Controller.
Also available are 17.5-mm wide Expansion Units with 3
poles and 3 OFF-delay poles.
• Simple expansion connection.
• OFF-delay models have 15-step OFF-delay settings.
• Conforms to EN ISO13849-1 (PLe/Safety Category 4).
• Both DIN track mounting and screw mounting are possible.
.
Be sure to read the “Safety Precautions” on page 16
For the most recent information on models that have been certified for
safety standards, refer to your OMRON website.
Model Number Structure
Model Number Legend
Note: 1. Please see “Ordering Information” on page 2 for the actual models that can be ordered.
2. Specify the power supply voltage when ordering.
G9SA-@@@@@@-@@@@
1 2 3 4 5
6
1. Function
None: Emergency stop
EX:
Expansion Unit
TH:
Two-hand Controller
2. Contact Configuration (Safety Output)
0:
None
3:
3PST-NO
5:
5PST-NO
3. Contact Configuration (OFF-delay Output)
0:
None
2:
DPST-NO
3:
3PST-NO
4. Contact Configuration (Auxiliary Output)
0:
None
1:
SPST-NC
5. Input Configuration
None: 1-channel or 2-channel input possible
6. OFF-delay Time (Max. setting time)
None: No OFF-delay
T075: 7.5 seconds
T15: 15 seconds
T30: 30 seconds
1
G9SA
Ordering Information
Specify the power supply voltage when ordering.
Emergency-stop Units
Main contacts
Auxiliary contact
Number of input channels
Rated voltage
24 VAC/VDC
3PST-NO
SPST-NC
100 to 240 VAC
1 channel or 2 channels
possible
24 VAC/VDC
5PST-NO
100 to 240 VAC
Model
G9SA-301
G9SA-501
Emergency-stop OFF-delay Units
Main contacts
OFF-delay
contacts
Auxiliary
contact
Number of
input
channels
OFF-delay
time
Rated voltage
24 VAC/VDC
7.5 s
3PST-NO
DPST-NO
SPST-NC
1 channel or
2 channels
possible
100 to 240 VAC
24 VAC/VDC
15 s
100 to 240 VAC
24 VAC/VDC
30 s
100 to 240 VAC
Model
G9SA-321-T075
G9SA-321-T15
G9SA-321-T30
Note: Set to maximum values in the factory.
* The following 15-step OFF-delay time settings are available:
T075: 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, and 7.5 s
T15:1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, and 15 s
T30:2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, and 30 s
Two-hand Controller
Main contacts
Auxiliary contact
3PST-NO
Number of input channels
SPST-NC
Rated voltage
24 VAC/VDC
2 channels
100 to 240 VAC
Model
G9SA-TH301
Expansion Unit
The Expansion Unit connects to a G9SA-301, G9SA-501, G9SA-321, or G9SA-TH301.
Main contacts
Auxiliary contact
Model
3PST-NO
SPST-NC
G9SA-EX301
Expansion Units with OFF-delay Outputs
The Expansion Unit connects to a G9SA-301, G9SA-501 or G9SA-321.
Main contact form
3PST-NO
Auxiliary contact
SPST-NC
OFF-delay time
Model
7.5 s
G9SA-EX031-T075
15 s
G9SA-EX031-T15
30 s
G9SA-EX031-T30
Note: Set to maximum values in the factory.
* The following 15-step OFF-delay time settings are available:
T075: 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, and 7.5 s
T15:1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, and 15 s
T30:2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, and 30 s
2
G9SA
Specifications
Ratings
Power Input
Item
Model
G9SA-301/TH301
G9SA-501
Power supply voltage
Operating voltage range
Power consumption *
G9SA-321-T@
24 VAC/VDC:24 VAC, 50/60 Hz, or 24 VDC
100 to 240 VAC:100 to 240 VAC, 50/60 Hz
85% to 110% of rated power supply voltage
24 VAC/VDC: 1.8 VA/1.7 W max.
100 to 240 VAC: 9 VA max.
24 VAC/VDC: 2.8 VA/2.6 W max.
100 to 240 VAC: 11 VA max.
24 VAC/VDC: 3.5 VA/3.3 W max.
100 to 240 VAC: 12.5 VA max.
* When an Expansion Unit is connected, the power consumption is increased by 2 VA/2 W max.
Inputs
Item
Model
G9SA-301/321-T@/TH301
G9SA-501
40 mA max.
60 mA max.
Input current *
* When an Expansion Unit is connected, the input current is increased by 30 mA max.
Contacts
Model
G9SA-301/501/321-T@/TH301/EX301/EX031-T@
Load
Resistive load
Item
250 VAC, 5 A
30 VDC, 5 A
Rated load
Rated carry current
5A
Characteristics
Item
Model
G9SA-301/TH301
Contact resistance *1
G9SA-501/321-T@
G9SA-EX301/EX031-T@
100 mΩ
Operating time *2
30 ms max.
Response time *3
10 ms max.
Insulation resistance *4
100 MΩ min. (at 500 VDC)
Between different outputs
Dielectric
strength
Between inputs and outputs
2,500 VAC, 50/60 Hz for 1 min
Between power inputs and outputs
Between power inputs and other
inputs (only for 100 to 240-V models)
Vibration resistance
10 to 55 to 10 Hz, 0.375-mm single amplitude (0.75-mm double amplitude)
Shock
resistance
Destruction
300 m/s2
Malfunction
100 m/s2
Durability *5
Mechanical
5,000,000 operations min. (at approx. 7,200 operations/hr)
Electrical
100,000 operations min. (at approx. 1,800 operations/hr)
Failure rate (P Level) (reference value)
Ambient operating temperature
5 VDC, 1 mA
−25 to 55°C (with no icing or condensation)
Ambient operating humidity
35% to 85%
Terminal tightening torque
Weight *6
0.98 N·m
Approx. 210 g
Approx. 270 g
Approx. 130 g
*1. The contact resistance was measured with 1 A at 5 VDC using the voltage-drop method.
*2. Not Including bounce time.
*3. The response time is the time it takes for the main contact to open after the input is turned OFF. Includes bounce time.
*4. The insulation resistance was measured with 500 VDC at the same places that the dielectric strength was checked.
*5. The durability is for an ambient temperature of 15 to 35°C and an ambient humidity of 25% to 75%.
*6. Weight shown is for 24-VAC/VDC type. For 100 to 240-VAC type, add approximately 20 g.
3
G9SA
Connections
Internal Connections
G9SA-301 (24 VAC/VDC)
A1 A2
T11
T12
3
4
1
c
TH
G9SA-301 (100 to 240 VAC)
13 23 33 41
T32
T31
K1
K1 K2
K2
SA
a
b
K1
b
K2
6
PE
T23
T21
2
5
Control
circuit
A B
T22
*2
JP
1
2
3
4
5
6
Control
circuit
14 24 34 42
*2
*1
G9SA-501 (24 VAC/VDC)
A1 A2
T11
G9SA-501 (100 to 240 VAC)
T31
T12
13 23 33 43 53 61
T32
1
TH
K1
c
K2
3
4
K3
K4
SA
K4
K1
K3
b
K2
6
PE
T23
T21
a
b
2 K1
5
K2
Control
circuit
A B
T22
*2
JP
1
2
3
4
5
6
Control
circuit
14 24 34 44 54 62
*2
*1
G9SA-321-T@ (24 VAC/VDC)
A1 A2
T11
TH
K1
3
4
K3
SA
a
K1
b
13 23 33 43 53 61
T32
K3
K2
K4
Control
circuit
Off delay
timer
K4
K2
*1
G9SA-321-T@ (100 to 240 VAC)
T31
T12
c
*1
2 K1
5
K2
JP
1
2
3
4
5
6
Control
circuit
Off delay
timer
b
6
PE
T21
T23
T22
*2
A B
14 24 34 44 54 62
*1
*3
G9SA-TH301 (24 VAC/VDC)
A1 A2
T13
T11 T12
*1
*2
G9SA-TH301 (100 to 240 VAC)
13 23 33 41
T31 T32
A1 A2
T13
T11 T12
13 23 33 41
T31 T32
K1
K1
TH
3
4
SA
K2
6
PE
K2
2
5
Control circuit
1
*3
JP
K1
3
4
K2
6
PE
T23 T21 T22
K2
2
5
Control circuit
1
AC
DC
14 24 34 42
T23 T21 T22
1
2
3
4
5
6
JP
1
2
3
4
5
6
K1
14 24 34 42
G9SA-EX301
13 23 33 41
1 2
5
4
K1
1
2
3
4
5
6
K2
K1
K2
6
3
14 24 34 42
G9SA-EX031-T@
1
K2
1
2
3
4
5
6
13 23 33 41
4
2
5 K1
Off delay
timer
K2
K1
6
Note: 1. With 100 to 240-VAC type, be sure to connect PE to a protective
ground. With 24-VAC/VDC type, if the power supply is not
connected to a protective ground, be sure to connect PE to a
protective ground.
2. With 24-VAC/VDC type, the power supply terminals A1 and A2
have polarities. A2 is the negative pole.
*1. Use terminals A and B to switch reset mode.
A to B open: Manual reset
A to B closed: Auto-reset
*2. Terminal T23 is used for 2-channel input with a positive common
(when connecting a safety sensor with a PNP output).
When using T23, make sure that T21 and T22 are open.
For 1-channel input, make sure that T12 and T23 are shorted.
*3. Terminals 43-44 and terminals 53-54 are OFF-delayed outputs.
3
14 24 34 42
4
G9SA
Wiring of Inputs and Outputs
Signal name
Power supply input
Terminal name
A1, A2
Description of operation
The input terminals for power supply. Connect the power source to the A1 and A2 terminals.
DC inputs have polarity, so A1 should be connected to the positive side and A2 to the negative side.
Safety input 1
T11, T12
Safety input 2
T21, T22, T23 *1
Feedback/reset input
T31, T32
To set the safety outputs in the ON state, the ON state signal must be input to T31 - T32. Otherwise the
safety outputs cannot be in the ON state.
Instantaneous safety outputs
See below. *2
Turns ON/OFF according to the state of the safety inputs and feedback/reset inputs. During OFF-delay
state, the Instantaneous safety outputs are not able to turn ON.
OFF-delayed safety outputs
See below. *2
OFF-delayed safety outputs. The OFF-delay time is set by the OFF-delay preset switch.
Auxiliary output
See below. *2
Synchronized with Instantaneous Safety Output.
Manual/Auto selector input
A, B *3
Switch between Auto Reset and Manual Reset modes.
Ground terminal
PE
Be sure to connect the PE terminal to a protective earth for 100-240 VAC models.
Where the 24 VAC/VDC model power supply is not grounded, lease be sure to connect the PE to a
protective earth.
To set the safety outputs in the ON state, the ON state signals must be input to both safety input 1 and
safety input 2. Otherwise the safety outputs cannot be in the ON state.
*1. Terminal T23
Terminal T23 is used for 2-channel input with a positive common (when connecting a safety sensor with a PNP output). When T23 is being
used, please open T21 and T22. For 1-channel input, short circuit T12-T23 before use.
*2. Output Contacts
G9SA-301: Safety Output Contacts 13-14, 23-24, 33-34. Auxiliary Contact 41-42.
G9SA-501: Safety Output Contacts 13-14, 23-24, 33-34, 43-44, 53-54. Auxiliary Contact 61-62.
G9SA-321-T@: Safety Output Contacts 13-14, 23-24, 33-34. Safety OFF-delay Output Contact 43-44, 53-54. Auxiliary Contact 61-62.
*3. Terminals A and B
A-B Opening: Manual Reset
A-B Short Circuit: Auto Reset
5
G9SA
Dimensions and Terminal Arrangement
(Unit: mm)
G9SA-301
G9SA-501
G9SA-321-T@
G9SA-TH301
Terminal Arrangement
G9SA-301
13 23 33
91
G9SA-501
G9SA-321-T@
G9SA-TH301
41
13 23 33 43 53 61
T11 T12 T31 T32 T23 A1
T11 T12 T31 T32 T23 A1
PWR (green)
K1 (green)
PWR (green)
K1 (green)
41
T11 T12 T13 T31 T32 A1
PWR (green)
K1 (green)
K2 (green)
K3 (green)
K2 (green)
13 23 33
(See note 1.)
K2 (green)
K4 (green)
T21 T22 A B PE A2
T21 T22 A B PE A2
T21 T22 T23
PE A2
14 24 34
14 24 34 44 54 62
14 24 34
42
10.5
G9SA-301:
G9SA-501:
G9SA-321-T@:
G9SA-TH301:
5.9
4.6 dia.
7 × 5=35
42
Twenty, M3
Twenty-four, M3
Twenty-four, M3
Twenty-one, M3
Mounting Holes
Two, 4.2 dia. or M4
9
(See note 1)
76 max. 63
43
84±0.3
Connector cover *
5.6
9
35±0.3
45 max.
Note 1: The OFF-delay time setting switch is
found on the G9SA-321-T@ only.
2: The K1 to K4 indicators light when the NO contacts of
internal relays K1 to K4 close.
* Do not remove unless an Expansion Unit is being used.
R2.3
111 max.
G9SA-EX301
G9SA-EX031-T@
5
Mounting Holes
Two, 4.2 dia. or M4
Terminal Arrangement
G9SA-EX301
G9SA-EX031-T@
91
87±0.3
33 41
13 23
PWR (green)
K1 (green)
K2 (green)
10.5
14 24
Eight, M3
34 42
OFF-delay time
setting switch
(See note 1)
5.9
4.6 dia.
7
9
42
76 max. 63
Note 1: The OFF-delay time setting switch is
found on the G9SA-EX031-T@ only.
2: The K1 and K2 indicators light when
the NO contacts of internal relays K1
and K2 close.
43
OFF-delay time
setting switch
(See note 1)
5.6
13.2
5
R2.3
17.5 max.
70
111 max.
6
G9SA
Application Examples
G9SA-301 (24 VAC/VDC) with 2-channel Limit Switch Input/Auto-reset
PL/safety category
PLe/4 equivalent
Model
Stop category
Reset
0
Auto
Safety Limit Switch D4B-N/D4N/D4F
Safety Relay Unit G9SA-301 24 VAC/VDC
Note: The above PL is only the evaluation result of the example. The PL must be evaluated in an actual application by the customer after confirming the usage conditions.
●Application Overview
• The power supply to the motor M is turned OFF when the S1 and S2 detect that the guard is opened.
• The power supply to the motor M is kept OFF until the guard is closed.
Timing Chart
Limit switches
S1 and S2
K1 and K2 (NC)
Guard
K1 and K2 (NO)
Feedback loop
KM1 and KM2
(NC)
KM1 and KM2
(NO)
Open
TH
SA
Control
circuit
S1: Safety Limit Switch
with direct opening mechanism (NC)
(D4B-N, D4N, D4F)
S2: Limit switch (NO)
KM1 and KM2: Magnetic Contactor
M: 3-phase motor
7
G9SA
G9SA-301 (24 VAC/VDC) with 2-channel Limit Switch Input/Manual Reset
PL/safety category
PLe/4 equivalent
Model
Safety Limit Switch D4B-N/D4N/D4F
Safety Relay Unit G9SA-301 24 VAC/VDC
Stop category
Reset
0
Manual
Note: The above PL is only the evaluation result of the example. The PL must be evaluated in an actual application by the customer after confirming the usage conditions.
●Application Overview
• The power supply to the motor M is turned OFF when the S1 and S2 detect that the guard is opened.
• The power supply to the motor M is kept OFF until the guard is closed and the reset switch S3 is pressed.
Timing Chart
Limit switches
S1 and S2
Guard
Reset switch S3
K1 and K2 (NC)
Feedback loop
K1 and K2 (NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
Open
PLC input
PLC output
KM3
TH
SA
Control
circuit
S1: Safety Limit Switch
with direct opening mechanism (NC)
(D4B-N, D4N, D4F)
S2: Limit switch (NO)
S3: Reset switch
KM1 and KM2: Magnetic Contactor
KM3: G3J Solid-state Contactor (G3J)
M: 3-phase motor
8
G9SA
G9SA-301 (100 to 240 VAC) with 2-channel Limit Switch Input/Auto-reset
PL/safety category
PLe/4 equivalent
Model
Stop category
Reset
0
Auto
Safety Limit Switch D4B-N/D4N/D4F
Safety Relay Unit G9SA-301 100 to 240 VAC
Note: The above PL is only the evaluation result of the example. The PL must be evaluated in an actual application by the customer after confirming the usage conditions.
●Application Overview
• The power supply to the motor M is turned OFF when the S1 and S2 detect that the guard is opened.
• The power supply to the motor M is kept OFF until the guard is closed.
Timing Chart
Guard
Feedback loop
Limit switches
S1 and S2
K1 and K2
(NC)
K1 and K2
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
Open
S1:
AC
DC
Control
circuit
S2:
KM1 and KM2:
M:
Safety Limit Switch
with direct opening mechanism (NC)
(D4B-N, D4N, D4F)
Limit switch (NO)
Magnetic Contactor
3-phase motor
9
G9SA
G9SA-301 (24 VAC/VDC) with 2-channel Emergency Stop Switch Input/Manual Reset
PL/safety category
PLe/4 equivalent
Model
Stop category
Reset
0
Manual
Emergency Stop Switch A165E/A22E
Safety Relay Unit G9SA-301 24 VAC/VDC
Note: The above PL is only the evaluation result of the example. The PL must be evaluated in an actual application by the customer after confirming the usage conditions.
●Application Overview
• The power supply to the motor M is turned OFF when the emergency stop switch is pressed.
• The power supply to the motor M is kept OFF until the reset switch S2 is pressed while the emergency stop switch is released.
Timing Chart
Feedback loop
Emergency
stop switch S1
Reset switch
S2
K1 and K2
(NC)
K1 and K2
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
PLC input
PLC output
KM3
TH
SA
Control
circuit
S1:
Emergency stop switch
with direct opening mechanism
(A165E or A22E)
S2:
Reset switch
KM1 and KM2: Magnetic Contactor
KM3:
G3J Solid-state Contactor (G3J)
M:
3-phase motor
10
G9SA
G9SA-321-T@ (24 VAC/VDC) with 2-channel Limit Switch Input/Manual Reset
PL/safety category
PLd/3 equivalent
Model
Safety Limit Switch D4B-N/D4N/D4F
Safety Relay Unit G9SA-321-T@ 24 VAC/VDC
Stop category
Reset
1
Manual
Note: The above PL is only the evaluation result of the example. The PL must be evaluated in an actual application by the customer after confirming the usage conditions.
●Application Overview
• Stop signal is sent to the motor controller to decelerate the motor M when the S1 and S2 detect that the guard is opened.
• The power supply to the motor M is turned OFF after OFF-delay time.
• The power supply to the motor M is kept OFF until the guard is closed and the reset switch S3 is pressed.
Guard
Feedback loop
Open
TH
SA
Off delay
timer
S1:
Safety Limit Switch
with direct opening mechanism (NC)
(D4B-N, D4N, D4F)
S2:
Limit switch (NO)
S3:
Reset switch
KM1 and KM2: Magnetic Contactor
M:
3-phase motor
Control
circuit
Operation
instruction
Motor controller
Timing Chart
Limit switches
S1 and S2
Reset switch
S3
K1 and K2
(NC)
K1 and K2
(NO)
K3 and K4
(NC)
K3 and K4
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
Operation
instruction
Motor rotation
OFF-delay time
11
G9SA
G9SA-321-T@ (24 VAC/VDC) + G9SA-EX031-T@ with 2-channel Limit Switch Input/Manual Reset
PL/safety category
PLd/3 equivalent
Model
Stop category
Reset
1
Manual
Safety Limit Switch D4B-N/D4N/D4F
Safety Relay Unit G9SA-321-T@ 24 VAC/VDC + G9SA-EX031-T@
Note: The above PL is only the evaluation result of the example. The PL must be evaluated in an actual application by the customer after confirming the usage conditions.
●Application Overview
• Stop signal is sent to the motor controller to decelerate the motor M1 and M2 when the S1 and S2 detect that the guard is opened.
• The power supply to the motor M1 and M2 is turned OFF after OFF-delay time.
• The power supply to the motor M1 and M2 is kept OFF until the guard is closed and the reset switch S3 is pressed.
Guard
Feedback loop
Open
TH
SA
Off delay
timer
Off delay
timer
Control
circuit
Operation
instruction
Timing Chart
Motor controller
Limit switches
S1 and S2
Reset switch
S3
G9SA-321-T@
K1 and K2 (NC)
G9SA-321-T@
K1 and K2 (NO)
G9SA-321-T@
K3 and K4 (NC)
G9SA-321-T@
K3 and K4 (NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
Operation
instruction
Motor M1
rotation
G9SA-EX031
K1 and K2 (NC)
G9SA-EX-031
K1 and K2 (NO)
Operation
instruction
S1:
OFF-delay time 1
Motor controller
Safety Limit Switch
with direct opening mechanism (NC)
(D4B-N, D4N, D4F)
Limit switch (NO)
Reset switch
S2:
S3:
KM1, KM2,
KM3, and KM4: Magnetic Contactor
M1, M2:
3-phase motor
KM3 and KM4
(NC)
KM3 and KM4
(NO)
Operation
instruction
Motor M2
rotation
OFF-delay time 2
12
G9SA
G9SA-301 (24 VAC/VDC) with 2-channel Safety Sensor/Manual Reset (PNP models only)
PL/safety category
Model
Safety Light Curtain F3SJ-A@@@@P@@
Safety Relay Unit G9SA-301 24 VAC/VDC
PLe/4 equivalent
Stop category
Reset
0
Manual
Note: The above PL is only the evaluation result of the example. The PL must be evaluated in an actual application by the customer after confirming the usage conditions.
●Application Overview
• The power supply to the motor M is turned OFF when the beam is blocked.
• The power supply to the motor M is kept OFF until the beam is unblocked and the reset switch S1 is pressed.
Emitter
Receiver
− F3SJ settings
• Auto reset mode
• Not using external device monitoring
− G9SA-301 settings
• Manual reset mode
• Using feedback loop
F3SJ-A
Shield
0V (Blue)
OSSD2 (White)
*
OSSD1 (Green)
Auxiliary (Yellow)
+24V (Brown)
Open
+24V (Brown)
EDM input (Red)
RS-485(B) (Pink)
Interlock selection
input (White)
Reset input (Yellow)
(Red)
Open
0V (Blue)
Shield
Test input (Green)
RS-485(A) (Gray)
Feedback loop
KM3
E1
TH
SA
Control
circuit
* The F3SJ-A auxiliary output wiring is shown for dark-ON operation.
Timing Chart
F3SJ-A: Unblocked
Blocked
Reset switch S1
K1 and K2
(NC)
K1 and K2
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
PLC input
PLC output
KM3
F3SJ-A:
S1:
KM1 and KM2:
KM3:
M:
E1:
Safety sensor
Reset switch
Magnetic Contactor
G3J Solid-state Contactor (G3J)
3-phase motor
24-VDC Power Supply (S82K)
13
G9SA
G9SA-TH301 (24 VAC/VDC) with 2-hand Inputs
PL/safety category
PLe/4 equivalent
Model
Stop category
Reset
0
−
Safety Relay Unit G9SA-TH301 24 VAC/VDC
Note: The above PL is only the evaluation result of the example. The PL must be evaluated in an actual application by the customer after confirming the usage conditions.
●Application Overview
• The motor M is turned ON when the two-hand pushbutton switch S11 and S12 are pressed simultaneously.
• The motor M is turned OFF when one of the two-hand pushbutton switches is released.
Timing Chart
S11 (NC)
S11 (NO)
S12 (NC)
Feedback loop
S12 (NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
0.5 s max.
Input time difference operates only
when the difference is 0.5 s max.
S11, S12:
Two-hand pushbutton switches
KM1 and KM2: Magnetic Contactor
TH
SA
Control circuit
C
D
Note: Use a 1NC+1NO switch for S11 and S12.
14
G9SA
G9SA-501 (24 VAC/VDC) and G9SA-EX301 with 2-channel Limit Switch Input/Manual Reset
PL/safety category
Model
Safety Limit Switch D4B-N/D4N/D4F
Safety Relay Unit G9SA-501 24 VAC/VDC + G9SA-EX301
PLe/4 equivalent
Stop category
Reset
0
Manual
Note: The above PL is only the evaluation result of the example. The PL must be evaluated in an actual application by the customer after confirming the usage conditions.
●Application Overview
• The power supply to the motor M is turned OFF when the S1 and S2 detect that the guard is opened.
• The power supply to the motor M is kept OFF until the guard is closed and the reset switch S3 is pressed.
Feedback loop
Open
TH
SA
Control
circuit
S1:
Safety Limit Switch
with direct opening mechanism (NC)
(D4B-N, D4N, D4F)
S2:
Limit switch (NO)
S3:
Reset switch
KM1 and KM2: Magnetic Contactor
M:
3-phase motor
Timing Chart
Limit switches S1
and S2
Reset switch
S3
G9SA-501
K1, K2, K3 and
K4 (NC)
G9SA-501
K1, K2, K3, and
K4 (NO)
G9SA-EX301
K1 and K2 (NC)
G9SA-EX301
K1 and K2 (NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
15
G9SA
Safety Precautions
Be sure to read the precautions “Precautions for All Relays” and “Precautions for All Relays with Forcibly
Guided Contacts” in the website at:http://www.ia.omron.com/.
!CAUTION
Turn OFF the G9SA before wiring the G9SA. Do not
touch the terminals of the G9SA while the power is
turned ON, because the terminals are charged and may
cause an electric shock.
Connecting Inputs
If using multiple G9SA models, inputs cannot be made using the
same switch. This is also true for other input terminals.
Incorrect
Precautions for Correct Use
Failure Detection for Slow-starting Power Supply
When using a power supply with a long start-up time, if power is
switched on while input has been closed the internal circuits will
detect a power voltage error and the product will not operate. Apply
the voltage to the product once the voltage has reached its rated level.
Installation
The G9SA can be installed in any direction.
Wiring
• Use the following to wire the G9SA.
Stranded wire: 0.75 to 1.5 mm2
Solid wire:
1.0 to 1.5 mm2
• Tighten each screw to a torque of 0.78 to 1.18 N·m, or the G9SA
may malfunction or generate heat.
• External inputs connected to T11 and T12 or T21 and T22 must be
no-voltage contact inputs.
• PE is a ground terminal.
When a machine is grounded at the positive, the PE terminal
should not be grounded.
Connector Cover
Do not remove the connector cover of the G9SA-301, G9SA-501,
G9SA-321-T@, or G9SA-TH301 unless an Expansion Unit is being
used.
Mounting Expansion Units
• Turn OFF the G9SA before connecting the Expansion Unit.
• When an Expansion Unit is being used, remove the connector
cover from the G9SA Safety Relay Unit (G9SA-301, G9SA-501,
G9SA-321-T@, or G9SA-TH301) and insert the connector of the
Expansion Unit’s connector cable.
Mounting Multiple Units
When mounting multiple Units close to each other, the rated
current will be 3 A. Do not apply a current higher than 3 A.
Applicable Performance Level (PL)
(EN ISO13849-1)
G9SA-series Relays meet the requirements of PLe/Safety Category
4 of the EN ISO13849-1 standards when they are used as shown in
the examples provided by OMRON. The Relays may not meet the
standards in some operating conditions. The OFF-delay output of
models G9SA-321-T@ and EX031-T@, however, conform to PLd/
Safety Category 3.
The applicable performance level is determined from the whole safety
control system. Make sure that the whole safety control system meets
EN ISO13849-1 requirements.
T11 T12
T11 T12
G9SA
G9SA
Ground Shorts
The G9SA internal circuits have a positive thermistor (TH) built in,
which will detect ground short malfunctions (where S1 and S2 are
grounded) and 1-channel and 2-channel short malfunctions, and cut
off the safety output. If the short breakdown is repaired, the G9SA
automatically recovers.
Resetting Inputs
When only channel 1 of the 2-channel input turns OFF, the safety
output is interrupted. In order to restart when this happens, it is
necessary to turn OFF and ON both input channels. It is not
possible to restart by resetting only channel 1.
Resetting Inputs During OFF Delay Time
The G9SA-321-T@ operates as follows according to the reset mode
when the inputs are to be re-entered during the OFF delay time of the
G9SA-321-T@:
For auto reset, after the OFF delay time has ended, the outputs will
turn OFF, and then the outputs will turn ON again.
For manual reset, after the OFF delay time has ended, the outputs will
turn OFF, and then the outputs will turn ON again when the reset is
input.
Durability of Contact Outputs
Relay with Forcibly Guided Contact durability depends greatly on the
switching condition. Confirm the actual conditions of operation in
which the Relay will be used in order to make sure the permissible
number of switching operations.
When the accumulated number of operation exceeds its permissible
range, it can cause failure of reset of safety control circuit. In such
case, please replace the Relay immediately. If the Relay is used
continuously without replacing, then it can lead to loss of safety
function.
Certified Standards
The G9SA-301/501/321-T@/TH301/EX301/EX031-T@ conform to the
following standards.
• EN standards, certified by DGUV:
EN60947-5-1
EN ISO13849-1: 2008
EN ISO13849-2
GS-ET-20
EN574 (G9SA-TH301 only)
• UL standards: UL508 (Industrial Control Equipment)
• CSA standards: CSA C22.2 No. 14 (Industrial Control Equipment)
• CCC Certification: GB14048.5
16
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.
2015.7
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.
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