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Three-phase Asymmetry and Phase-sequence Phase-loss Relay
K8AK-PA
Ideal for 3-phase Voltage Asymmetry
Monitoring for Industrial Facilities
and Equipment.
• Greater resistance to inverter noise.
• Monitor voltage asymmetry, phase sequence, and phase
loss for three-phase 3-wire or 4-wire power supplies with
just one Unit.
Switch setting for 3-phase 3-wire or 3-phase 4-wire power
supply.
• One SPDT output relay, 5 A at 250 VAC (resistive load).
• World-wide power specifications supported by one Unit
(switchable).
• Relay status can be monitored using LED indicator.
For the most recent information on models that have been certified for
safety standards, refer to your OMRON website.
Refer to Safety Precautions on page 9.
Refer to page 8 for commonly asked questions.
Ordering Information
List of Models
Rated input*
Model
3-phase 3-wire mode
200, 220, 230, 240 VAC
3-phase 4-wire mode
115, 127, 133, 138 VAC
K8AK-PA1
3-phase 3-wire mode
380, 400, 415, 480 VAC
K8AK-PA2
3-phase 4-wire mode
220, 230, 240, 277 VAC
Note: Three-phase, three-wire or four-wire and the input range are switched using a DIP switch.
* The power supply voltage is the same as the rated input voltage.
Single K8AK Monitors 3-phase Power Supply with 3 or 4 Wires
Monitoring Relays can be used to monitor 3-phase power supplies with 3 or 4 wires simply by changing DIP switch settings.
Phase to phase voltage (3 wires)
L1
L2
L3
Phase to neutral voltage (4 wires)
L1
L2
L3
N
230VAC
400VAC
230VAC
400VAC
400VAC
230VAC
A Single K8AK Can Monitor a 3-phase Power Supply Anywhere in the World
Reduces Maintenance Parts Inventory
K8AK-PA1
K8AK-PA2
SW2
SW2
SW3
ON
OFF
ON
SW4
ON
ON
OFF
ON
P-N
OFF
ON
OFF
OFF
OFF
138 V
133 V
127 V
115 V
P-P
240V
230 V
220 V
200 V
P-N
277 V
240 V
230 V
220 V
P-P
480 V
415 V
400 V
380 V
1
K8AK-PA
Ratings and Specifications
Ratings
Rated input voltage
K8AK-PA1
Three-phase, three-wire Mode: 200, 220, 230 and 240 VAC
Three-phase, four-wire Mode: 115, 127, 133 and 138 VAC
K8AK-PA2
Three-phase, three-wire Mode: 380, 400, 415 and 480 VAC
Three-phase, four-wire Mode: 220, 230, 240 and 277 VAC
Input load
K8AK-PA1: Approx. 4.4 VA
K8AK-PA2: Approx. 4.4 VA
Operating value setting range (ASY.)
Asymmetry set value: 2% to 22%
Operating value
Asymmetry operating value = Rated input voltage × Asymmetry set value (%)
The asymmetry operation will function when the potential difference between the highest and lowest voltage
phases equals or exceeds the asymmetry operating value.
Reset value setting range (HYS.)
5% of operating value (fixed)
Reset method
Automatic reset
Asymmetry
Operating time
Phase sequence
setting range (T)
Phase loss
2
0.1 to 30 s
0.1 s±0.05 s
0.1 s max.
Power ON lock time (LOCK)
1 s/5 s (Changed with the DIP switch.)
Indicators
Power (PWR): Green, Relay output (RY): Yellow, Alarm outputs (ALM): Red
Output relays
One SPDT relay (NC operation)
Output relay ratings
Rated load
Resistive load
5 A at 250 VAC
5 A at 30 VDC
Maximum switching capacity: 1,250 VA, 150 W
Minimum load: 5 VDC, 10 mA (reference values)
Mechanical life: 10 million operations min.
Electrical life: 5 A at 250 VAC or 30 VDC: 50,000 operations
3 A at 250 VAC/30 VDC: 100,000 operations
Ambient operating temperature
−20 to 60°C (with no condensation or icing)
Storage temperature
−25 to 65°C (with no condensation or icing)
Ambient operating humidity
25% to 85% (with no condensation)
Storage humidity
25% to 85% (with no condensation)
Altitude
2,000 m max.
Terminal screw tightening torque
0.49 to 0.59 N·m
Terminal wiring method
Recommended wire
Solid wire:
2.5 mm2
Twisted wires: AWG16, AWG18
Note: 1. Ferrules with insulating sleeves must be used with twisted wires.
2. Two wires can be twisted together.
Recommended ferrules
Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact
Al 1-8RD (for AWG18) manufactured by Phoenix Contact
Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color
N1.5
Case material
PC and ABS, UL 94 V-0
Weight
Approx. 130 g
Mounting
Mounts to DIN Track.
Dimensions
22.5 × 90 × 100 mm (W×H×D)
K8AK-PA
Specifications
Input frequency
50/60 Hz
Overload capacity
Repeat accuracy
Applicable standards
Continuous input at 115% of maximum input, 10 s at 125% (up to 600 VAC).
Operating value
±0.5% full scale (at 25°C and 65% humidity, rated power supply voltage, 50/60 Hz sine wave input)
Operating time
±50 ms (at 25°C and 65% humidity, rated power supply voltage)
Conforming standards
EN 60947-5-1
Installation environment (pollution level 2, installation category III)
EMC
EN 60947-5-1
Safety standards
UL 508 (Recognition), Korean Radio Waves Act (Act 10564),
CSA: C22.2 No.14, CCC: GB14048.5
Insulation resistance
20 MΩ min.
Between external terminals and case
Between input terminals and output terminals
Dielectric strength
2,000 VAC for one minute
Between external terminals and case
Between input terminals and output terminals
Noise immunity
1,500 V power supply terminal common/normal mode
Square-wave noise of ±1 µs/100 ns pulse width with 1-ns rise time
Vibration resistance
Frequency: 10 to 55 Hz, acceleration 50 m/s2
10 sweeps of 5 min each in X,Y, and Z directions
Shock resistance
100 m/s2, 3 times each in 6 directions along 3 axes
Degree of protection
Terminals: IP20
●Relationship of Mounting Distance between K8AK-PA Relays
and Ambient Temperature (Reference Values)
The following diagram shows the relationship between the mounting distances and the
ambient temperature.
If the relay is used with an ambient temperature that exceeds these values, the
temperature of the K8AK may rise and shorten the life of the internal components.
Ambient temperature [°C]
60
50
40
30
20
10
0
5
10
15
Distance between products d [mm]
Test method
Sample: K8AK-PA
Mounting distances: 0, 5, and 10 mm min.
K8AK
K8AK
K8AK
K8AK
K8AK
No.1
No.2
No.3
No.4
No.5
DIN Track
Distance between products: d
3
K8AK-PA
Connections
Terminal Diagram
Control Output
Relay output
250 VAC, 5 A (resistive load)
30 VDC, 5 A (resistive load)
Input Voltages
L2
L1
L3
L1
L2
L3
3-phase,
3-wire
power
supply
Relay Output
11
12
14
_
_
Monitoring 3-phase,
3-wire Power Supply
N
_
_
11
12
14
L2
L3
N
_
_
3-phase,
4-wire
power
supply
or
N
L1
Monitoring 3-phase,
4-wire Power Supply
Note: 1. Do not connect anything to terminals that are shaded in gray.
2. Use the recommended ferrules if you use twisted wires.
Wiring Example
L1
3-phase
voltage
L2
Motor
L3
N
L1
L2
L3
Power supply
AC/DC
N
_
_
11
12
14
Timing Charts
●Voltage Asymmetry and Phase Sequence/Phase Loss Operation Diagram
L1
Input L2
Asymmetry operation voltage (set value)
Operation Indicators
Item
L3
Ry
indicator
Flashing
Lit
Alarm indicator
Relay
t
t1: Power ON lock (1 s or 5 s)
Phase sequence operation
L2
L1
L3
L1
L3
L2
L2
L3
L2
L1
L3
OFF
ON
OFF
OFF
ON*1
OFF
Phase
Incorrect
sequence phase
OFF
Flashing*2
OFF
ON
OFF
ON
Correct
phase
Input L2
L3
Flashing Flashing Flashing
Alarm indicator
Relay 11-14
Note: 1. K8AK-PA@ output relay is normally operative.
2. The power ON lock prevents unnecessary alarms from being generated during
the instable period when the power is first turned on. There is no relay output
during timer operation.
3. Phase loss is detected by L1, L2, and L3 voltage drops.
A phase loss will exist if any of the phases drops below 60% of the rated input.
4. L1 and L2 function both as the power supply terminals and as input terminals.
If the voltage drops dramatically, then the Relay will not operate due to an
undervoltage.
5. Motor load phase loss cannot be detected during operation.
6. Phase loss is detected based on voltage, so phase loss cannot be detected on
the load side.
Calculating the Asymmetry Operating Voltage
Asymmetry operation condition = (Highest voltage − Lowest voltage) > Asymmetry operating voltage
Asymmetry operating voltage = Rated input voltage (V) × Asymmetry set value (%)
Note: The rated input voltage is selected and set with the DIP switch.
4
Alarm relay
Phase loss
L1
L1
Alarm
indicator
Contact
operation
Asymmetry
t: Operating time (0.1 to 30 s)
t1
Phase loss operation
Display
*1 L1 and L2 are also used for the power supply. If the voltage
becomes very low, the indicator will turn OFF.
*2
The indicator will flash once per second after an incorrect phase is detected
and once per 0.5 second during the detection time.
K8AK-PA
Nomenclature
●Indicators
Front
Item
Terminal block
(See notes 1 and 2.)
Asymmetry rate knob
(ASY.)
Meaning
Power indicator
(PWR: Green)
Lit when power is being supplied*
Relay status
indicator
(RY: Yellow)
Lit when relay is operating (normally lit).
Alarm indicator
(ALM: Red)
Asymmetry voltage error indicator
The indicator flashes to indicate the error status after
the input has exceeded the set value while the operating time is being clocked.
Power indicator
* The input across L1 and L2 is used for the internal power supply.
Therefore, the power indicator will not be lit if there is no input
across L1 and L2.
Relay status indicator
Alarm indicator
Operating time knob (T)
●Setting Knobs
Item
Terminal block
(See notes 1 and 2.)
Usage
Asymmetry rate knob
(ASY.)
Used to set the asymmetry rate to 2% to 22%.
Operating time knob (T)
Used to set the operating time to 0.1 to 30 s.
Note: 1. Use either a solid wire of 2.5 mm2 maximum or a ferrule with
insulating sleeve for the terminal connection.
The length of the exposed current-carrying part inserted into
the terminal must be 8 mm or less to maintain dielectric
strength after connection.
For 2.5 mm2 or
smaller solid wires
8 mm max.
For ferrules with
an insulation sleeve.
8 mm max.
Recommended ferrules
Phoenix Contact
• Al 1,5-8BK (for AWG16)
• Al 1-8RD (for AWG18)
• Al 0,75-8GY (for AWG18)
2. Screw tightening torque: 0.49 to 0.59 N·m
5
K8AK-PA
Operation Methods
Connections
●Input
N L1 L2 L3
Connect to L1, L2, and L3 (for three-phase three-wire mode) or L1, L2, L3, and N (for three-phase four-wire
mode), depending on the mode selected using pin 2 on the DIP switch.
The Unit will not operate correctly if the DIP switch setting and the wiring do not agree.
Make sure the phase sequence is wired correctly. The Unit will not operate normally if the phase sequence
is incorrect.
Voltage input
L1
L2
N
L3
●Outputs
14
Signal output
12
Terminals 11, 12, and 14 are output terminals for SPDT.
* Use the recommended ferrules if you use twisted wires.
11
Relay signal
output
Load
DIP Switch Settings
l
The power ON lock time, number of wires, and rated voltage are set using the DIP switch located on the bottom of the Unit.
●DIP Switch Functions
K8AK-PA1
OFF
Pin
OFF ● ↑
ON
ON ❍ ↓
SW4
SW3
SW2
SW1
DIP switch pins
OFF
1
2
3
4
ON
Power ON lock
time
1s
●
---
---
---
5s
❍
---
---
---
Number of wires
3-wire 3-phase
---
●
---
---
4-wire 3-phase
---
❍
---
---
Rated voltage
3-wire 3phase
4-wire 3phase
200 V
115 V
---
---
●
●
220 V
127 V
---
---
❍
●
230 V
133 V
---
---
●
❍
240 V
138 V
---
---
❍
❍
2
3
4
Note: All pins are set to OFF at the factory.
K8AK-PA2
Pin
OFF ● ↑
ON ❍ ↓
1
ON
Power ON lock
time
1s
●
---
---
---
5s
❍
---
---
---
Number of wires
3-wire 3-phase
---
●
---
---
4-wire 3-phase
---
❍
---
---
●
Rated voltage
3-wire 3phase
4-wire 3phase
380 V
220 V
---
---
●
400 V
230 V
---
---
❍
●
415 V
240 V
---
---
●
❍
480 V
277 V
---
---
❍
❍
Note: All pins are set to OFF at the factory.
6
OFF
K8AK-PA
Setting Method
●Asymmetry
The asymmetry rate is set using the asymmetry rate knob (ASY.)
The setting range is 2% to 22% of the rated input.
Turn the knob while there is an input to the input terminals until the alarm indicator flashes (when the set value and the input have reached the
same level.)
Use this as a guide to make the setting.
The rated input depends on the model and DIP switch setting.
Example: K8AK-PA1 with Pin 2 Turned OFF (Three-phase, Three-wire Mode) and Pins 3 and 4 Turned OFF (Rated Voltage of 200 V)
The rated input voltage is 200 VAC and the setting range is 4 to 44 V.
If the setting (ASY. knob) is at 10%, the asymmetry operation voltage is 20 V and an alarm will be output if the difference between
the minimum and maximum phases for two of the three phases exceeds 20 V.
●Operating Time
The operating time is set using the operating time knob (T).
The operating time can be set to between 0.1 and 30 s.
Turn the knob while there is an input to the input terminals until the alarm indicator flashes (when the set value and the input have reached the
same level.)
Use this as a guide to set the operating time.
If the input exceeds the asymmetry set value, the alarm indicator will start flashing for the set period and then stay lit.
Dimensions
(Unit: mm)
Three-phase Asymmetry and Phase-sequence Phase-loss Relays
K8AK-PA1
K8AK-PA2
22.5
100
90
72
5
Optional Parts for DIN Track Mounting
●DIN Tracks
PFP-100N
PFP-50N
7.3±0.15
4.5
35±0.3
15
25
10
25
25
1,000 (500)*
10
25
15 (5)*
27±0.15
1
*Dimensions in parentheses are for the PFP-50N.
7
K8AK-PA
Questions and Answers
Q
Q
Checking Operation
With the rated input voltage applied, gradually change the
voltage to any one phase. The Unit will operate when the
difference between the maximum and minimum voltage
phases reaches or exceeds the asymmetry operating value.
Asymmetry operating value = Rated input voltage ×
Asymmetry set value (%)
Example: For monitoring mode set to three-phase three-wire
monitoring, a rated voltage of 200 V, and an operating time
of 5 s.
Note: K8AK-PA@ output relays are normally operative.
L1
Flashing
Lit
Alarm indicator
Q
T T: Operating time (0.1 to 30 s)
T1: Power ON lock time (1 s or 5 s)
Connection Diagram 1
L1
V1
L2
3φ
200 VAC
V2 V3
L1
0 to 150 V
L2
L3
Three-phase variable
autotransformer
How to Measure the Operating Time
Operating Time
Adjust the slide resistor so that the voltage difference applied
to the K8AK terminals is equal to or greater than the
asymmetry operating value when the auxiliary relay operates,
as shown in connection diagram 2. Close the switch and use
the cycle counter to measure the operating time.
Load-side Phase Loss
In principle, phase loss cannot be detected on the load side
because the K8AK-PA@ measures three-phase voltage to
determine phase loss.
Q
Contact
Q
Phase Sequence Operation
Switch the wiring, as shown by the dotted lines in connection
diagram 1, to reverse the phase sequence and check that the
K8AK operates.
Phase Loss Operation
Create a phase loss for any input phase and check that the
K8AK operates.
Asymmetry operating voltage (set value)
Inputs L2
L3
Checking the Phase Sequence and Phase Loss Operation
Motor Load Phase Loss during Operation
Phase loss cannot be detected for motor loads during
operation. Use the asymmetry detection function.
Normally, three-phase motors will continue to rotate even if
one phase is open. The three-phase voltage will be induced
at the motor terminals. The diagram shows voltage induction
at the motor terminals when phase R is lost with a load
applied to a three-phase motor. The horizontal axis shows the
motor load as a percentage of the rated load, and the vertical
axis shows voltage as a percentage of the rated voltage. The
lines in the graph show the voltage induced at the motor
terminals for each load when phase loss occurs during
operation. As the graph shows, phase loss cannot be
detected because the motor terminal voltage does not drop
very much even if a phase is lost when the load on the motor
is light. Use the asymmetry detection function to detect
asymmetry in the motor terminal voltages.
Set the operating time carefully because it will affect the time
from when the phase loss occurs until tripping when this
function is used.
Characteristic Curve Diagram
Note: This characteristic curve
shows the approximate values
only.
L1
V1
3φ 200 VAC
L2
L1
R1
X/b
X
X/a
V2 V3
R2
L2
R1: Slide resistor
200 Ω 200 W
R2: 100 Ω 400 W
L3
L3
Voltage (as a percentage of rated voltage)
Connection Diagram 2
100
95
90
80
±
C 200 V
8
VTR
75
70
65
60
55
50
45
Cycle counter
VST
85
0
VRS
10 20 30 40 50 60 70 80 90 100 110
Motor load (as a percentage of rated load)
Note: For phase loss of phase R. VST, VTR, and VRS indicate the motor
terminal voltage at phase loss.
K8AK-PA
Safety Precautions
Be sure to read the precautions for all models in the website at the following URL: http://www.ia.omron.com/.
Warning Indications
WARNING
Indicates a potentially hazardous situation
which, if not avoided, will result in minor or
moderate injury, or may result in serious
injury or death. Additionally there may be
significant property damage.
CAUTION
Indicates a potentially hazardous situation
which, if not avoided, may result in minor or
moderate injury or in property damage.
Precautions for Safe
Use
Supplementary comments on what to do or
avoid doing, to use the product safely.
Precautions for
Correct Use
Supplementary comments on what to do or
avoid doing, to prevent failure to operate,
malfunction, or undesirable effects on
product performance.
Meaning of Product Safety Symbols
Used to warn of the risk of electric shock under
specific conditions.
WARNING
Electrical shock may occasionally cause serious injury.
Confirm that the input voltage is OFF before starting any
wiring work and wire all connections correctly.
CAUTION
Electrical shock may cause minor injury.
Do not touch terminals while electricity is being supplied.
There is a risk of minor electrical shock, fire, or device failure.
Do not allow any pieces of metal, conductors, or cutting chips
that occur during the installation process to enter the product.
Explosions may cause minor injuries. Do not use the product
in locations with inflammable or explosive gases.
Used for general prohibitions for which there is no
specific symbol.
There is a risk of minor electrical shock, fire, or device failure.
Do not disassemble, modify, repair, or touch the inside of the
product.
Used to indicate prohibition when there is a risk of
minor injury from electrical shock or other source if
the product is disassembled.
Loose screws may cause fires. Tighten terminal screws to the
specified torque of 0.49 to 0.59 N·m.
Used for general mandatory action precautions for
which there is no specified symbol.
Use of excessive torque may damage the terminal screws.
Tighten terminal screws to the specified torque of 0.49 to
0.59 N·m.
Use of the product beyond its life may result in contact welding
or burning. Make sure to consider the actual operating
conditions and use the product within its rated load and
electrical life count. The life of the output relay varies
significantly with the switching capacity and switching
conditions.
9
K8AK-PA
Precautions for Safe Use
1. Do not use or store the product in the following locations.
• Locations subject to water or oil
• Outdoor locations or under direct sunlight
• Locations subject to dust or corrosive gases (particularly
sulfurizing gases, ammonia, etc.)
• Locations subject to rapid temperature changes
5. To reduce the error in the setting knob, always turn the setting
knob from the minimum setting toward the maximum setting.
6. Phase loss is detected only when the power supply to the motor is
turned ON. Phase loss during motor operation is not detected.
7. Phase loss can be detected only from the input contacts to the
power supply side. Phase loss cannot be detected from the input
contacts to the load side.
8. When cleaning the product, do not use thinners or solvents. Use
commercial alcohol.
• Locations prone to icing and dew condensation
• Locations subject to excessive vibration or shock
• Locations subject to wind and rain
• Locations subject to static electricity and noise
• Habitats of insects or small animals
2. Use and store the product in a location where the ambient
temperature and humidity are within the specified ranges. If
applicable, provide forced cooling.
3. Mount the product in the correct direction.
4. Do not wire the input and output terminals incorrectly.
5. Make sure the input voltage and loads are within the
specifications and ratings for the product.
6. Make sure the crimp terminals for wiring are of the specified size.
7. Do not connect anything to terminals that are not being used.
8. Use a power supply that will reach the rated voltage within 1
second after the power is turned ON.
9. Keep wiring separate from high voltages and power lines that
draw large currents.
Do not place product wiring in parallel with or in the same path as
high-voltage or high-current lines.
10.Do not install the product near equipment that generates high
frequencies or surges.
11.The product may cause incoming radio wave interference. Do not
use the product near radio wave receivers.
12.Install an external switch or circuit breaker and label it clearly so
that the operator can quickly turn OFF the power supply.
13.Make sure the indicators operate correctly. Depending on the
application environment, the indicators may deteriorate
prematurely and become difficult to see.
14.Do not use the product if it is accidentally dropped. The internal
components may be damaged.
15.Be sure you understand the contents of this catalog and handle
the product according to the instructions provided.
16.Do not install the product in any way that would place a load on it.
17.When discarding the product, properly dispose of it as industrial
waste.
18.The product must be handled only by trained electrician.
19.Prior to operation, check the wiring before you supply power to
the product.
20.Do not install the product immediately next to heat sources.
21.Perform periodic maintenance.
Correct Mounting Direction, Mounting,
and Removing
• Mounting to DIN Track
1. Attach the product to the DIN Track with the tab at the top and
the hooks at the bottom.
2. Push the product onto the Track until the hooks lock into place.
A
B
• Removing from the DIN Track
Pull down on the bottom hook with a flat-blade screwdriver and lift
up on the product.
Applicable DIN Tracks:
PFP-100N (100 cm)
PFP-50N (50 cm)
Adjusting the Setting Knobs
• Use a screwdriver to adjust the setting knobs. The knobs have a
stopper that prevents them from turning beyond the full right or left
position. Do not force a knob beyond these points.
Precautions for Correct Use
Observe the following operating
methods to prevent failure and
malfunction.
1. Use the input power and other power supplies and converters
with suitable capacities and rated outputs.
2. Use a precision screwdriver or similar tool to adjust the setting
knobs.
3. The distortion in the input waveform must be 30% max. If the
input waveform is distorted beyond this level, it may cause
unnecessary operation.
4. The product cannot be used for thyristor control or on the
secondary side of an inverter. To use the product on the primary
side of an inverter, install a noise filter on the primary side of the
inverter.
10
Setting knob
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.
OMRON Corporation
Industrial Automation Company
Authorized Distributor:
Tokyo, JAPAN
Contact: www.ia.omron.com
Regional Headquarters
OMRON EUROPE B.V.
Wegalaan 67-69-2132 JD Hoofddorp
The Netherlands
Tel: (31)2356-81-300/Fax: (31)2356-81-388
OMRON ELECTRONICS LLC
One Commerce Drive Schaumburg,
IL 60173-5302 U.S.A.
Tel: (1) 847-843-7900/Fax: (1) 847-843-7787
OMRON ASIA PACIFIC PTE. LTD.
No. 438A Alexandra Road # 05-05/08 (Lobby 2),
Alexandra Technopark,
Singapore 119967
Tel: (65) 6835-3011/Fax: (65) 6835-2711
OMRON (CHINA) CO., LTD.
Room 2211, Bank of China Tower,
200 Yin Cheng Zhong Road,
PuDong New Area, Shanghai, 200120, China
Tel: (86) 21-5037-2222/Fax: (86) 21-5037-2200
© OMRON Corporation 2014 All Rights Reserved.
In the interest of product improvement,
specifications are subject to change without notice.
CSM_3_1_0315
Cat. No. N186-E1-01
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0314 (0314)
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