Page 1
Single-phase Voltage Relay
K8AB-VS
Ideal for voltage monitoring for industrial
facilities and equipment.
• Monitor for overvoltages or undervoltages.
• Manual resetting and automatically resetting supported by one
Relay.
• One SPDT output relay, 6 A at 250 VAC (resistive load).
• Switch the output relay between normally ON and normally OFF
operation.
• Process control signal (0 to 10 V) and current splitter input
supported.
• Relay warning status easily monitoring using LED indicator.
• Input frequency of 40 to 500 Hz supported.
• Easy wiring with ferrules
2 × 2.5 mm
• CE mark compliance certified by third party.
UL certification pending.
Model Number Structure
2
solid or 2 × 1.5 mm2 standard ferrules.
■ Model Number Legend
K8AB-@@
123 4
1. Basic Model
K8AB: Measuring and Monitoring Relays
2. Functions
VS: Single-phase Voltage Relay (One-sided operation)
3. Measuring Current
1: 6 to 60 mV AC/DC, 10 to 100 mV AC/DC, 30 to 300 mV AC/DC
2: 1 to 10 V AC/DC, 3 to 30 V AC/DC, 15 to 150 V AC/DC
3: 20 to 200 V AC/DC, 30 to 300 V AC/DC, 60 to 600 V AC/DC
4. Supply Voltage
24 VDC: 24 VDC
24 VA C : 24 VA C
100-115 VAC: 100 to 115 VAC
200-230 VAC: 200 to 230 VAC
Cat. No. N143-E1-01 Single-phase Voltage Relay K8AB-VS 1
Page 2
Ordering Information
■ List of Models
Single-phase Voltage Relay Measuring voltage
(See note.)
6 to 60 mV AC/DC,
10 to 100 mV AC/DC,
30 to 300 mV AC/DC
1 to 10 V AC/DC,
3 to 30 V AC/DC,
15 to 150 V AC/DC
20 to 200 V AC/DC,
30 to 300 V AC/DC,
60 to 600 V AC/DC
Note: The rated input depends on the connected terminals. Select the terminals suitable for the inputs, and connect the inputs to V1-COM, V2-
COM, and V3-COM.
Supply voltage Model
24 VDC K8AB-VS1 24 VDC
24 VAC K8AB-VS1 24 VAC
100-115 VAC K8AB-VS1 100-115 VAC
200-230 VAC K8AB-VS1 200-230 VAC
24 VDC K8AB-VS2 24 VDC
24 VAC K8AB-VS2 24 VAC
100-115 VAC K8AB-VS2 100-115 VAC
200-230 VAC K8AB-VS2 200-230 VAC
24 VDC K8AB-VS3 24 VDC
24 VAC K8AB-VS3 24 VAC
100-115 VAC K8AB-VS3 100-115 VAC
200-230 VAC K8AB-VS3 200-230 VAC
Ratings and Specifications
■ Ratings
Operating power Non-isolated power supply 24 VDC (1 W)
Isolated power supply 24 VAC (4 VA), 100 to 115 VAC (4 VA), 200 to 230 VAC (5 VA)
Operate (SV) Operating value setting
range
Operating value 100% operation at set value
Reset (HYS.) Hysteresis 5% to 50% of operating value
Resetting method Manual reset/automatic reset (switchable)
Operating time (T) 0.1 to 30 s (Value when input rapidly changes from 0% to 120%.)
Power ON lock (LOCK) 1 s or 5 s error
Setting accuracy ±10% of full scale
Time error ±10% of set value (Minimum error: 50 ms)
Input frequency 40 to 500 Hz
Input impedance K8AB-VS1: 9 k
Indicators LED Power (PWR): Green LED, Relay output (RY): Yellow LED, Alarm output (ALM): Red LED
Output relays One SPDT relay (6 A at 250 VAC, resistive load)
10% to 100% of maximum rated input value
Manual reset: Turn OFF operating power for 1 s or longer.
is the shortest at this point.)
K8AB-VS2: 100 k
K8AB-VS3: 1 M
±0.5 s (Value when input rapidly changes from 0% to 100%. The operating time
Ω min.
Ω min.
Ω min.
2 Single-phase Voltage Relay K8AB-VS Cat. No. N143-E1-01
Page 3
■ Specifications
Ambient operating temperature −20 to 60°C (with no condensation or icing)
Storage temperature
Ambient operating humidity 25% to 85%
Storage humidity 25% to 85%
Altitude 2,000 m max.
Operating voltage range 85% to 110% of rated operating voltage
Rated power supply frequency 50/60 Hz ±5 Hz (AC power supply)
Output relays Resistive load 6 A at 250 VAC (cos
Inductive load 1 A at 250 VAC (cos
Minimum load 10 mA at 5 VDC
Maximum contact voltage 250 VAC
Maximum contact current 6 A AC
Maximum switching capacity 1,500 VA
Mechanical life 10,000,000 operations
Electrical life Make: 50,000 times, Break: 30,000 times
Terminal screw tightening torque 1.2 N·m
Crimp terminals
Insulation resistance 20 M
Degree of protection Terminal section: IP20, Rear case: IP40
Case color Munsell 5Y8/1 (ivory)
Case material ABS resin (self-extinguishing resin) UL94-V0
Weight 200 g
Mounting Mounted to DIN Track or via M4 screws
Dimensions 22.5 (W) x 90 (H) x 100 (D) mm
Installation environment Overvoltage Category III, Pollution Degree 2
Application standards EN60255-5/-6
Safety standards EN60664-1
EMC EMI: EN61326 Industrial applications
−40 to 70°C (with no condensation or icing)
6 A at 30 VDC (L/R = 0 ms)
1 A at 30 VDC (L/R = 7 ms)
Two solid wires of 2.5 mm
tightened together
Ω (at 500 V) between charged terminals and exposed uncharged parts
20 M
Ω (at 500 V) between any charged terminals (i.e., between input, output, and power
supply terminals)
Electromagnetic interference wave
CISPR11 Group 1, Class A: CISPR16-1/-2
Terminal interference wave voltage
CISPR11 Group 1, Class A: CISPR16-1/-2
EMS: EN61326 Industrial applications
Electrostatic discharge EN61000-4-2: 8 kV (in air)
Radiating radio-frequency electromagnetic field EN61000-4-3:
10 V/m 1 kHz sine wave amplitude modulation (80 MHz to 1 GHz)
Burst EN61000-4-4: 1 kV (I/O signal line), 2 kV (power line)
Surge EN61000-4-5: 1 kV with line (power line),
Conducted RF EN61000-4-6: 3 V (0.15 to 80 MHz)
Power frequency magnetic field immunity
EN61000-4-8: 30 A/m
Voltage dip/short interruptions
EN61000-4-11: 0.5 cycle, 0.180° each, polarity 100% (rated voltage)
φ = 1)
φ = 0.4)
2
, two crimp terminals of 1.5 mm2 with insulation sleeves, can be
2 kV with ground (power line)
Cat. No. N143-E1-01 Single-phase Voltage Relay K8AB-VS 3
Page 4
Connections
)
)
■ Wiring Diagram
Overcurrent Operation Diagram
(Output: Normally Closed)
Control power
Operating value
Alarm indicator
Relay
Input
Flashing
T
T1: Startup lock time (1 or 5 s)
T1
Note: 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.
Hysteresis
(5% to 50% of operating value)
Lit
T: Operating time (0.1 to 30 s)
Undercurrent Operation Diagram
(Output: Normally Open)
Control power
Input
Operating value
Alarm indicator
Relay
Flashing
Lit
T: Operating time (0.1 to 30 s)
T
T1: Power ON lock (1 or 5 s)
T1
Note: 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.
Hysteresis
(5% to 50% of operating value
Single-phase power
Input
Output
A1
A2
V1
V2
COM
V3
11
14
Alarm
12
Load
Operating
power
Model Measuring range Connection
K8AB-VS1 6 to 60 mV AC/DC V1-COM
10 to 100 mV AC/DC V2-COM
30 to 300 mV AC/DC V3-COM
K8AB-VS2 1 to 10 V AC/DC V1-COM
3 to 30 V AC/DC V2-COM
15 to 150 V AC/DC V3-COM
K8AB-VS3 20 to 200 V AC/DC V1-COM
30 to 300 V AC/DC V2-COM
60 to 600 V AC/DC V3-COM
Nomenclature
■ Front
Voltage knob (SV)
Power indicator
Relay status indicator
Alarm indicator
4 Single-phase Voltage Relay K8AB-VS Cat. No. N143-E1-01
Hysteresis knob (HYS.)
Operating time knob (T
Indicators
Item Meaning
Power indicator (PWR:
Lit when power is being supplied.
Green)
Relay status indicator (RY:
Yellow)
Lit when relay is operating.
Alarm indicator (ALM: Red) Lit when there is an overvoltage or
undervoltage.
The indicator flashes to indicate the
error status after the input has
exceeded the threshold value while the
operating time is being clocked.
Setting Knobs
Item Usage
Current knob (SV) Used to set the current to 10% to 100%
Hysteresis knob (HYS.) Used to set the rest value to 5% to 50%
Operating time knob (T) Used to set the operating time to 0.1 to
of maximum rated input current.
of the operating value.
30 s.
Page 5
■ Function Selection DIP Switch
ON
SW1
SW2
SW3
SW4
DIP Switch
Dimensions
DIP Switch Functions
Function Default
SW1 Power ON lock
time
SW2 Resetting method OFF Manual reset OFF
SW3 Relay drive
method
SW4 Operating mode OFF Overvoltage monitoring OFF
OFF 1 s OFF
ON 5 s
ON Automatic reset
OFF Normally open (normally
OFF
OFF)
ON Normally closed (norm ally
ON)
ON Undervoltage monitoring
K8AB-VS
22.5
100
5
90
5
Cat. No. N143-E1-01 Single-phase Voltage Relay K8AB-VS 5
Page 6
Safety Precautions
■ Precautions for Safe Use
Make sure to follow the instructions below to ensure safety.
1. Do not use or keep this product in the following environments.
• Outdoors, or places subject to direct sunlight or wearing
weather.
• Places where dust, iron powder, or corrosive gases (in
particular, sulfuric or ammonia gas) exist.
• Places subject to static electricity or inductive noise.
• Places where water or oil come in contact with the product.
2. Make sure to install this product in the correct direction.
3. There is a remote risk of electric shock. Do not touch terminals
while electricity is being supplied.
4. Make sure to thoroughly understand all instructions in the
Instructions Manual before handling this product.
5. Make sure to confirm terminal makings and polarity for correct
wiring.
6. Tighten terminal screws firmly using the following torque.
Recommended torque: 0.54 N·m
7. Operating ambient temperature and humidity for this product
must be within the indicated rating when using this product.
8. There is a remote risk of explosion. Do not use this product where
flammable or explosive gas exists.
9. Make sure that no weight rests on the product after installation.
10.To enable an operator to turn off this product easily, install
switches or circuit breakers that conform to relevant requirements
of IEC60947-1 and IEC60947-3, and label them appropriately.
11.For DC input, use a SELV power-supply capable of overcurrent
protection. Specifically, a SELV power-supply has a double or
reinforced insulation for input and output, and output voltage of
30 Vr.m.s with 42.4 V at peak or DC60V maximum.
Recommended power-supply: Model S8VS-06024@. (Omron
product)
■ Precautions for Correct Use
For Proper Use
1. Do not use the product in the following locations.
• Places subject to radiant heat from heat generating devices.
• Places subject to vibrations or physical shocks.
2. Make sure to use setting values appropriate for the controlled
object. Failure to do so can cause unintended operation, and may
result in accident or corruption of the product.
3. Do not use thinner or similar solvent for cleaning. Use commercial
alcohol.
4. When discarding, properly dispose of the product as industrial
waste.
5. Only use this product within a board whose structure allows no
possibility for fire to escape.
About Installation
1. When wiring, use only recommended crimp terminals.
2. Do not block areas around the product for proper dissipation of
heat. (If you do not secure space for heat dissipation, life cycle of
the product will be compromised.)
3. To avoid electrical shocks, make sure that power is not supplied to
the product while wiring.
4. To avoid electrical shocks, make sure that power is not supplied to
the product when performing DIP switch settings.
Noise Countermeasures
1. Do not install the product near devices generating strong high
frequency waves or surges.
2. When using a noise filter, check the voltage and current and
install it as close to the product as possible.
3. In order to prevent inductive noise, wire the lines connected to the
product separately from power lines carrying high voltages or
currents. Do not wire in parallel with or on the same cable as
power lines.
Other measures for reducing noise include running lines along
separate ducts and using shield lines.
To avoid faulty operations,
malfunctions, or failure, observe the
following operating instructions.
1. When turning on the power, make sure to realize rated voltage
within 1 second from the time of first supply of electricity.
2. Make sure to use power supply for operations, inputs, and
transformer with the appropriate capacity and rated burden.
3. Maintenance and handling of this product may only be performed
by qualified personnel.
4. Distortion ratio of input wave forms must be 30% or less. Use of
this product with circuits that have large distortion in wave forms
may result in unwanted operations.
5. Using this product for thyristor controls or inverters will result in
errors.
6. When setting the volume, adjust the control from the minimum
side to the maximum side.
6 Single-phase Voltage Relay K8AB-VS Cat. No. N143-E1-01
Page 7
Warranty and Application Considerations
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.
Warranty and Limitations of Liability
WARRANTY
OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other
period if specified) from date of sale by OMRON.
OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT,
MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES
THAT THE BUYER OR USER ALONE HAS DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS
OF THEIR INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.
LIMITATIONS OF LIABILITY
OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS, OR
COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CONTRACT,
WARRANTY, NEGLIGENCE, OR STRICT LIABILITY.
In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which liability is asserted.
IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS 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 OR REPAIR.
Application Considerations
SUITABILITY FOR USE
OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the combination of products in
the customer's application or use of the products.
Take all necessary steps to determine the suitability of the product for the systems, machines, and equipment with which it will be used.
Know and observe all prohibitions of use applicable to this product.
NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY WITHOUT ENSURING
THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON PRODUCTS ARE
PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.
Disclaimers
PERFORMANCE DATA
Performance data given in this catalog 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 users must correlate it to actual application requirements. Actual
performance is subject to the OMRON Warranty and Limitations of Liability.
CHANGE IN SPECIFICATIONS
Product specifications and accessories may be changed at any time based on improvements and other reasons. Consult with your
OMRON representative at any time to confirm actual specifications of purchased product.
DIMENSIONS AND WEIGHTS
Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when tolerances are shown.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
Cat. No. N143-E1-01
In the interest of product improvement, specifications are subject to change without notice.
OMRON Corporation
Industrial Automation Company
Industrial Devices and Components Division H.Q.
Industrial Control Components Department
Shiokoji Horikawa, Shimogyo-ku,
Kyoto, 600-8530 Japan
Tel: (81)75-344-7119/Fax: (81)75-344-7149
Loading...