1
Single-phase Voltage Relay
K8AK-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, 5 A at 250 VAC (resistive load).
• Output relay can be switched between normally open and
normally closed.
• Process control signal (0 to 10 V) and current splitter input
supported.
• Output status can be monitored using LED indicator.
• Input frequency of 40 to 500 Hz supported.
• Inputs are isolated from the power supply.
Ordering Information
List of Models
Ratings and Specifications
Input Range
* The range is selected using connected terminals.
Refer to
Safety Precautions for the K8AK Series
on page 86.
Refer to page 30 for commonly asked questions.
For the most recent information on models that have been certified for
safety standards, refer to your OMRON website.
Setting range
Control power supply
voltage
Model
1 to 10 V AC/DC
3 to 30 V AC/DC
15 to 150 V AC/DC
24 VAC/DC
K8AK-VS2 24 VAC/DC
100 to 240 VAC
K8AK-VS2 100-240 VAC
20 to 200 V AC/DC
30 to 300 V AC/DC
60 to 600 V AC/DC
24 VAC/DC
K8AK-VS3 24 VAC/DC
100 to 240 VAC
K8AK-VS3 100-240 VAC
Model
Range*
Connection terminal
Setting range
Input impedance
Overload capacity
K8AK-VS2
0 to 10 V AC/DC
V1-COM
1 to 10 V AC/DC,
3 to 30 V AC/DC,
15 to 150 V AC/DC
Approx. 120 k
Ω
Continuous input at
115% of maximum input
10 s at 125%
(up to 600 VAC)
0 to 30 V AC/DC
V2-COM
Approx. 320 k
Ω
0 to 150 V AC/DC
V3-COM
Approx. 1.6 M
Ω
K8AK-VS3
0 to 200 V AC/DC
V1-COM
20 to 200 V AC/DC,
30 to 300 V AC/DC,
60 to 600 V AC/DC
Approx. 1.2 M
Ω
0 to 300 V AC/DC
V2-COM
Approx. 1.7 M
Ω
0 to 600 V AC/DC
V3-COM
Approx. 3.1 M
Ω
