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Ordering Information
■ List of Models
Single-phase Current Relay
Note: 1. Models with a 24-VDC power supply have a non-isolated power supply.
The inputs and power supply are connected internally, so a malfunction may occur due to an unwanted current path if the inputs and
power supply are connected to the same line.
If an unwanted current path exists, use a K8AB AC Power Supply or isolate with an external power supply.
2. The K8AB-AS3 is designed to be used in combination with an OMRON K8AC-CT200L Current Transformer (CT). (Direct input is not
possible.)
■ Accessory (Order Separately)
OMRON CT
Current Transformer
Other CTs
CT current on secondary side
0 to 1 A AC,
0 to 5 A AC
Ratings and Specifications
■ Input Range
Model
Range
K8AB-AS1
2 to 20 mA AC/DC
10 to 100 mA AC/DC I2-COM
50 to 500 mA AC/DC I3-COM
K8AB-AS2
0.1 to 1 A AC/DC
0.5 to 5 A AC/DC
0.8 to 8 A AC/DC
K8AB-AS3
10 to 100 A AC
20 to 200 A AC
2
Single-phase Current Relay
Measuring current
Supply voltage
2 to 20 mA AC/DC,
24 VDC, not insulated
10 to 100 mA AC/DC,
24 VAC, insulated
50 to 500 mA AC/DC
100-115 VAC, insulated K8AB-AS1 100-115 VAC
200-230 VAC, insulated K8AB-AS1 200-230 VAC
0.1 to 1 A AC/DC,
24 VDC, not insulated
0.5 to 5 A AC/DC,
24 VAC, insulated
0.8 to 8 A AC/DC
100-115 VAC, insulated K8AB-AS2 100-115 VAC
200-230 VAC, insulated K8AB-AS2 200-230 VAC
10 to 100 A AC,
24 VDC, not insulated
20 to 200 A AC
24 VAC, insulated
(See note 2.)
100-115 VAC, insulated K8AB-AS3 100-115 VAC
200-230 VAC, insulated K8AB-AS3 200-230 VAC
Input range
Applicable Relay
10 to 100 A AC,
K8AB-AS3
20 to 200 A AC
Applicable Relay
K8AB-AS2
Connection terminal
Input impedance
Approx. 5 Ω
I1-COM
Approx. 1 Ω
Approx. 0.2 Ω
Approx. 0.12 Ω (load: 0.5 VA)
I1-COM
Approx. 0.02 Ω (load: 1.5 VA)
I2-COM
Approx. 0.02 Ω (load: 3 VA)
I3-COM
I2-COM
Uses commercial CT
I3-COM
Uses commercial CT
K8AB-AS
Model
K8AB-AS1 24 VDC (See note 1.)
K8AB-AS1 24 VAC
K8AB-AS2 24 VDC (See note 1.)
K8AB-AS2 24 VAC
K8AB-AS3 24 VDC (See note 1.)
K8AB-AS3 24 VAC
Model
K8AC-CT200L
Overload capacity
120% max. input continuous
150% max. input for 1 s
120% max. input continuous
200% max. input for 30 s
600% max. input for 1 s
Cat. No. N142-E1-02
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