Wiring Example; Timing Charts - Omron K8AK-AS Manual

K8AK-AS
Connections
Terminal Diagram
K8AK-AS1 100-240VAC
A B
Control Output
Relay output
250 VAC, 5 A (resistive load)
30 VDC, 5 A (resistive load)
B Power Supply Voltage
100 to 240 VAC 24 VAC/DC
A1 A2
A1
(No polarity)
Note: 1. Do not connect anything to terminals that are shaded in gray.
2. There is no polarity for the DC power supply input.
3. For the current input, you can input only from the C terminal and one other terminal.
4. Refer to Setting Ranges and Wiring Connections on the I1, I2, and I3 current input terminals.
5. Use the recommended ferrules if you use twisted wires.
6. The K8AK-AS3 is designed to be used in combination with the OMRON K8AC-CT200L Current Transformer (CT).

Wiring Example

Directly Inputting a Current
Single-phase
power supply
Power supply
A2
voltage
A1

Timing Charts

●Overcurrent Operation Diagram
(Output Relay Drive Method: Normally Open)
DIP switch setting: SW3 OFF, SW4 OFF
Power supply
voltage
Set value
Hysteresis
Input
30% of operating value
Alarm indicator
Relay 11-14
Relay 11-12
Power ON lock
(approx. 1 s)
LOCK
4
A1 C
I1 I2
A2
11 12
A1 C A2
I1 I2 I3
11 12 14
Flashing
Lit
Delay: 250 ms (reference value)
t: Operating time (0.1 to 30 s)
t t
LOCK: Startup lock time (0 to 30 s)
A Current Input
A2
AS1 AS2
C
I3
I1 I2 I3 I1
Relay Output
Common
11 12 14
14
Using a CT
Single-phase
Load
power supply
Power
A2
supply voltage
A1
Power
supply
AC/DC
●Undercurrent Operation Diagram
(Output Relay Drive Method: Normally Closed)
DIP switch setting: SW3 ON, SW4 ON
Power supply
voltage
Input
Set value
Alarm indicator
Relay 11-14
Relay 11-12
Power ON lock
(approx. 1 s)
AS3
C C
CT CT
I2 I3 I1 I2 I3
CT
A1 C A2
I1 I2 I3
11 12 14
Hysteresis
Flashing
(5% to 50% of operating value)
Lit
Delay: 250 ms (reference value)
t: Operating time (0.1 to 30 s)
t
Load
Power
supply
AC/DC