Timing Charts - Omron K8AK-PH1 200/500VAC Manual

Timing Charts

• Always turn on the control power supply for K8AK at least 2 seconds before load startup.
• Be aware that there is a power ON lock time (approx. 1 s) for the K8AK.
• Output relays 11-14 and 21-24 will be conductive when the input level is normal.
• The startup lock time only functions during the first load startup. After load is stopped, the startup lock time will be in effect again when restarted.
• There is no startup lock time function when monitoring undercurrent.
●Overcurrent and Undercurrent Operation Diagram (Overcurrent/Undercurrent Monitoring Mode)
DIP switch settings: SW3 ON and SW4 ON, or SW3 OFF and SW4 OFF
Power ON
K8AK power supply voltage
Input
Overcurrent set value (AL1)
Undercurrent set value (AL2)
30% of AL1 current set value
0 A
AL1 alarm indicator
Flashing
AL2 alarm indicator
Operating time
(0.1 to 30 s)
Overcurrent (AL1)
contacts (11-14)
Undercurrent (AL2)
contacts (21-24)
Delay: 250 ms
(reference value)
Power ON lock (approx. 1 s)
Delay: 250 ms
(reference value)
□
Note: 1. The K8AK-AW output contacts are normally operative.
2. Power ON lock prevents unnecessary alarms from being generated during the unstable period when the power is first turned ON.
There is no contact output during timer operation.
3. There is no startup lock time function for monitoring undercurrent.
●Overcurrent and Overcurrent Operation Diagram (Overcurrent/Overcurrent Monitoring Mode)
(When Using as an Overcurrent Pre-alarm)
DIP switch settings: SW3 ON and SW4 OFF
K8AK power supply voltage
Overcurrent set value (AL1)
Overcurrent set value (AL2)
30% of AL1 current set value
0 A
30% of AL2 current set value
AL1 alarm indicator
AL2 alarm indicator
Overcurrent (AL1)
contacts (11-14)
Overcurrent (AL2)
contacts (21-24)
Power ON lock (approx. 1 s)
Delay: 250 ms
(reference value)
□
Note: 1. The K8AK-AW output contacts are normally operative.
2. Power ON lock prevents unnecessary alarms from being generated during the unstable period when the power is first turned ON.
There is no contact output during timer operation.
Flashing Lit
Operating time
Lit
(0.1 to 30 s)
Flashing
Startup lock time
(0 to 30 s)
Operating time
Delay: 250 ms
(reference value)
Flashing
Flashing
AL1 startup lock time
(0 to 30 s)
AL2 startup lock time
(0 to 30 s)
See note 3.
Lit
Startup lock time
(0 to 30 s)
(0.1 to 30 s)
Delay: 250 ms
(reference value)
Lit
Lit
t: Operating time (0.1 to 30 s)
t
t: Operating time (0.1 to 30 s)
t
K8AK-AW
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
Delay: 250 ms
(reference value)
Delay: 250 ms
(reference value)
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