K8AK-AW
7
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
●
Overcurrent and Overcurrent Operation Diagram (Overcurrent/Overcurrent Monitoring Mode)
(When Using as an Overcurrent Pre-alarm)
DIP switch settings: SW3 ON and SW4 OFF
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.
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
K8AK power supply voltage
Power ON
Undercurrent (AL2)
contacts (21-24)
Undercurrent set value (AL2)
30% of AL1 current set value
Overcurrent (AL1)
contacts (11-14)
Lit
AL2 alarm indicator
AL1 alarm indicator
Overcurrent set value (AL1)
Lit
Flashing
Flashing
Power ON lock (approx. 1 s)
Delay: 250 ms
(reference value)
Delay: 250 ms
(reference value)
Delay: 250 ms
(reference value)
Delay: 250 ms
(reference value)
Input
Operating time
(0.1 to 30 s)
Operating time
(0.1 to 30 s)
Operating time
(0.1 to 30 s)
Startup lock time
(0 to 30 s)
Startup lock time
(0 to 30 s)
Lit
Flashing
0 A
See note 3.
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
Flashing
Lit
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
AL1 alarm indicator
AL2 alarm indicator
Overcurrent (AL1)
contacts (11-14)
Overcurrent set value (AL2)
30% of AL1 current set value
30% of AL2 current set value
Overcurrent (AL2)
contacts (21-24)
Overcurrent set value (AL1)
0 A
K8AK power supply voltage
t: Operating time (0.1 to 30 s)
t: Operating time (0.1 to 30 s)
t
t
Delay: 250 ms
(reference value)
Delay: 250 ms
(reference value)
Delay: 250 ms
(reference value)
Power ON lock (approx. 1 s)
AL1 startup lock time
(0 to 30 s)
AL2 startup lock time
(0 to 30 s)
Summary of Contents for K8AK-AS1 24VAC/DC
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