Omron K8AK-AS1 24VAC/DC, Manual

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K8AK-AW
8
●
Undercurrent and Undercurrent Operation Diagram (Undercurrent/Undercurrent Monitoring Mode)
(When Using as an Undercurrent Pre-alarm)
DIP switch settings: SW3 OFF and SW4 ON
Nomenclature
Front
●
Indicators
●
Setting Knobs
Note: 1. Use either a solid wire of 2.5 mm
2
maximum or a ferrule with insulating
sleeve for the terminal connection.
The length of the exposed current-
carrying part inserted into the terminal
must be 8 mm or less to maintain
dielectric strength after connection.
<Recommended ferrules>
Phoenix Contact

Al 1,5-8BK (for AWG16)

Al 1-8RD (for AWG18)

Al 0,75-8GY (for AWG18)
2. Tightening torque: 0.49 to 0.59 N·m
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.
Lit
Flashing
Lit
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
AL1 alarm indicator
AL2 alarm indicator
Undercurrent (AL1)
contacts (11-14)
0 A
Undercurrent set value (AL2)
Undercurrent (AL2)
contacts (21-24)
Undercurrent set value (AL1)
K8AK power supply voltage
Flashing
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)
Delay: 250 ms
(reference value)
Flashing
Flashing
Power ON lock (approx. 1 s)
Operating time
(0.1 to 30 s)
Power indicator
Relay status indicator
Current knob (AL1)
Operating time knob (T)
Startup lock time knob
(LOCK)
Alarm indicator
Terminal block
(See notes 1 and 2.)
Terminal block
(See notes 1 and 2.)
Alarm indicator
Current knob (AL2)
Item Meaning
Power indicator (PWR: Green) Lit when power is being supplied.
Relay status indicator
(RY: Yellow)
Lit when relay is operating.
Alarm indicator
(ALM: Red)
Lit when there is an overcurrent or un-
dercurrent.
The indicator flashes to indicate the er-
ror status after the input has exceeded
the set value while the operating time is
being clocked.
Item Usage
Current knob (AL1)
Used to set the current to 10% to 100%
of maximum setting range.
Current knob (AL2)
Used to set the current to 10% to 100%
of maximum setting range.
Operating time knob (T) Used to set the operating time to 0.1 to 30 s.
Startup lock time knob
(LOCK)
Used to set the startup lock time to 0 to 30 s.
Use for the purpose of preventing unwant-
ed operation, e.g., as a result of inrush cur-
rent during load startup. There will be no
alarm output when the startup lock timer is
operating.
For 2.5 mm
2
or
smaller solid wires
8 mm max.
For ferrules with
an insulation sleeve.
8 mm max.