K8AK-AS
6
Operation and Setting Methods
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Setting Ranges and Wiring Connections
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Connections
1.
Input
Connect the input between the I1-COM, I2-COM, or I3-COM terminals, according to the input
current. Malfunctions may occur if the input is connected to unused terminals and the Unit will
not operate correctly.
Terminal I1 is not used by the K8AK-AS3.
If using the OMRON K8AC-CT200L CT, connect to terminals k and l on the K8AC-CT200L.
(Terminals kt and lt are not used.)
2.
Power Supply
Connect the power supply to terminals A1 and A2.
3.
Outputs
Terminals 11, 12, and 14 are the output terminals (SPDT) for overvoltage.
Note:
Use the recommended ferrules if using twisted wires.
●
DIP Switch Settings
The resetting method, relay drive method, and operating mode are set using the DIP switch located on the bottom of the Unit.
K8AK-AS
@
does not use SW1.
●
Setting Method
1.
Setting Current
The current knob (SV) is used to set the current.
The current can be set to 10% to 100% of the maximum setting range.
Turn the knob while there is an input to the input terminals until the alarm indicator flashes (when the set value and the input have reached the
same level.)
Use this as a guide to set the current.
The maximum setting range will differ depending on the model and the input terminal.
Example: K8AK-AS3 Using Input Terminals I3-COM
The maximum setting range will be 200 A AC and the setting range will be 20 to 200 A.
2.
Hysteresis
Hysteresis is set using the hysteresis knob (HYS.)
The setting range is 5 to 50% of the operating value.
Turn the knob while there is an input to the input terminals until the alarm indicator flashes (when the set value and the input have reached the
same level.)
Use this as a guide to set the hysteresis.
Model
Setting range
Input type
Wiring connections
K8AK-AS1
2 to 20 mA AC/DC
Direct input
I1-COM
Note:
The DC input terminals have no polarity.
* The K8AK-AS3 is designed to be used in combination
with the OMRON K8AC-CT200L Current Transformer
(CT). (Direct input is not possible.)
10 to 100 mA AC/DC Direct input
I2-COM
50 to 500 mA AC/DC Direct input
I3-COM
K8AK-AS2
0.1 to 1 A AC/DC
Direct input or
commercially
available CT
I1-COM
0.5 to 5 A AC/DC
I2-COM
0.8 to 8 A AC/DC
---
I3-COM
K8AK-AS3
10 to 100 A AC*
OMRON CT
I2-COM
20 to 200 A AC*
OMRON CT
I3-COM
<For K8AK-AS3>
k
l
Load
Current input
Signal output
K8AC-
CT200L
14
12
A1
A2
I1
I2
I3
11
Relay
signal
output
C (COM)
K8AK-AS3
Single-phase power
Power supply
voltage
DIP switch pins
SW3
ON
OFF
SW2
SW1
SW4
DIP Switch Functions
Note:
All pins are set to OFF by default.
Pin
OFF
●
↑
ON
❍
↓
Resetting method
Manual reset
Not used.
●
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Automatic reset
❍
---
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Relay drive method
Normally open
---
●
---
Normally
closed
---
❍
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Operating mode
Overcurrent
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●
Undercurrent
---
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❍
1
OFF
ON
2
3
4
