Connections Wiring Diagrams; Timing Charts - Omron K8AK-TH Manual

Temperature monitoring relay
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K8AK-TH
Connections
Wiring Diagrams
K8AK-TH11S
Power supply
1
voltage*
A1
A2
Power supply
Relay output
14 11 12
External input
(LATCH_RST)
*
2
4 5 6
1
2 3
Sensor input
+
Thermocouple
B
B
A

Timing Charts

Temperature Alarm: Hysteresis: 2°C/°F
Temperature setting
Temperature alarm upper limit (11) to (14)
Temperature alarm lower limit (11) to (14)
Changing between Normally Open and Normally Closed
Power supply
Temperature alarm or other error
Relay output (normally open) (11) to (14)
Relay output (normally closed) (11) to (14)
* Other errors: sensor open circuit error, sensor input error, temperature setting
error, and memory error.
Latched Operation: Relay outputs remain latched even after the alarm
or error is reset.
Power supply
Temperature alarm or other error
LATCH_RST or external inputs (4) to (5)
Relay output (latched) (11) to (14)
* To enter SV Protect Mode or reset the latch, turn ON the LATCH_RST signal or
external input for at least 5 seconds.
Operation of Indicators
Power supply
SV Protect Mode
PWR indicator
Power supply
Temperature alarm
Other error
ALM indicator
4
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K8AK-TH12S
Not used.
Power supply
Relay output
External input
(LATCH_RST)
*
2
Not used.
Sensor input
Pt resistance thermometer input
2°C (°F)
2°C (°F)
0.02 s
Flashing
Flashing
Power supply
voltage*
1
Not used.
A1
A2
14 11 12
*1 The input power supply depends on the
*2
4 5 6
Not used.
1
2 3
Not used.
+
Thermocouple
model: 100 to 240 VAC or 24 VAC/VDC (no
polarity)
Wiring of the external input terminals is as shown
below.

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