4
Temperature Monitoring Relay
K8AB-TH
Connections
■
Wiring Diagrams
■
Operation (Using the Upper-limit Alarm Mode)
Output Latch Enabled (Default Setting:
Latch Enabled)
Output Latch Disabled
1
+
−
2
3
4
5
6
14 11
Power supply
voltage (See note.)
12
A1
A2
1
+
−
2
3
4
5
6
14 11 12
A1
A2
Power supply
voltage (See note.)
Power supply
Relay output
Power supply
Relay output
External input
(LATCH_RST)
(See note 2.)
Sensor input
External input
(LATCH_RST)
(See note 2.)
Sensor input
Not used.
Not used.
Not used.
Thermocouple
Thermocouple
Platinum resistance thermometer
K8AB-TH11S
K8AB-TH12S
Note: 1.
The input power supply depends on
the model: 100 to 240 VAC or 24 VAC/
VDC (no polarity)
2.
Wiring of the external input terminals
is as shown below.
Hysteresis width: 2
°
C
Power supply
Alarm setting
Alarm (red) indicator
Input (current temperature)
Latch reset (See note.)
Non-fail safe,
Alarm (relay) output
Fail safe,
Alarm (relay) output
Note: The output latch is reset using the output latch reset button
on the Temperature Monitoring Relay or the external input terminal.
Power supply
Alarm setting
Alarm (red) indicator
Input (current temperature)
Hysteresis width: 2
°
C
Non-fail safe,
Alarm (relay) output
Fail safe,
Alarm (relay) output
