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K8AB-TH

Temperature Monitoring Relay

OMRON Corporation 

Connections

■ Wiring Diagrams

K8AB-TH11S

Power supply

voltage (See note 1.)

Power supply

Relay output

A1 A2

14 11 12

K8AB-TH12S

Power supply

voltage (See note 1.)

Power supply

Relay output

A1 A2

14 11 12

K8AB-TH

External input

(LATCH_RST)

(See note 2.)

Sensor input

456

123

Not used.

External input

(LATCH_RST)

(See note 2.)

Sensor input

456

123

Not used.

Not used.

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.

Thermocouple B B A

Platinum resistance thermometer

Thermocouple

■ Operation (Using the Upper-limit Alarm Mode)

Output Latch Enabled (Default Setting:

Latch Enabled)

Power supply

Alarm setting

Input (current temperature)

Hysteresis width: 2°C

Alarm (red) indicator

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.

Output Latch Disabled

Power supply

Alarm setting

Input (current temperature)

Alarm (red) indicator

Non-fail safe,

Alarm (relay) output

Fail safe,

Alarm (relay) output

Hysteresis width: 2°C

4

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