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Temperature Monitoring Relay

 K8AB-TH

1

Temperature Monitoring Relay

K8AB-TH

Compact and Slim Relay Ideal for 
Temperature Alarms and Monitoring

• Excessive temperature increases can be prevented and abnormal 

temperatures can be monitored.

• Temperature monitoring in slim design with a width of just 22.5 mm.
• Simple function settings using DIP switch.
• Multi-input support for thermocouple or Pt100 sensor input.
• Selectable output relay: Non-fail safe/fail safe. 
• Alarm status identification with LED indicator.
• CE Marking

UL/CSA certification pending. 

Features

This Temperature Monitoring Relay was designed specially for 
monitoring abnormal temperatures to prevent excessive 
temperature increase and to protect equipment. 

A relay capacity of 3 A at 250 VAC (resistive load) is provided. 
An output latch function is also supported. 

Settings can be made and functions can be selected using the DIP 
switch.

Reduce the number of models by using multi-input support for 
thermocouple or Pt100 sensor input.

Selecting Functions and Modes

The following settings are provided: alarm mode (upper limit/lower 
limit), enable/disable latch, 

°

C/

°

F, relay output non-fail safe/fail safe, 

setting protection. 

Terminal Wiring with Ferrules

Wire with 2 

×

 2.5 mm

2

 solid wire or 2 

×

 1.5 mm

2

 wiring ferrules. 

Model Number Structure

Model Number Legend

1. Basic Model

K8AB: Measuring and Monitoring Relay

2. Function

TH1: Temperature Monitoring Relay

3. Setting Range

1: Low-temperature range (0 to 399

°

C: setting in increments of 

1

°

C)

2: High-temperature range (0 to 1800

°

C max.: setting in 

increments of 10

°

C)

4. Output Form

S: One SPDT relay output

Ordering Information

List of Models

Note:

Refer to page 3 for setting ranges.

1

2

4

3

K8AB-TH1

@@

Temperature Monitoring Relay

Input type

Temperature 

setting range

Setting unit

Supply voltage

Model

Thermocouple/
Pt100

0 to 399

°

C/

°

F

1

°

C/

°

F

100 to 240 VAC

K8AB-TH11S 100-240VAC

24 VAC/VDC

K8AB-TH11S 24VAC/VDC

Thermocouple

0 to 1,700

°

C

0 to 3,200

°

F

10

°

C/

°

F (See note.)

100 to 240 VAC

K8AB-TH12S 100-240VAC

24 VAC/VDC

K8AB-TH12S 24VAC/VDC

Summary of Contents for K8AB-TH

Page 1: ...r of models by using multi input support for thermocouple or Pt100 sensor input Selecting Functions and Modes The following settings are provided alarm mode upper limit lower limit enable disable latc...

Page 2: ...s i e between input output and power supply terminals 20 M at 500 V between contacts open Dielectric strength 2 000 VAC 50 60 Hz for 1 min between charged terminals of different polarity Vibration res...

Page 3: ...ement 1 F Input K J T E B R S PLII Setting tempera ture range 1 800 1 700 1 600 1 500 1 400 1 300 1 200 1 100 1 000 900 800 700 600 500 400 300 200 100 0 1 800 1 700 1 700 1 300 1 300 850 600 400 100...

Page 4: ...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...

Page 5: ...itoring Relay error See note 1 Item Usage Output latch reset button The output latch can be reset by pressing this button Enabled when latch is enabled See note 2 Alarm setting rotary switch Set each...

Page 6: ...l input terminal for at least 5 s The power indicator will flash when the protection is activated The protection function can be released by pressing the output latch reset button on the Temperature M...

Page 7: ...ring Relay Allow as much space as possible between the Temperature Monitoring Relay and devices that generate powerful high frequencies high frequency welders high frequency sewing machines etc or sur...

Page 8: ...ndividual price of the product on which liability is asserted IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY REPAIR OR OTHER CLAIMS REGARDING THE PRODUCTS UNLESS OMRON S ANALYSIS CONFIRMS THAT TH...

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