Omron K8AB-TH11S, K8AB-TH12S Product Manual

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 mm2 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.

1243

K8AB-TH1@@

Temperature Monitoring Relay Input type Temperature

setting range

Setting unit Supply voltage Model

Thermocouple/
Pt100

0 to 399

°C/°F1°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

2 Temperature Monitoring Relay K8AB-TH

Specifications

■ Ratings

■ Characteristics

Item Power supply voltage 100 to 240 VAC 50/60 Hz 24 VAC 50/60 Hz or 24 VDC

Allowable voltage range 85% to 110% of power supply voltage

Power consumption 5 VA max. 2 W max. (24 VDC), 4 VA max. (24 VAC)

Sensor inputs K8AB-TH11S Thermocouple: K, J, T, E; Platinum-resistance thermometer: Pt100

K8AB-TH12S Thermocouple: K, J, T, E, B, R, S, PLII

Output relay One SPDT relay (3 A at 250 VAC, resistive load)

External inputs
(for latch setting)

Contact input ON: 1 k

Ω max., OFF: 100 kΩ min.

Non-contact input ON residual voltage: 1.5 V max., OFF leakage current: 0.1 mA max.

Leakage current: Approx. 10 mA

Setting method Rotary switch setting (set of three switches)

Indicators Power (PWR): Green LED, Relay output (ALM): Red LED

Other functions Alarm Mode (upper limit/lower limit), non-fail safe/fail safe selection, output latch, setting protection, temperature

unit

°C/°F

Ambient operating temperature

−10 to 55°C (with no condensation or icing)

Ambient operating humidity Relative humidity: 25% to 85%

Storage temperature

−25 to 65°C (with no condensation or icing)

Setting accuracy ±2.0% of full scale

hysteresis width 2

°C

Output relay Resistive load 3 A at 250 VAC (cos

φ = 1), 3 A at 30 VDC (L/R = 0 ms)

Inductive load 1 A at 250 VAC (cos

φ = 0.4), 1 A at 30 VDC (L/R = 7 ms)

Minimum load 10 mA at 5 VDC

Maximum contact voltage 250 VAC

Maximum contact current 3 A AC

Maximum switching capacity 1,500 VA

Mechanical life 10,000,000 operations

Electrical life Make: 50,000 times, Break: 30,000 times

Sampling cycle 500 ms

Insulation resistance 20 M

Ω (at 500 V) between charged terminals and exposed uncharged parts

20 M

Ω (at 500 V) between any charged terminals (i.e., between input, output, and power supply terminals)

20 M

Ω (at 500 V) between contacts (open)

Dielectric strength 2,000 VAC 50/60 Hz for 1 min between charged terminals of different polarity

Vibration resistance

Vibration of 10 to 55 Hz and acceleration of 50 m/s

2

for 5 min with 10 sweeps each in X, Y, and Z directions

Shock resistance

150 m/s

2

(100 m/s2 for relay contacts) 3 times each in 6 directions in X, Y, and Z directions

Weight 130 g

Degree of protection IP20

Memory protection Non-volatile memory (number or writes: 200,000)

Safety
Standards

Approved standards EN 61010-1

Application standards EN 61326 and EN 61010-1 (pollution level 2, overvoltage category II)

EMC EMI: EN 61326

Radiation Interference Field Intensity: EN 55011 Group 1 Class A
Noise Terminal Voltage: EN 55011 Group 1 Class A
EMS: EN 61326
Immunity ESD: EN 61000-4-2: 4 kV contact discharge (level 2)

8 kV air discharge (level 3)

Immunity RF: EN 61000-4-3: 10 V/m, amplitude-modulated

(80 MHz to 1 GHz, 1.4 GHz to 2 GHz) (level 3)

Immunity Burst: EN 61000-4-4: 2 kV power line (level 3)

2 kV output line (relay output) (level 4)

1 kV measurement line and I/O signal lines (level 4)
Immunity Conducted Disturbance: EN 61000-4-6: 3 V (0.15 to 80 MHz) (level 3)
Immunity Surge: EN 61000-4-5: 1 kV line-to-line: power line, output line

(relay output) (level 2)

2 kV line-to-ground: power line, output line

(relay output) (level 3)
Commercial Frequency
Immunity Magnetic Field: EN 61000-4-8: 30 A/m (50Hz) continuous time
Immunity Voltage Dip/Interrupting: EN 61000-4-11: 0.5 cycle, 100% (rated voltage)

Terminal screw tightening torque 0.54 to 0.55 N·m

Crimp terminals

Two solid wires of 2.5 mm

2

or two ferrules of 1.5 mm2 with insulation sleeves can be tightened together.

Case color Munsell 5Y8/1 (ivory)

Case material ABS resin (self-extinguishing resin)

Mounting Mounted to DIN Track or with M4 screws

Dimensions 22.5

× 100 × 90 mm (W × D × H)

Temperature Monitoring Relay K8AB-TH 3

■ Setting Ranges

K8AB-TH11S

Centigrade

Fahrenheit

K8AB-TH12S

Centigrade

Fahrenheit

Input KJTEPt100

Setting
tempera­ture range

500
400
300
200
100

0

399 399 399 399 399

00000

Minimum setting
increment

1°C

Input KJTEPt100

Setting
tempera­ture range

500
400
300
200
100

0

399 399 399 399 399

00000

Minimum setting
increment

1°F

Input KJTEBRSPLII

Setting
tempera­ture 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

0000 000

Minimum setting
increment

10°C

Input KJTEBRSPLII

Setting
tempera­ture range

3,200
3,100
3,000
2,900
2,800
2,700
2,600
2,500
2,400
2,300
2,200
2,100
2,000
1,900
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

3,200

3,000 3,000

2,300 2,300

1,500

1,100

700

300

0000 000

Minimum setting
increment

10°F