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K8AK-TH Temperature Monitoring
New

K8AK-TH Temperature Monitoring

New product

Protect your heating application

This temperature monitoring relay was designed specially for monitoring abnormal temperatures to prevent excessive

temperature increase and to protect equipment. K8AK-TH provides temperature monitoring in slim design with a width of

just 22.5mm.

Simple function settings using DIP switchSelectable alarm latch and SV setting protectionMulti-input support for thermocouple or Pt100 and Pt1000 sensor inputChangeover relay: fail-safe selectableAlarm status identification with LED

Ordering information

Input type

Temperature setting range

Setting unit

Supply voltage

Size in mm (H×W×D)

Order code

Thermocouple/
Pt100 and Pt1000

0 to 999°C/F

1°C/F

100 to 240 VAC

90×22.5×100

K8AK-TH11S AC100-240

24 VAC/VDC

K8AK-TH11S AC/DC24

Thermocouple

0 to 1,800°C
0 to 3,200 °F 

1

10°C/F

100 to 240 VAC

K8AK-TH12S AC100-240

24 VAC/VDC

K8AK-TH12S AC/DC24

Specifications

Item

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

K8AK-TH11S

Thermocouple: K, J, T, E; platinum-resistance thermometer: Pt100, Pt1000

K8AK-TH12S

Thermocouple: K, J, T, E, B, R, S, PLII

Output relay

One SPDT relay (5 A at 250 VAC, resistive load)

External inputs
(for latch setting)

Contact input

ON: 1 kΩ 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), output normally ON/OFF selection, output latch, setting protection,
fail-safe operation selectable, temperature unit °C/°F

Ambient operating temperature

-20 to 55°C (with no condensation or icing)

Storage temperature

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

Setting accuracy

±1% of full scale

Hysteresis width

2°C

Output relays

(1 × SPDT, normally closed operation)

Resistive load

5 A at 250 VAC or at 30 VDC

Maximum contact voltage

250 VAC or 30 VDC

Maximum contact current

5 A

Maximum switching capacity

1,250 VA, 150 W

Mechanical life

10,000,000 operations

Electrical life

50,000 operations at 5 A, 250 VAC or 30 VDC

Sampling cycle

100 ms

Weight

160 g

Degree of protection

IP20

Memory protection

Non-volatile memory (number or writes: 1,000,000)

Safety standards

Approved standards

EN 61010-1 (Pollution level 2, overvoltage category II)

Application standards

EN 61326-1, UL 61010-1, Korean Radio Waves Act (Act 10564), CSA:CAN/CSA C22.2 No.14, CCC: GB14048.5

Crimp terminals

Two solid wires of 2.5 mm2 or two ferrules of 1.5 mm2 with insulation sleeves can be tightened together

Case material

PC and ABS

Mounting

Mounted to DIN-rail

Size in mm (H×W×D)

90×22.5×100

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