Omron, K8AK-TH

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.
Rotary switches simplifies temperature settings.
Universal-input support for thermocouple or platinum resistance thermometer sensor input.
Change the output relay between normally open and normally closed operation.
Alarm status identification with LED indicator.
Self-holding output.
Alarm output status can be retained even if the power supply is turned OFF.

last update: April 3, 2017

Ratings

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	K8AK-TH11S	Thermocouple: K, J, T, E; Platinum-resistance thermometer: Pt100, Pt1000
Sensor inputs	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), non-fail safe/fail safe selection, output latch, setting protection, temperature unit °C/°F
Ambient operating temperature		-20 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)

Characteristics

Measurement accuracy		K8AK-TH11S: ±1% of the setting range or ±4°C, whichever is larger K8AK-TH12S: ±1% of the setting range (±1% FS)
hysteresis width		2°C
Output relay		Rated load Resistive load 5 A at 250 VAC 5 A at 30 VDC Maximum switching capacity: 1,250 VA, 150 W Minimum load: 5 VDC, 10 mA (reference values) Mechanical life: 10 million operations min. Electrical life: 5 A at 250 VAC or 30 VDC: 50,000 operations 3 A at 250 VAC/30 VDC: 100,000 operations
Sampling cycle		100 ms
Insulation resistance		20 MΩ (at 500 V) between charged terminals and exposed uncharged parts 20 MΩ (at 500 V) between any charged terminals (i.e., between input, output, and power supply terminals) 20 MΩ (at 500 V) between contacts (open)
Dielectric strength		2,300 VAC, 50/60 Hz for 1 min between terminals of different charge
Vibration resistance		Frequency: 10 to 55 Hz, 0.35-mm single amplitude 10 sweeps of 5 min each in X,Y, and Z directions
Shock resistance		100 m/s², 3 times each in 6 directions along 3 axes
Weight		Approx. 160 g
Degree of protection		IP20
Memory protection		Non-volatile memory (number of writes: 1 million)
Safety Standards	Approved standards	UL 61010-1 Installation environment (pollution level 2, installation category II)
	EMC	EN 61326-1 Industrial electromagnetic environment
	Application standards	UL 61010-1 (Recognition), Korean Radio Waves Act (Act 10564), CSA: C22.2 No.14, CCC: GB14048.5
Terminal screw tightening torque		0.49 to 0.59 N·m
Crimp terminals		Two solid wires of 2.5 mm² or two ferrules of 1.5 mm² with insulation sleeves can be tightened together.
Case color		N1.5
Case material		PC and ABS, UL 94 V-0
Mounting		Mounts to DIN Track.
Dimensions		22.5 × 100 × 90 mm (W × D × H)

Setting Ranges

K8AK-TH11S

Centigrade

Fahrenheit

K8AK-TH12S

Centigrade

Fahrenheit

Temperature Input Range

TH11S	°C		°F
Input type	Lower limit	Upper limit	Lower limit	Upper limit
K	-20	1019	-40	1039
J	-20	870	-40	1039
T	-20	420	-40	740
E	-20	620	-40	1039
Pt100	-20	870	-40	1039
Pt1000	-20	870	-40	1039

TH12S	°C		°F
Input type	Lower limit	Upper limit	Lower limit	Upper limit
K	-20	1320	-40	2340
J	-20	870	-40	1540
T	-20	420	-40	740
E	-20	620	-40	1140
B	0	1820	0	3240
R	-20	1720	-40	3040
S	-20	1720	-40	3040
PLII	-20	1320	-40	2340

last update: April 3, 2017

Temperature Monitoring Relay

K8AK-TH

Track Mounting Products (Sold Separately)

DIN Tracks
PFP-100N
PFP-50N

* Dimensions in parentheses are for the PFP-50N.

TITLE	DOCUMENT TYPE	SIZE
K8AK-TH	Catalog	1092 KB

Ratings

Characteristics

Setting Ranges

K8AK-TH11S

Centigrade

Fahrenheit

K8AK-TH12S

Centigrade

Fahrenheit

Temperature Input Range

Temperature Monitoring Relay

K8AK-TH

Track Mounting Products (Sold Separately)

DIN Tracks
PFP-100N
PFP-50N

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Ratings

Characteristics

Setting Ranges

K8AK-TH11S

Centigrade

Fahrenheit

K8AK-TH12S

Centigrade

Fahrenheit

Temperature Input Range

Temperature Monitoring Relay

K8AK-TH

Track Mounting Products (Sold Separately)

DIN Tracks PFP-100N PFP-50N

DIN Tracks
PFP-100N
PFP-50N