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K8DT-TH

Temperature Monitoring Relay

K8DT-TH

Our Value Design Products Increase the Value of Your Control Panels. Ideal to prevent heater overheating. Self-latching output to contribute to safe equipment operation.

Ratings

Power supply
voltage
K8DT-TH[][]D: 24 VAC 50/60 Hz or 24 VDC
K8DT-TH[][]A: 100 to 240 VAC 50/60 Hz
Allowable voltage
range
85% to 110% of power supply voltage
Power
consumption
24 VAC or 24 VDC: 2.1 VA max. or 1.2 W max.
100 to 240 VAC: 3.1 VA max.
Rated insulation
voltage
253 VAC
Sensor
inputs
K8DT-TH1 Thermocouple: K, J, T, E;
Platinum-resistance thermometer: Pt100, Pt1000
K8DT-TH2 Thermocouple: K, J, T, E, B, R, S, PL II
Setting method Set of three rotary DIP switches
Indicators Power (PWR): Green,
Alarm (ALM): Red
Output form Relay Output: SPDT contact
Transistor Output: 1
Output relay
ratings
Rated load
5 A at 250 VAC (Resistive load)
5 A at 30 VDC (Resistive load)
1 A at 250 VAC (Inductive load)
0.2 A at 48 VDC (Inductive load)
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
Transistor output
ratings
Rated voltage: 24 VDC (maximum voltage: 26.4 VDC)
Maximum current: 50 mA DC
Ambient operating
temperature
-20 to 60°C (with no condensation or icing)
Storage
temperature
-25 to 65°C (with no condensation or icing)
Ambient operating
humidity
25% to 85% RH (with no condensation)
Storage humidity 25% to 85% RH (with no condensation)
Altitude 2,000 m max.
Applicable wires Stranded wires, solid wires, or ferrules
Applicable wire
size
0.25 to 1.5 mm2 (AWG24 to AWG16)
Wire insertion force 8 N max. for AWG20 wire
Screwdriver
insertion force
15 N max.
Wire stripping
length
8 mm
Ferrule length 8 mm
Recommended flatblade
screwdriver
XW4Z-00B (Omron)
SZF 0.4 × 2.5 (Phoenix Contact)
210-719 (Wago)
SDI 0.4 × 2.5 × 75 (Weidmuller)
Current capacity 10 A (per pole)
Number of
insertions
50 times
Case color N1.5
Case material PC, UL 94 V-0
Weight Approx. 100 g
Mounting Mounts to DIN Track, or screw mounting
Dimensions 17.5 × 90 × 90 mm (W×D×H)

Specifications

Measurement
accuracy
K8DT-TH1[][]: ±1% of the setting range or ±4 °C, whichever is larger.
K8DT-TH2[][]: ±1% of the setting range (±1%FS).
Hysteresis width 2°C
Sampling cycle 100 ms
Applicable
standards
Approved
standards
EN 61010-1
Installation environment: Overvoltage category II, pollution level 2
EMC EN 61326-1 *
Safety
standards
UL 61010-1 (Listing)
Korean Radio Waves Act (Act 10564)
Insulation resistance 20 MΩ min.
Between all external terminals and the case
Between all power supply terminals and all input terminals
Between all power supply terminals and all output terminals
Between all input terminals and all output terminals
Dielectric strength 3,000 VAC for 1 min
Between all external terminals and the case
Between all power supply terminals and all input terminals
Between all power supply terminals and all output terminals
Between all input terminals and all output terminals
Impulse withstand
voltage
6 kV (between live terminals and exposed, non-charged metal parts)
Noise immunity Square-wave noise of 1 μs/100 ns pulse width with 1-ns rise time
100 to 240 VAC: 1,500 V power supply terminal common/normal mode
24 VAC: 1,500 V power supply terminal common/normal mode
24 VDC: 480 V power supply terminal common
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
Degree of protection Terminals: IP20

* Industrial Electromagnetic Environment (EN/IEC 61326-1, Table 2)

Setting Ranges

K8DT-TH1

Centigrade

K8DT-TH Specifications 6

Fahrenheit

K8DT-TH Specifications 7

K8DT-TH2

Centigrade

K8DT-TH Specifications 9

Fahrenheit

K8DT-TH Specifications 10

Temperature Input Range

K8DT-TH1 °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

K8DT-TH2 °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
PL II -20 1320 -40 2340