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 k
Ω
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/s
2
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 mm
2
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)
