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KT4 Temperature Controllers (Discontinued Products)

Rating/ Performance

Rating And Specifications

Display Specifications
KT4
Size 48×48mm
Rating Supply voltage (Must be specified) 100 to 240V AC
24V AC/DC
Frequency 50/60Hz
Power consumption Approx. 8VA
Rated scale Input type Input range
Thermocouple K -200 to 1370°C(-320 to 2500 ℉)
-199.9 to 400.0°C(-199.9 to 750.0 ℉)
J -200 to 1000°C(-320 to 1800 ℉)
R 0 to 1760°C(0 to 3200 ℉)
S 0 to 1760°C(0 to 3200 ℉)
B 0 to 1820°C(0 to 3300 ℉)
E -200 to 800°C(-320 to 1500 ℉)
T -199.9 to 400.0°C(-199.9 to 750.0 ℉)
N -200 to 1300°C(-320 to 2300 ℉)
PL-II 0 to 1390°C(0 to 2500 ℉)
C(W/Re5-26) 0 to 2315°C(0 to 4200 ℉)
RTD Pt100 -200 to 850°C(-300 to 1500 ℉)
-199.9 to 850.0°C(199.9 to 999.9 ℉)
JPt100 -200 to 500°C(-300 to 900 ℉)
-199.9 to 500.0°C(-199.9 to 900.0 ℉)
DC Current 4 to 20mA DC -1999 to 9999, -199.9 to 999.9 -19.99 to 99.99, -1.999 to 9.999
0 to 20mA DC
DC Voltage 0 to 1V DC
0 to 10V DC
1 to 5V DC
0 to 5V DC
· Scaling and change to the decimal point position is possible for DC current and DC voltage input.
· DC current input is supported with an externally mounted 50Ω shunt resistor (sold separately).
Multi-input Thermocouple K, J, R, S, B, E, T, N, PL-II, C (W/Re5-26)
External resistor: Max. 100Ω (max. 40Ω external resistor for B input)
RTD PT100, JPt100 3-conductor system (Allowable input conductor resistance for each conductor: max. 10Ω)
DC current 0 to 20 mA DC, 4 to 20 mA DC
Input impedance: 50Ω (Connect 50Ω shunt resistor between input terminals.)
Allowable input current: max. 50 mA (when 50Ω shunt resistor is used)
DC voltage · 0 to 1V DC
Input impedance: min. 1 MΩ, Allowable input voltage: max 5 V, Allowable signal source resistance: max. 2 kΩ
· 0 to 5 V DC, 1 to 5 V DC, 0 to 10 V DC
Input impedance: min. 100 kΩ, Allowable input voltage: max 15 V, Allowable signal source resistance: max. 100Ω
Control output
(Must be specified)
Relay contact(contact material:sliver alloy) 1a
1a 3A 250V AC (Resistive load),1a 1A 250V AC (Inductive load cosØ=0.4), Electric life: 100,000 times
Non-contact DC voltage 12+20 V DC, Max. load current: 40mA (Short-circuit protected)
DC current 4 to 20mADC Load resistance: Max. 550Ω
Alarm output 1 Relay contact 1a 3A 250VAC (Resistive load)
Electric life: 100,000 times
Alarm output 2 The same as the one of Alarm output 1
Control mode Actions mentioned below can be selected by key operation.
[Default PID] PID (with auto-tuning function), PI, PD (with manual reset function), P (with manual reset function), ON/OFF action
Target temperature setting -
Program control function -
Accuracy Thermocouple Within ±0.2% ±1 digit of each input span or within ±2°C (4℉) whichever is greater
However, R and S input; Within ±6°C (12℉) in the range of 0 to 200°C (0 to 400℉)
B input 0 to 300°C (0 to 600℉): Accuracy is not guaranteed.
K, J, E, and N input less than 0°C (32℉): Within ±0.4% ±1 digit of input span
RTD Within ±0.1% ±1 digit of each input span or ±1°C (2℉) whichever is greater
DC current and DC voltage Within ±0.2% ±1 digit of each input span
Sampling period 250ms
Hysteresis Thermocouple and RTD: 0.1 to 100.0°C ()
DC current and DC voltage: 1 to 1000 (The decimal point place follows the selection)
Proportional band Thermocouple: 0 to 1000℃ (0 to 2000 ℉) RTD: 0.0 to 999.9℃ (0.0 to 999.9 ℉) DC current and DC voltage: 0.0 to 100.0%
Integral time 0 to 1000 seconds
Derivative time 0 to 300 seconds
Proportional cycle 1 to 120 seconds
Allowable voltage fluctuation When 100 to 240V AC; 85 to 264V AC When 24V AC/DC; 20 to 28V AC/DC
Insulated resistance 500V DC 10MΩ or greater
Breakdown voltage 1.5kV AC for 1min between input terminal and ground terminal,
between input terminal and power terminal
between power terminal and ground terminal
between output terminal and ground terminal, and between output terminal and power terminal
Malfunction vibration 10 to 55 Hz (1 cycle/min.), single amplitude: 0.35 mm 0.014 in (10 min. on 3 axes)
Breakdown vibration 10 to 55 Hz (1 cycle/min.), single amplitude: 0.75 mm 0.030 in (1 hour on 3 axes)
Malfunction shock X, Y and Z each direction for 5 times 10G
Breakdown shock Same as above, but 30G
Ambient temperature 0 to 50°C
Ambient humidity 35 to 85%RH (No condensation)
Mass Approx. 130g
Waterproof IP66 (applicable only to the front panel subject to rubber gasket employed)
Display character height PV:10.2mm SV:8.8mm
Options Heating/Cooling control
(Relay contact material:silver alloy)
Non contact relay 0.3A 250V AC
(Resistive load)
Heater burn-out alarm output
(Relay contact material:silver alloy)
Heater rated current must be selected from 5A, 10A, 20A and 50A.
Setting accuracy: Within 5% of heater rated current
Relay contact 1a 250V AC 3A (Resistive load), Electric life: 100,000 times
Communication function RS-485/Modbus Protocol
(Modbus is a communication protocol developed for PLCs by Modicon Inc.)
Communication speed: 2400/4800/9600/19200bps
Accessories Mounting frame Included with unit
Terminal cover Sold separatel

Communication Function Overview

Item Specification
Communication method Half-duplex
Communication speed Select 2,400, 4,800, 9,600, or 19,200 bps using key operation.
Synchronization type Asynchronous
Protocol Modbus
Coding ASCII
Error correcting Parity check and check sum
Error detection Parity check, check sum
Data structure Start bit: 1 Data bit: 7 Parity: Even parity Stop bit: 1
Interface EIA RS-485 compliant
No. of nodes 31
Maximum cable length 1,000 m 3,280.840 ft(cable resistance must be within 50Ω

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