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KT2 Temperature Controllers

Your Simple, Accurate and Economical Temperature Controller Compact temperature controller (DIN 48 x 24) that can support pattern control

UL/C-UL , CE Approved

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Nine step pattern control possible.

Despite DIN 48 x 24 size, selection is possible of control with fixed set point and nine step pattern control.


Versatile thermocouple, RTD, DC voltage and DC current input for temperature detecting sensors.

Simple operation enables highly accurate temperature control

All required operations can be enabled by the front keys and highly accurate PID control mode ensures an input span of ±0.2%.

Meets market demands for cost-effectiveness

The KT series offers both economy and high performance.

The KT series complies with UL, CSA standards and CE marking.

Communication specification uses RS485 and Modbus protocol

(Sample System Configulation)
FPSIGMA Programmable Controller
(Panasonic Industrial Devices SUNX)


* In the configuration above, the FPsigma requires a communication cassette (FPG-COM3).
* Modbus is a communication protocol developed for PLCs by Modicon Inc.



Display Specifications
Size 48×24mm
Rating Supply voltage (Must be specified) 100 to 240V AC
Frequency 50/60Hz
Power consumption Approx. 5VA
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 250V AC (Resistiveload), 1a 1A 250V AC (Inductive load cos φ=0.4)
Alarm output 2 Open collector 0.1A 24V DC
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 Primary setting/secondary setting 
(switched by external terminal)
Program control function 1 pattern, 9 step setting is possible
(However,make function selection setting of either control with fixed set point or program control.)
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 For sensor input range and DC current,DC voltage 0.0 to 110.0%
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 1 min between input terminal and power 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. 120g
Waterproof IP66 (applicable only to the front panel subject to rubber gasket employed)
Display character height PV: 8.7mm, SV: 8.7mm (PV/SV switching display)
Options Heating/Cooling control
(Relay contact material:silver alloy)
Relay contact:
1a 3A 250V DC
(Resistive load)
Heater burn-out alarm output
(Relay contact material:silver alloy)
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 type Half-duplex
Communication speed Select 2400, 4800, 9600, or 19200 bps using key operation.
Synchronization type Asynchronous
Protocol Modbus
Coding ASCII
Error correcting Command re-send
Error detection Parity check, check sum
Data structure Start bit: 1 Data bit: 7 Parity: Even parity Stop bit: 1
Interface RS485 compliant
No. of nodes 31
Maximum cable length 1,000 m (cable resistance must be within 50Ω

*That main setting No. 2 will not be possible on the KT8 and KT9 when the communications functions is added.