TLK72 Controller with programmable input

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TLK 72 is a “single loop” digital microprocessor-based controller, with ON/OFF, Neutral Zone ON/OFF, PID single action, PID dual action (direct and reverse) control and with AUTO-TUNING FAST function, SELF-TUNING function and automatic calculation of the FUZZY OVERSHOOT CONTROL parameter for PID control. The PID control has a particular algorithm with TWO DEGREES OF FREEDOM that optimises the instrument’s features independently in the event of process disturbance and Set Point variations. Furthermore, the instrument allows for one digital input and RS485 serial communication using MODBUS-RTU communication protocol and a transmission speed up to 38.400 baud. The process value is visualized on 4 red displays, while the output status is indicated by 3 LED displays. The instrument is equipped with a 3 LED programmable shift indexes . The instrument provides for the storage of 4 Set Points and can have up to 3 outputs: relay type or can drive solid state relays type (SSR).


  • 72x72 mm panel mount controller with single display
  • 1 probe input
  • up to 4 digital outputs
  • Optionals: 1 digital input and RS485 serial port

Process inputs:
1 input for temperature probes:
TC type: J, K, S
IR probes (J, K type)
PTC KTY81-121 (990 Ω @ 25 °C)
NTC 103AT-2 (10KΩ @ 25 °C)
Voltage (mV) signals :0...50 mV, 0...60 mV,
   12 ...60 mV
Voltage (V) signals :0..1V, 0/1...5V, 0/2...10V
Current (mA) signals (shunt): 0/4...20 mA
1 Digital Input
- Free voltage

Process outputs:
Up to 3 digital outputs according to the model selection:
- Relays SPST-NO (8 A-AC1,3 A-AC3 / 250 VAC)
- SSR drive voltage output (8mA/ 8VDC)

Power supply:
- 24 VAC/VDC
- 100... 240 VAC ±10%
Frequency: 50/60 Hz
Auxiliary power supply for external transmitters (optional):
- 10 VDC / 20 mA Max.

Control functions:
Control strategies :
ON/OFF with neutral zone
PID single or double action (Heat/Cool)
  with two degrees of freedom alghoritm
- SELF-TUNING function
- FUZZY OVERSHOOT CONTROL automatic calculation
Soft start
Bumpless ramp for set point change
Up to 3 configurable alarms + loop break alarm
Total Accuracy: ± 0,5 % fs

Communication and configuration:
- Communication on TTL port to:
  * Universal programming key
    for PC configuration
  * Remote display

72x72 mm, depth 97 mm
- 2,5 mm² screw terminals block
IP54 front frame protection, with gasket
1 red display with 4 digits, height: 14 mm

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“Industrial Technical Services is a single source Instrumentation and Automation company. We provide certified calibrations, PLC programming, custom controls and Panels”.


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