The Selec TC203AX is a compact temperature controller (72 × 72 mm panel size) with PID auto-tuning or ON/OFF control, supporting thermocouple (J, K, T, R, S) and RTD (PT100) inputs, a single setpoint, and relay or SSR outputs. It is widely used in industrial heating, cooling, and process control applications.

Technical Specifications

• Display: 3-digit, 7-segment LED single display (13.5 mm height)
• Inputs:
  • Thermocouples: J, K, T, R, S
  • RTD: PT100
• Control Modes:
  • PID control with auto-tuning
  • ON/OFF control
• Setpoint: Single setpoint, °C/°F selectable
• Outputs:
  • Relay (SPDT):
    • NO: 10A @ 250 VAC / 24 VDC
    • NO/NC: 5A/5A @ 250 VAC / 24 VDC
  • SSR drive: 12 VDC, 50 mA
• Accuracy:
  • J, K, T inputs: ±0.25% of F.S. ±1 °C
  • R, S inputs: ±0.5% of F.S. ±2 °C
  • RTD inputs: ±0.1% of F.S. ±1 °C
• Sampling Time: 250 ms
• Resolution: Fixed 1 °C