FE250 / FE251 / FE300 Rail-Mount PID Controller | Compact Modbus Process Control

Compact DIN Rail PID Controllers for Multi-Point Process Control

The FE250, FE251, and FE300 are space-saving, DIN-rail mount PID controllers built for precision control, compact integration, and Modbus RTU communication. Designed for multi-point systems such as HVAC, packaging, ovens, and distributed industrial panels, these controllers deliver ±0.1% accuracy, 50 ms sampling, and flexible analog/relay/SSR outputs.

Models differ by terminal type (plug-in or fixed) and additional output/alarm capacity. All versions support universal voltage, Modbus RS-485, and custom I/O combinations.

Key Features

• Input Types:
  • Thermocouples (K, J, R, S, B, E, N, T, W, PLII, L)
  • RTD (Pt100)
  • Linear: 0–20 mA, 4–20 mA, 0–10 V, 1–5 V, 2–10 V, etc.
• Outputs (configurable):
  • Relay, SSR Drive, Analog 4–20 mA / 0–10 V
  • 1–2 Alarms (AL1, AL2)
  • Remote SV, TRS, and retransmission functions available
• Control Modes:
  • ON-OFF, P, PI, PID
  • Auto-Tuning and Super SV for precision ramping
• Sampling Time: 50 ms
• Accuracy: ±0.1%
• Communication:
  • RS-485 (Modbus RTU / TAIE protocol)
  • Baud rates: up to 115200 bps
• Power Supply:
  • AC 85–265 V
  • Optional DC 24 V
• Mounting:
  • DIN rail (rail-mount type)
  • Plug-in terminals (FE251), fixed terminals (FE300)

Models