The OMRON E5AX-A-F is a 1/4 DIN temperature controller engineered for precise thermal regulation across industrial heating and cooling applications. It delivers PID control with automatic tuning of control constants, dual 4-digit LED displays for process and setpoint values, and flexible input compatibility with thermocouples (R/S/K/J/T/E/B/N/L/U) and platinum resistance thermometers (Pt100/JPt100). This model operates without onboard communications; interchangeable communication boards supporting RS-232C, RS-422, RS-485, and BCD protocols are available as optional upgrades for the E5AX series.
Technical Specifications
• Control Method: PID with auto-tuning
• Sensor Inputs: Thermocouple types R, S, K, J, T, E, B, N, L, U; Pt100 and JPt100 resistance thermometers
• Accuracy: ±0.3% FS ±1 digit (setting and indication); thermocouple-specific accuracies include ±2°C ±1 digit (Type U, –150° to 400°C) and ±3°C ±1 digit (Types R/S, 0° to 200°C)
• Display: Dual 4-digit LED (process variable and setpoint)
• Supply Voltage: 100 to 240 VAC, 50/60 Hz; operating range 85% to 110% of rated voltage
• Power Consumption: 10 to 15 VA (100 to 240 VAC)
• Form Factor: 1/4 DIN, 92 mm panel cutout
• Dimensions: 9.5 cm × 9.5 cm × 11.4 cm
• Weight: 350 g
– Key Features
• Interchangeable control output modules: relay (SPDT, 5 A @ 250 VAC), SSR (SPST-NO, 1 A @ 75–250 VAC), voltage outputs (12 VDC @ 40 mA or 24 VDC @ 20 mA, NPN with short-circuit protection), or current output (4–20 mA DC, 600 Ω load max.)
• Alarm relay output: SPST-NO, 3 A @ 250 VAC
• Heater burnout detection and watchdog timer function (available on selected models)
• Input impedance: 1 MW minimum for voltage input
– Typical Applications
Industrial temperature regulation in furnaces, ovens, reactors, and process heating systems requiring flexible sensor input and modular control output configuration.
– Compatibility & Integration
Accepts interchangeable control output units and optional communication boards. No communications built into this model; communication-equipped variants and upgrade boards are available separately.
