Overview
The Omron E5C2-R20J is a DIN-sized (48×48 mm) analog temperature controller designed for industrial control applications. This 1/16 DIN panel-mount unit combines compact form factor with reliable ON/OFF control, making it ideal for HVAC, refrigeration, and general process heating/cooling systems. The unit features a rotary analog dial for manual setpoint adjustment and thermocouple Type J input for reliable temperature sensing across a 0–200°C (32–392°F) operating range.
Key Features
- Compact 1/16 DIN form factor (48×48 mm) fits standard control panel cutouts with minimal space overhead
- Thermocouple Type J input (Iron vs. Constantan) for applications requiring iron-constantan sensing elements
- ON/OFF relay control output for direct switching of heating/cooling loads via relay contacts
- Analog rotary setting with single-turn dial and pointer; Celsius/Fahrenheit scale markings
- AC100–240V power supply (50/60 Hz); wide voltage range simplifies panel design and global deployment
- Panel mount or socket mount via 8-pin octal base (P3G-08 back socket); optional finger-protection models available
Technical Specifications
- Model: E5C2-R20J (AC100-240V, 0–200°C range)
- Input Type: Thermocouple Type J (0–200°C standard range)
- Control Mode: ON/OFF (no proportional control on -R20J variant)
- Output: Relay contact (switching output)
- Power Supply: AC 100–240 V (50/60 Hz)
- Control Period: Approx. 20 ms (at 50 Hz)
- Temperature Accuracy: ±2% FS (full scale, fixed)
- Power Consumption: Approx. 3.6 VA
- Weight: Approx. 100 g (with flush-mounting adapter)
- Degree of Protection: IEC IP40 (front panel)
- Mounting: Panel mount (flush or semi-recessed); 8-pin octal socket mount option
- Recommended Panel Thickness: 1–4 mm
- Dimensions: 48×48 mm (1/16 DIN)
Typical Applications
The Omron E5C2-R20J is widely deployed in:
- HVAC systems: Boiler hot water temperature control, chiller setpoint management
- Refrigeration units: Cold-storage temperature regulation and alarm setpoints
- Industrial ovens: Process heating where simple ON/OFF control is sufficient
- Water heaters and thermal equipment: Maintaining stable outlet temperatures
- Machine tool coolant systems: Temperature monitoring and cooling activation
Ideal where low cost, compact panel space, and reliable analog setpoint adjustment are priorities.
Compatibility & Replacements
Compatible With
- Standard 1/16 DIN panel cutouts (48×48 mm mounting)
- Omron 8-pin octal sockets (P3G-08 back socket, P2CF-08 front socket)
- Thermocouple Type J sensors and thermocouple extension wire
- AC 100–240 V single-phase power distribution systems (50/60 Hz)
- Direct relay load switching for heating elements and solenoid valves
Replaces / Drop-In Replacement For
- Other Omron E5C2-R20J variants with identical base model number but different temperature ranges (0–300°C, 0–400°C models can interchange mechanically but verify input/output specifications)
- Legacy analog thermostat controllers in similar 1/16 DIN form factor (verify connector type and relay ratings before substitution)
Works With
- Omron connectors: P2CF-08, P2CF-08-E (finger protection), P3G-08 sockets
- Omron protective covers: Y92A-48G (soft), Y92A-48B (hard)
- Standard thermocouple Type J extension cables and connectors
- Industrial relay modules and contactors compatible with 24 VDC or AC relay coil voltages
- HVAC control panels and refrigeration systems using analog ON/OFF setpoint logic
