1. Introduction
This manual provides essential information for the safe and correct installation, operation, and maintenance of the Omron E5CC-RX2ASM-800 Digital Temperature Controller. Please read this manual thoroughly before using the product to ensure optimal performance and prevent potential hazards. Keep this manual in a safe place for future reference.
2. Safety Precautions
Observe the following safety precautions to prevent electric shock, fire, or injury.
- Electrical Safety: Ensure all wiring is performed by qualified personnel in accordance with local electrical codes. Disconnect power before wiring or performing maintenance.
- Proper Use: Use the controller within its specified voltage, current, and temperature ranges. Do not use in environments with flammable or explosive gases.
- Installation: Mount the controller securely to prevent it from falling. Ensure adequate ventilation to prevent overheating.
- Maintenance: Do not disassemble, repair, or modify the controller. Contact Omron service personnel for repairs.
3. Product Overview
The Omron E5CC-RX2ASM-800 is a high-performance digital temperature controller designed for precise temperature regulation in various industrial applications. It features a clear LCD display, multiple input types (Pt100, Thermocouple, Analog), and relay control outputs, making it versatile for different control needs.

Figure 1: Front view of the Omron E5CC-RX2ASM-800 Digital Temperature Controller, showing the display and control buttons.
4. Setup
4.1. Mounting
The E5CC-RX2ASM-800 is designed for panel mounting. Ensure the panel cutout dimensions match the controller's specifications. Insert the controller into the cutout and secure it using the provided mounting brackets. Allow sufficient space around the controller for ventilation and wiring access.
4.2. Wiring
All wiring must be done with the power supply disconnected. Refer to the wiring diagram provided with the product for specific terminal connections. Use appropriate wire gauges for power and load connections.
- Power Supply: Connect 100-240VAC to the designated power terminals.
- Input: Connect your temperature sensor (Pt100, Thermocouple) or analog input to the input terminals. Ensure correct polarity for thermocouples.
- Control Output: Connect your heating/cooling element or other controlled device to the relay control output terminals.
- Alarm Outputs: Connect external alarm indicators or devices to the two relay alarm output terminals as required.
5. Operating Instructions
5.1. Basic Operation
Once powered on, the controller's display will show the Process Value (PV) and Set Value (SV). The PV indicates the current measured temperature, while the SV is the target temperature you wish to maintain.
5.2. Setting Parameters
To change the Set Value (SV) or other operating parameters, follow these general steps:
- Press the Mode or Level button to enter the parameter setting mode.
- Use the Up and Down arrow buttons to navigate through parameters.
- Press the Set or Enter button to select a parameter for editing.
- Use the Up and Down arrow buttons to adjust the value.
- Press Set or Enter again to confirm the new value.
- Exit the parameter setting mode by pressing the Mode or Level button repeatedly until the normal operating display returns.
Refer to the detailed parameter list in the full product manual for specific parameter codes and their functions.
6. Maintenance
Regular maintenance ensures the longevity and accuracy of your temperature controller.
- Cleaning: Periodically clean the display and front panel with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Inspection: Regularly check wiring connections for looseness or damage. Inspect the controller for any signs of physical damage or overheating.
- Environmental Conditions: Ensure the operating environment remains within specified temperature and humidity ranges to prevent malfunction.
7. Troubleshooting
If you encounter issues with your E5CC-RX2ASM-800, refer to the following common problems and solutions:
- No Power: Check power supply connections and ensure the voltage is within the specified range (100-240VAC). Verify circuit breakers or fuses.
- Incorrect Temperature Reading (PV): Verify the sensor type setting matches the connected sensor. Check sensor wiring for correct polarity and secure connections. Ensure the sensor is properly installed in the process.
- Control Output Not Activating: Check the control output wiring. Verify that the SV is set correctly and that the control mode (e.g., heating/cooling) is appropriate for your application. Check alarm settings if they are interfering.
- Display Error Code: Consult the comprehensive product manual for a list of error codes and their corresponding solutions.
If the problem persists after attempting these solutions, contact Omron technical support.
8. Specifications
| Specification | Value |
|---|---|
| Brand | Omron |
| Model Number | E5CC-RX2ASM-800 |
| Power Source | Corded Electric |
| Voltage | 100-240VAC (as per description), 240 Volts (as per specifications) |
| Input Type | Pt100/Thermocouple/Analog |
| Control Output | Relay + 2 Relay Alarm Outputs |
| Display Type | LCD |
| Control Method | Remote (as per specifications, though typically PID/ON-OFF for temperature controllers) |
| Mounting Type | Wall Mount (Panel Mount is typical for this model) |
| Item Weight | 0.01 Ounces |
9. Warranty and Support
Omron products are manufactured to high-quality standards. For information regarding warranty terms and conditions, please refer to the documentation included with your purchase or visit the official Omron website. For technical assistance, troubleshooting, or service, please contact Omron customer support directly. Ensure you have your model number (E5CC-RX2ASM-800) available when seeking support.







