The OMRON E5AC-RX3ASM-800 is a high-performance digital temperature controller from Omron’s acclaimed E5AC series. Designed for a wide range of industrial applications, this 96 x 96 mm (1/4 DIN) controller combines precision, advanced functionality, and an exceptionally clear display for improved process monitoring and control.
Key Features & Benefits
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Large, High-Visibility Display: Features a large white PV (Process Value) display that is significantly easier to read, even from a distance, enhancing operator efficiency and reducing errors.
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High-Speed Sampling: With a sampling period of just 50 ms, the controller provides fast and accurate responses to temperature changes, ensuring tight process control.
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Compact and Versatile Design: The main body has a shallow depth of only 60mm, making it suitable for installation in space-constrained panels.
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Multiple Input and Output Options: This model supports a wide variety of thermocouple (B, E, J, K, L, N, R, S, T, U, W, PLII), RTD, and analog inputs, offering flexibility for diverse applications. It features a relay control output, three auxiliary outputs, and supports advanced control modes like heating/cooling and PID control with auto-tuning.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Omron Automation |
| Model | E5AC-RX3ASM-800 |
| Series | E5AC |
| Size | 96 x 96 mm (1/4 DIN) |
| Supply Voltage | 100 to 240 VAC |
| Control Output 1 | Relay output |
| Auxiliary Outputs | 3 alarm relay outputs |
| Input Type | Universal (Thermocouple, RTD, Analog) |
| Control Method | ON/OFF or 2-PID Control with Auto-Tuning |
| Sampling Period | 50 ms |
| Display Type | 11-segment digital display with large white PV characters |
| Terminal Style | Screw terminal block |
| Ingress Protection | IP66 (front panel), IP20 (case), IP00 (terminals) |
Applications
The Omron E5AC-RX3ASM-800 is ideal for various industries, including:
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Industrial Manufacturing: Plastic molding, packaging machinery, and semiconductor equipment.
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Process Control: Heat treatment, environmental chambers, and food processing.
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HVAC and Energy Management.

















