Omron E5AX-A20 | Omron Temperature Controller

Description The Omron E5AX‑A20 is a compact but full-featured ¼ DIN temperature controller, ideal for industrial and process applications. Technical Specifications Condition New/Never Used Surplus Brand Omron Category Controls & Indicators Part Number E5AX-A20 Subcategory Temperature/Process Control Range Standard Range Mounting Size 1/4 DIN Communication Type BCD Communications Display (PV) 4-digit LED Display (SV) 4-digit LED Supply Voltage 100–240 VAC Frequency 50/60 Hz Power Consumption 15 VA Weight 1.05 lbs Information About E5AX-A20 The E5AX-A20 is a discontinued temperature controller from Omron, engineered for use in industrial process control and thermal regulation systems. It offers PID-based precision temperature management and supports modular I/O configurations via plug-in output units. While it is no longer in production, the E5AX-A20 remains widely available through surplus and refurbished industrial automation suppliers. Key Features: Omron Engineered: Originally manufactured by Omron for factory automation and process control applications. Dual LED Display: Equipped with 4-digit LED screens for both process value (PV) and setpoint value (SV), providing real-time monitoring. PID Control: Utilizes auto-tuned Proportional-Integral-Derivative control algorithms for stable and responsive thermal regulation. BCD Communication: Supports binary-coded decimal (BCD) communication for integration with digital host systems. 1/4 DIN Mounting: Standard 48×48 mm housing ideal for panel-mount installations in compact or dense environments. Wide Power Range: Operates on 100–240 VAC at 50/60 Hz with 15 VA power consumption, ensuring compatibility across systems. Discontinued Model: Production ceased in 2003, but replacement units remain available in the aftermarket sector. Field Configurable: Supports multiple input types including thermocouples and RTDs, selected via DIP switch settings. Refurbished Availability: Commonly sold by industrial parts vendors in tested and warranty-covered condition. Legacy System Support: Frequently used to maintain or retrofit older process control setups dependent on Omron controllers. The E5AX-A20 continues to provide reliable temperature regulation in legacy systems requiring standardized displays, modular I/O, and robust PID functionality. Its enduring utility makes it a practical solution for retrofit projects and legacy equipment maintenance.