The **E5GN-R2T** is a professional-grade digital temperature controller manufactured by **Omron**. It is part of the E5_N series, known for its compact 1/32 DIN size (48 x 24 mm). --- ## 1. Key Electronic Specifications The "R2T" suffix in the model number denotes specific hardware configurations regarding output and input types. | Feature | Specification | | :--- | :--- | | **Input Type** | Multi-input (Thermocouple or RTD) | | **Control Output** | Relay Output (SPST-NO, 250 VAC, 2 A) | | **Auxiliary Outputs** | 2 Alarm points | | **Power Supply** | 100 to 240 VAC, 50/60 Hz | | **Size** | 1/32 DIN (48 x 24 mm) | | **Display** | 4-digit dual display (PV and SV) | --- ## 2. Core Electronic Components ### A. Input Section (Sensor Interface) The E5GN-R2T features a universal input circuit. The electronics can process signals from: * **Thermocouples:** K, J, T, E, L, U, N, R, S, B, W, or PL II. * **Platinum Resistance Thermometers (RTD):** Pt100 or JPt100. * **Internal Circuitry:** Uses a high-precision A/D converter to translate low-voltage analog signals from sensors into digital data for the microprocessor. ### B. Control Output (Relay) The "R" in R2T stands for **Relay**. * It utilizes an internal mechanical relay. * **Capacity:** 250 VAC, 2 A (resistive load). * **Logic:** It operates on a Time-Proportional PID or ON/OFF control cycle. ### C. Processing Unit The unit contains a microprocessor that performs **2-PID control** (Two-degrees-of-freedom PID). This ensures that the system reaches the setpoint quickly without significant overshoot and remains stable during external disturbances. --- ## 3. Terminal Wiring Diagram The electronic connections are located on the rear of the device. Below is a simplified representation of the pin-out functions: | Terminals | Function | Description | | :--- | :--- | :--- | | **1 & 2** | Power Supply | 100-240 VAC input | | **3 & 4** | Control Output | Relay contact (NO) | | **5, 6, 7** | Alarm Outputs | 2 independent alarm circuits | | **8, 9, 10** | Sensor Input | Connect TC (+/-) or RTD (A, B, B) | --- ## 4. Operational Features * **High-Speed Sampling:** The internal electronics sample the input every 250ms. * **Non-Volatile Memory:** Settings (Set Points, PID constants) are stored in EEPROM, so they are not lost during power failure. * **IP66 Rating:** The front panel is electronically sealed against water and dust.