The **E5CC-RX2ASM-802** is a high-performance digital temperature controller manufactured by **Omron**. It belongs to the E5CC series, known for its compact design (48x48mm) and high-visibility white LCD display. Below is a breakdown of the electronic components, specifications, and terminal logic for this specific model. --- ### 1. Model Code Breakdown Understanding the specific electronic capabilities based on the model suffix: | Code Segment | Meaning | Specification | | :--- | :--- | :--- | | **E5CC** | Series Name | Digital Temperature Controller (48 x 48 mm) | | **RX** | Control Output | **Relay Output** (SPST-NO, 250 VAC, 3 A) | | **2** | Auxiliary Outputs | **2 Independent Auxiliary Outputs** (Relays) | | **A** | Power Supply | **100 to 240 VAC** (Universal AC Input) | | **S** | Terminal Type | **Screw Terminal Blocks** | | **M** | Option Tool | **Multi-input** (Supports Thermocouples, RTDs, and Analog) | | **802** | Special Code | Typically indicates **RS-485 Communications** (Modbus RTU) | --- ### 2. Key Electronic Specifications #### A. Input Section (Multi-Input) The internal circuitry includes a high-speed A/D converter capable of processing various sensor types: * **Thermocouples:** K, J, T, E, L, U, N, R, S, B, W, or PL II. * **Platinum Resistance Thermometers (RTD):** Pt100 or JPt100. * **Analog Inputs:** 4 to 20 mA, 0 to 20 mA, 1 to 5 V, 0 to 5 V, or 0 to 10 V. * **Sampling Period:** 50 ms (very high speed for precise control). #### B. Output Circuitry * **Control Output (Relay):** A mechanical relay rated at 250 VAC / 3 Amps. Suitable for driving contactors. * **Auxiliary Outputs:** Two SPST-NO relays rated at 250 VAC / 3 Amps. Usually used for High/Low temperature alarms. * **Communication:** Includes an **RS-485** transceiver for industrial networking. #### C. Power and Isolation * **Isolation:** The unit features galvanic isolation between the power supply, input terminals, and output terminals to prevent electrical noise interference. * **Power Consumption:** Approximately 5.2 VA at 100-240 VAC. --- ### 3. Connection Terminal Layout The electronics are accessed via the rear screw terminals: | Terminal No. | Function | Description | | :--- | :--- | :--- | | **1 & 2** | Control Output | Relay Output (Contact) | | **3 & 4** | Auxiliary 1 | Alarm/Event Output 1 | | **5 & 6** | Auxiliary 2 | Alarm/Event Output 2 | | **11 & 12** | Power Supply | 100-240 VAC Input | | **13, 14, 15** | Communication | RS-485 (B+, A-, COM) | | **22, 23, 24** | Sensor Input | Terminals for Thermocouple, RTD, or Analog | --- ### 4. Technical Features * **PID Control:** Uses Omron's 2-PID control algorithm for stability and fast response. * **Auto-tuning:** Built-in logic to automatically calculate the Proportional, Integral, and Derivative constants. * **Display:** Large white PV (Process Value) display for readability under industrial lighting.