The **TZ4M-R2C** is a high-performance PID Temperature Controller manufactured by **Autonics**. It is a dual-display, multi-range device widely used in industrial automation for precise thermal management. --- ## 1. Technical Specifications The part number **TZ4M-R2C** breaks down into specific electronic characteristics: | Parameter | Specification | | :--- | :--- | | **Size** | DIN W72 x H72mm | | **Display** | 4-Digit Dual LED (Process Value & Set Value) | | **Control Output** | Relay Output (250VAC 3A) | | **Power Supply** | 100–240VAC 50/60Hz | | **Alarm Outputs** | Event 1 + Event 2 (Relay outputs) | | **Input Type** | Multi-input (Thermocouples, RTDs, Analog V/mA) | | **Control Method** | PID Control, ON/OFF Control | --- ## 2. Key Electronic Components & Functions ### A. Input Section (Sensor Interface) The unit is versatile because its electronic input stage can handle multiple signal types: * **Thermocouples:** K(CA), J(IC), E(CR), T(CC), R(PR), S(PR), L(IC). * **RTD:** Pt100Ω, Cu50Ω. * **Analog:** 1-5VDC, 0-10VDC, 4-20mADC. ### B. Control Output (Relay) The **"R"** in the model name signifies a **Relay Output**. * Internally, it uses an electromagnetic relay to switch the load. * It is designed for slow-cycling processes (e.g., controlling a contactor for a large heater). * *Note:* If high-speed switching is required (e.g., for an SSR), a different sub-model (TZ4M-14C) would be used. ### C. The PID Algorithm The microprocessor implements a dual-speed PID control system: 1. **High-speed response:** To reach the set point quickly. 2. **Low-speed response:** To minimize overshoot when approaching the target temperature. --- ## 3. Terminal Configuration The back of the TZ4M-R2C features high-quality screw terminals. Below is a generalized mapping: | Terminal Group | Function | | :--- | :--- | | **Power** | AC Input (100-240V) | | **Input** | Sensor connections (+, -, and B' for RTDs) | | **Output** | Main Relay contacts (COM, NO) | | **Event** | Alarm 1 and Alarm 2 relay outputs | --- ## 4. Safety and Protection Features * **IP65 Protection:** The front panel is dust-proof and water-resistant. * **Sensor Break Alarm:** The electronics detect if the thermocouple or RTD wire is severed and trigger an error code (`OPEN`). * **Self-Diagnosis:** Internal checks for memory errors or hardware malfunctions.