The **W2AC-AZ1A-R2/Q** is a specific model identifier for a **Signal Conditioner / Signal Isolator** manufactured by **M-System** (now part of MG CO., LTD). This specific unit is a dual-output signal conditioner designed for industrial instrumentation. --- ### 1. Part Number Breakdown The part number follows a specific nomenclature used by M-System to define the hardware specifications: | Code Segment | Feature | Description | | :--- | :--- | :--- | | **W2AC** | Model Series | Dual-output Signal Conditioner (Transmitter) | | **AZ** | Input Type | **Potentiometer Input** (100 $\Omega$ to 10 k$\Omega$) | | **1** | Output 1 | **4 – 20 mA DC** (Load resistance 750 $\Omega$ max) | | **A** | Output 2 | **4 – 20 mA DC** (Load resistance 350 $\Omega$ max) | | **R** | Power Supply | **24V DC** (Operational range 24V DC $\pm$10%) | | **2** | Style/Gen | Specific revision or terminal block style | | **Q** | Option | **Special option code** (Requires specific data sheet per customer) | --- ### 2. Functional Description The device acts as an interface between a sensing element (like a slide wire or potentiometer) and a PLC/DCS system. * **Isolation:** Provides 3-way isolation between Input, Output 1, Output 2, and Power. This prevents ground loops and protects sensitive control equipment from electrical surges. * **Signal Conversion:** It takes the variable resistance from a potentiometer and converts it into two independent, standardized linear current loops (4-20mA). * **Mounting:** Designed for standard DIN rail mounting. --- ### 3. Electrical Specifications | Specification | Value | | :--- | :--- | | **Supply Voltage** | 24V DC (approx. 80mA consumption) | | **Input Signal** | 100 $\Omega$ – 10 k$\Omega$ total resistance | | **Accuracy** | $\pm$0.1% of span | | **Response Time** | $\leq$ 0.5 seconds (0 to 90%) | | **Isolation Resistance** | 100 M$\Omega$ at 500V DC | | **Dielectric Strength** | 2000V AC @ 1 minute (Input to Output to Power) | --- ### 4. Connection Diagram (Simplified) ```text [ Potentiometer ] / | \ (CW) (Wiper) (CCW) | | | [ 1 ] [ 2 ] [ 3 ] <-- Input Terminals ---------------------- [ W2AC-AZ1A-R2/Q ] ---------------------- [ 4 ] [ 5 ] <-- Output 1 (4-20mA) [ 6 ] [ 7 ] <-- Output 2 (4-20mA) [ 12] [ 13] <-- Power (24V DC) ``` --- ### 5. Common Use Cases * **Position Sensing:** Translating the physical position of a valve or actuator (via a potentiometer) into a signal for a control room. * **Level Measurement:** Used with float-type level sensors that use a resistance strip. * **Redundancy:** Providing two identical 4-20mA signals to two different devices (e.g., a local display and a remote PLC) from a single sensor.