The **M2UDS-FW1-R** is a specific model within the **M2UDS Series** of digital panel meters manufactured by **M-System** (a major Japanese industrial automation component provider). This device is primarily a **Digital Panel Meter** used for monitoring and displaying DC signals in industrial environments. --- ### 1. Key Technical Specifications The "M2UDS-FW1-R" code can be broken down into specific electronic characteristics based on M-System's nomenclature: | Component Feature | Specification | Description | |:---|:---|:---| | **Model Series** | M2UDS | 1/8 DIN Digital Panel Meter (Compact size). | | **Input Type** | **F** (Frequency/Pulse) | Designed to measure frequency or pulse rate signals. | | **Output Type** | **W** (Transistor Output) | Dual Hi/Lo alarm outputs (Open Collector). | | **Power Input** | **1** | 100 – 120V AC Power Supply. | | **Auxiliary Power** | **R** | 24V DC auxiliary power supply for the sensor. | --- ### 2. Core Electronic Functions #### A. Measurement & Display * **Input Scaling:** It converts raw pulse/frequency signals from flow meters, encoders, or proximity switches into readable units (e.g., RPM, Hz, Liters/min). * **Display:** Features a high-visibility 4-digit LED display (typically red). * **Accuracy:** High-precision digital processing to ensure minimal drift over time. #### B. Output Interfaces * **Dual Alarms:** Provides two setpoints (High/Low). When the measured frequency exceeds or falls below these thresholds, the internal transistor outputs trigger. * **Transistor Output:** The "W" designation indicates a NPN open collector output, suitable for interfacing with PLCs or small relays. #### C. Power Management * **Isolation:** The device features galvanic isolation between the input signal, power supply, and output circuits to prevent electrical noise interference and ground loops. * **Excitation Supply:** The "R" suffix indicates the unit provides a regulated 24V DC output to power the external sensor directly, simplifying wiring. --- ### 3. Typical Application Schematic The electronic integration usually follows this logic: ```mermaid graph LR A[Sensor/Frequency Source] -->|Pulse Signal| B[M2UDS-FW1-R] B -->|24V DC| A C[AC Power 120V] --> B B -->|Alarm 1| D[PLC Input/Buzzer] B -->|Alarm 2| E[Control Relay] ``` --- ### 4. Physical Dimensions * **Standard:** 1/8 DIN size. * **Front Panel:** 96mm x 48mm. * **Mounting:** Panel-mount with slide-on clips.