The **M2UDS2-K2-R2/N** is a specific model within the **M2UDS2 series**, which consists of high-performance digital panel meters/indicators designed for industrial automation and monitoring. These devices are typically used to measure and display DC voltage or current signals. --- ### 1. Part Number Breakdown Understanding the specific electronic characteristics requires decoding the suffix codes: | Code Segment | Description | Specific Detail for this Model | | :--- | :--- | :--- | | **M2UDS2** | Series Name | 1/8 DIN Digital Panel Meter | | **K2** | Input Type | **DC Current (mA)** (Standard range 4-20mA) | | **R2** | Output Type | **Relay Contact Output** (Typically 2-point SPST) | | **N** | Power Supply | **100-240V AC** (Universal power input) | --- ### 2. Electronic Specifications The internal circuitry of this unit is designed for precision and isolation. Below are the core electronic parameters: #### **Input Section** * **Measurement Range:** Typically handles 4 to 20 mA DC or 0 to 20 mA DC. * **Input Impedance:** Usually around 50 $\Omega$ for current inputs. * **A/D Conversion:** High-resolution dual-slope integration or Sigma-Delta conversion to ensure stability against noise. #### **Output Section (Relay)** * **Contact Rating:** 250V AC @ 3A or 30V DC @ 3A (Resistive load). * **Function:** Programmable high/low alarms (H, L, HH, LL modes). #### **Display & Processing** * **Display Type:** 4-digit Red LED (typically 14.2mm height). * **Accuracy:** $\pm$0.1% of FS $\pm$1 digit. * **Sampling Rate:** Approximately 2.5 to 5 times per second. --- ### 3. Wiring and Terminals The device utilizes a screw-terminal block on the rear for electronic connections: | Terminal Group | Function | Connection Note | | :--- | :--- | :--- | | **Power (N)** | L, N, G | Connect to 100-240V AC source. | | **Input (K2)** | (+) and (-) | Connect to the 4-20mA sensor loop. | | **Relay (R2)** | COM, NO | Used to trigger external sirens or PLCs. | --- ### 4. Key Electronic Features * **Galvanic Isolation:** The unit provides high-voltage isolation between the power supply, input signal, and relay outputs to prevent ground loops. * **Scaling:** The 4-20mA input can be electronically scaled to represent physical units (e.g., 0 to 100.0 PSI or °C). * **Digital Filtering:** Built-in software filters to stabilize readings in environments with high electromagnetic interference (EMI). ---