The document describes a 3-phase multifunction power indicator with high accuracy, various display functions, and multiple measurement parameters, suitable for displaying the main electrical variables.
The WM12-DIN is a 3‑phase multifunction power and energy meter designed for DIN‑rail mounting. It measures instantaneous variables such as active, reactive and apparent power, power factor, voltage, current and frequency, and displays them on a 3×3 digit alphanumeric display.
The device offers optional RS485/RS422 serial output, programmable keypad settings, and a range of power‑supply options (24 V, 48 V, 115 V, 230 V, 50‑60 Hz). It complies with IEC safety standards, features an IP40 front protection degree, and includes detailed wiring diagrams for both power and serial connections.
| Accuracy | ±0.5% FS (current/voltage) |
|---|---|
| Display | 3×3 digit alphanumeric |
| Power supply options | 24 V, 48 V, 115 V, 230 V, 50‑60 Hz |
| Front protection degree | IP40 |
| Sampling rate | 1400 samples/s @ 50 Hz (voltage), 1700 samples/s @ 60 Hz (current) |
| Current input range | 0.25 A to 6 A |
| Voltage input range | 185 V to 460 V (unbalanced load) |
| Power consumption (AC) | 4.5 VA |
| Weight | Approx. 400 g |
| Dimensions (W×H×D) | 107.8 mm × 80 mm × 64.5 mm |
The device provides an accuracy of ±0.5% of full scale for both current and voltage measurements.
It can be linked via an RS485 serial connection using a 4‑wire cable as shown in the serial port wiring diagram.
The front panel is rated IP40.
The unit can operate from 24 V, 48 V, 115 V or 230 V at 50‑60 Hz.