User manual for the ZH-42213 network‑enabled 2‑channel analog input module with MODBUS‑RTU communication and high‑precision 24‑bit AD conversion.
The ZH-42213 is a network‑connected 2‑channel analog input module that measures voltage, current, power and cumulative energy on a single‑phase DC circuit. It uses a high‑precision 24‑bit AD chip, offers full isolation, and communicates via standard MODBUS‑RTU over TCP/IP.
The manual provides product overview, model variants, performance specifications, mechanical drawings, wiring diagrams, MODBUS protocol details, register definitions and command examples for configuration and data acquisition. This manual is written in Chinese.
| Accuracy Class | 0.2%FS |
|---|---|
| Current Range | 10 mA – 1 A DC/AC (selectable) |
| Voltage Range | 75 mV – 500 V DC/AC (selectable) |
| Operating Temperature | -20 °C to +70 °C |
| Data Update Interval | 100 ms |
| Isolation Voltage Rating | >2500 V DC |
| Rated Power Consumption | <2 W |
It uses the standard MODBUS‑RTU protocol over TCP/IP, compatible with most SCADA and PLC software.
It can be powered from an external DC supply of 10‑30 V or 10‑55 V, or it can draw power passively from the measured voltage when that voltage is below 55 V.
The isolation voltage rating is greater than 2500 V DC.