This document introduces the main features and parameters of the CMDF2-16DI RS-485 Modbus RTU user manual, as well as the main purposes and functions of the product.
The CMDF2-16DI is a 16‑channel digital input expansion module for PLCs, DCS, PCS and computers. It communicates via Modbus RTU over RS‑485 and supports both source and sink input types with LED status indicators.
The manual covers the module's technical specifications, installation on a standard U‑rail, wiring diagrams, parameter configuration (manual and software), communication settings, and troubleshooting steps. This manual is written in Chinese.
| Power supply voltage | DC 9‑30 V |
|---|---|
| Maximum power consumption | 1280 mW (excluding input channels) |
| Communication interface | Standard two‑wire RS‑485 (up to 31 modules) |
| Baud rate | 600 ~ 115200 bps selectable |
| Communication format | 7‑8 data bits, parity (odd/even/none), 1‑2 stop bits selectable |
| Maximum transmission distance | <1200 m at 19200 bps |
| Input type | DC 24 V source or sink, 5‑8 mA per channel |
| Number of input channels | 16 |
| Input isolation voltage | 1000 V |
| Dimensions (W × H × L) | 45 mm × 110 mm × 160 mm |
| Weight (without packaging) | 0.31 kg |
| Installation method | Standard U‑rail |
| Operating temperature | -10 °C ~ +55 °C |
| Operating humidity | < 65 % (non‑condensing) |
The module provides 16 digital input channels.
The module operates from a DC power supply of 9 V to 30 V.
Maximum power consumption is 1280 mW, not including the input channels.