DDMC1S is a communication protocol converter produced by Jietong Technology Co., Ltd., which can automatically exchange data and status of Siemens S7-200 series PLC with the specified S7-200 PLC internal register.
This manual describes the DDMC1S protocol converter, which acts as a bridge between Siemens S7-200 PLCs and JTPLC DDMEF1xx modules. It explains the supported PPI communication protocol, selectable RS‑485/RS‑422/RS‑232 interfaces, and how to configure data exchange without PLC programming.
Key sections cover hardware specifications, DIP‑switch and software configuration methods, wiring diagrams, and troubleshooting tips. The document also details how to set PLC register addresses and module addresses for analog and digital I/O modules. This manual is written in Chinese.
| Operating voltage | DC24V ±5% with polarity protection |
|---|---|
| Power consumption | Maximum 500 mW |
| Communication speed | 9600–187500 bps selectable |
| Communication format | Data bits and parity configurable |
| Transmission distance | RS‑485 <1200 m, RS‑232 <15 m |
| Input isolation | Dual communication loops with isolation |
| Dimensions | 71 mm W × 26 mm H × 128 mm L |
| Weight | ≈0.21 kg (without packaging) |
| Installation method | Standard U‑rail mounting |
| Maximum connected modules | Up to 32 DDMEF1xx modules |
Parameters can be set manually with DIP switches or via the JTDDMX configuration software; the manual lists default settings and the selectable ranges.
Port 1 defaults to 19200 bps, 8 data bits, 1 stop bit, even parity.
The DDMC1S can connect up to 32 DDMEF1xx modules on the RS‑485 bus.
Short the DTS and M2 terminals to stop the module’s master operation before configuring parameters.