Wiring Notes For Rs-232/485/422 Interfaces; Wiring - ICPDAS PDS-811 User Manual

Programmable Device Server with I/O Expansion Slot(s)

2.7 Wiring Notes for RS-232/485/422 Interfaces

2.7.1 RS-232 Wiring
Note:
1. For 3-Wire RS-232 connections, it is recommended to short unused signals such as
RTS/CTS and DTR/DSR, since some system may still check the CTS and DSR status.
2. FGND is the frame ground that soldered to DB9 metal-shield.
3-wire RS-232 Wiring
9-wire RS-232 Wiring
PDS-8x1 Series User Manual, Version 1.1.2, Apr. 2015 - 24 -