Rs-485, Rs-485 and rs-422 tip, Db9 to rj45 adaptor (cable 14) – ProSoft Technology MVI71-MCM User Manual

Page 84

Text mode
Original mode

MVI71-MCM ♦ PLC Platform

Reference

Modbus Communication Module

Page 84 of 111

ProSoft Technology, Inc.

December 28, 2007

5.3.4 RS-485

The RS-485 interface requires a single two or three wire cable. The Common
connection is optional and dependent on the RS-485 network. The cable required
for this interface is shown below:

RS-485 and RS-422 Tip

If communication in the RS-422/RS-485 mode does not work at first, despite all
attempts, try switching termination polarities. Some manufacturers interpret +/-
and A/B polarities differently.

5.3.5 DB9 to RJ45 Adaptor (Cable 14)