Rs-422, Rs-485 and rs-422 tip, Setting jumpers – ProSoft Technology MVI46-103M User Manual
Page 77: Setting, Jumpers, Mvi46-103m, Status data area
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Reference MVI46-103M
♦ SLC Platform
IEC 60870-5-103 Master Communication Module
ProSoft Technology, Inc.
Page 77 of 187
September 12, 2006
7.1.4 RS-422
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.
7.2 Setting
Jumpers
If you use an interface other than RS-232 (default), you must change the jumper
configuration to match the interface. The following illustration shows the MVI46-
103M jumper configuration:
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