User manual
Application Ports S3964R ♦ ProLinx Gateway
Driver Manual Siemens 3964R Protocol
ProSoft Technology, Inc. Page 27 of 64
April 14, 2009
3.2.4 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.
3.2.5 DB9 to Mini-DIN Adaptor (Cable 09)