Kramer Electronics VP-727A-BA - Manual (Page 15)

Configuring the VP-727A-BA Balanced Audio Switcher
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6.4 Connecting via RS-485
You can connect the VP-727A-BA to the VP-727T, via RS-485
communication, via the VP-727xl (see section 6.4.1) or via the VP-727 (see
section 6.4.2).
6.4.1 Connecting the VP-727A-BA to the VP-727T via the VP-727xl
To connect the VP-727A-BA to the Kramer VP-727T Presentation Switcher
Control Panel via the RS-485 control port, as illustrated in the example in
Figure 6, do the following:
1. Connect the VP-727A-BA to the VP-727xl as follows:
 Connect the “A” (+) PIN on the RS-485 rear panel port of the
VP-727A-BA to the A (+) PIN on the AUDIO CONTROL rear panel
port of the VP-727xl unit
 Connect the “B” (-) PIN on the RS-485 rear panel port of the
VP-727A-BA to the B (-) PIN on the AUDIO CONTROL rear panel
port of the VP-727xl unit
 If shielded twisted pair cable is used, the shield may be connected to
the “G” (Ground) PIN on one of the units
2. Connect the VP-727xl to the VP-727T as follows:
 Connect the “A” (+) PIN on the RS-485 rear panel port of the
VP-727xl to the A (+) PIN on the RS-485 rear panel port of the
VP-727T unit
 Connect the “B” (-) PIN on the RS-485 rear panel port of the VP-727xl
to the B (-) PIN on the RS-485 rear panel port of the VP-727T unit
 If shielded twisted pair cable is used, the shield may be connected to
the “G” (Ground) PIN on one of the units
3. On the rear side, slide the SETUP DIP 2 to ON for RS-485 termination.