User Manual

Publication 1398-5.0 – October 1998
Interfaces 6-43
Figure 6.42 RS-232 to RS-485 Multi-Drop Connection Diagram
Intro
PC
* Pin-outs may
vary by manufacturer.
Drive 1
RCV+ RCV- XMT+
J4
1
74
8
XMT-
COM
RCV-
RCV+
XMT-
XMT+
Drive 2
RCV+ RCV- XMT+
J4
1
74
8
XMT-
Drive n
RCV+ RCV- XMT+
J4
1
74
8
XMT-
RS-232 to
RS-485 Adapter
.......
COM*
RCV*
XMT*
RS-232
Interface
+12 VDC Return
NOTE:
This example uses a 2-channel RS-232 to RS-485 adapter,
manufactured by B&B Electronics (815.433.5100).