Rockwell Automation 1398-DDM-xxx ULTRA 100 Series Drives Installation Manual - Manual (Page 102)

Publication 1398-5.2 – PDF 1997
6-38 Interfaces
Multiple Axes RS-232 Communications
Multiple axes systems may be controlled by a computer with an RS-
232 serial port. An RS-232 serial communication port may be
converted to four wire RS-485 communication by attaching an RS-
232 to four-wire RS-485 converter. The figure below depicts the use
of such a device.
Figure 6.42 RS-232 to RS-485 Connection Diagram
PC
* Pin-outs may
vary by manufacturer.
This example uses a
Drive 1
RCV+
RCV-
XMT+
J5
1 7 4 8
XMT-
COM
RCV-
RCV+
XMT-
XMT+
Drive 2
RCV+
RCV-
XMT+
J5
1 7 4 8
XMT-
Drive n
RCV+
RCV-
XMT+
J5
1 7 4 8
XMT-
232 to 485
Adapter
.......
7*
5*
17*
3*
14*
3*
2*
7* COM*
RCV*
XMT*
RS-232
Interface
+
12 V
D
C
Re
tu
rn
B&B 485 Adapter