Four wire rs-485 daisy chain connection diagram, 42 interfaces – Rockwell Automation 1398-DDM-xxx USE MNL/ULTRA 200 DIG.SERVO.DR User Manual
Page 106
Publication 1398-5.0 – October 1998
6-42
Interfaces
Four wire RS-485 connections are shown below. The cable diagram
provides a wiring example of a daisy chain connection in a typical
installation A multi-drop cable (Figure 6.42) may also be used.
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. A daisy chain wiring configuration may also be used
as shown in Figure 6.41.
Note: RS-485 pin-outs vary between manufacturers. Check the hard-
ware reference manual to ensure correct signal connections between the
host computer and the drive.
Figure 6.41
Four Wire RS-485 Daisy Chain Connection Diagram
Intro
HOST
COMPUTER
* Pin-outs
may vary by
manufacturer
Drive 1
RCV+ RCV- XMT+
J4
1
7
4
8
XMT-
*RCV-
*RCV+
*XMT-
*XMT+
RCV+ RCV- XMT+
J5
1
7
4
8
XMT-
Drive n
RCV+ RCV- XMT+
J4
1
7
4
8
XMT-
RS-485
INTERFACE
.......
Drive 2
RCV+ RCV- XMT+
J4
1
7
4
8
XMT- RCV+ RCV- XMT+
J5
1
7
4
8
XMT-