Chapter 7 Communications; Communication Ports; Local Port - Allen-Bradley Rockwell Automation 857 User Manual

Communication Ports

Note: The type of connectors X9
or X10 depends on the type of
communication option
(see Chapter 9, Connections).
Communications
The relay has three communication ports as standard.
There can be up to three communication ports in the rear panel. The
front panel RS-232 port will shut off the local port on the rear panel
when a programming cable (Bulletin 857-VX003-3) is inserted.
COMMUNICATION PORTS
EXTENSION
LOCAL
PORT
PORT
RS-232
GND
+8 V
DTR out
Tx out
Rx in
5 4 3 2 1
9 8 7 6
D9S
DSR in
FRONT PANEL
Figure 7.1 – Communication Ports and Connectors

Local Port

The local port has two connectors:
On the front panel
On the rear panel (see Chapter 9)
Only one can be used at a time.
NOTE: The local port functionality may be available via connector
X9 or X10 depending on the type of communication modules and
DIP switch settings (see Chapter 9).
CommunicationPorts
REMOTE
PORT
Communication
option 1
Communication
option 2
7
Chapter
X9
X10
857-UM001A-EN-P – July 2009