Wire The Prt1 And Prt2 Communication Ports - Allen-Bradley SLC 500 BASIC Installation Instructions Manual

Wire the PRT1 and PRT2 Communication Ports

Ports PRT1 and PRT2 can communicate to user devices through RS-232/423, RS-422,
and RS-485 communication modes. The communication mode you select depends
on the setting of jumpers JW1 and JW2. Refer to the MODE command in the BASIC
Reference Manual, publication 1746-RM001, for the default programming port
configuration information.
IMPORTANT
Pin Assignments
Use these pin assignments to wire the mating connector of the cable used to
interface a user device to port PRT1 or PRT2. The sockets of this connector must be
wired to correspond to the selected communication mode.
Pin RS-232/423
1 Note 1
2 RXD
3 TXD
4 DTR
5 COMMON
6 DSR
7 RTS
8 CTS
9 (1)
(1) In RS-423 mode, these pins are still connected to their RS-422 loads. Do not use these pins in RS-423 mode.
(2) In RS-422 and RS-485 modes, these pins are connected to their RS-423 drivers and receivers. Do not use these pins in
either RS-422 or RS-485 mode.
(3) In RS-485 mode, these pins are still connected to their RS-422 receivers. Do not use these pins in RS-485 mode.
Wiring diagrams for the RS-232/423 communication mode are shown starting on
page 16.
When default communications are selected via JW4, the module
always powers up in the Command mode at 1200 bps, no parity, 8
data bits, and 1 stop bit.
RS-422
422 TXD -
422 RXD -
(2)
(2)
COMMON
422 RXD +
(2)
(2)
422 TXD +
SLC 500 BASIC and BASIC-T Modules
RS-485 IBM AT Standard
RS-232 Signals
TRXD - DCD or CD
(3) RXD
(2) TXD
(2) DTR
COMMON COMMON
(3) DSR
RTS
(2)
(2) CTS
TRXD + RI
Publication 1746-IN009B-EN-P - August 2005
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