Rockwell Automation 2706-F11J_F11JC_F21J_F21JC DL50 INSTALLATION MANUAL - Manual (Page 48)

Chapter 4
Installing the DL50
4–23
The Peripheral Communications Module (Catalog No. 1775-GA) is only
applicable to Allen-Bradley PLC-3 Family Programmable Controllers. The
module plugs directly into the PLC-3 chassis. It has several serial ports and is
capable of performing many unique tasks at one time for a
PLC-3 System. The Peripheral Communications Module supports RS-232
serial port specifications.
Figure 4.19 shows how to connect the RS-232 port of the DL50 to a
Peripheral Communications Module.
Note: Using an RS-232
¹RS-485 converter such as the Black Boxt
LD-485A-MP you can connect the Peripheral Communications Module to
the RS-485 port of one or more DL50(s). See figure below.
Figure 4.19
RS-232 Connection to Peripheral Communications Module
DL50
RS-232 TERMINALS
T
R
1
G
1
2
3
4
5
6
DL50
RS-485
TERMINALS
2
3
3
2
4
5
6
20
Chassis / Shield
TxD Output
RxD Input
Signal Ground 7
1771-GA
RS-232 PORT
TxD Output
RxD Input
Signal Ground
Shield
3
2
4
5
6
20
7
RxB
RxA
TxB
TxA
E. GND
SHLD
COM
+
–
TERM
BLACK BOX
LD-485A-MP
Consult Black Box instruction
sheet for wiring connections.
Connections depend upon
converter setup.
1771-GA
RS-232 PORT
Chassis / Shield
Note: Connect shield to ground
at one node only
Shield
Peripheral
Communications Module
Catalog No. 1771-GA