Rockwell Automation 2706 DL20 SERIES G USER MANUAL - Manual (Page 122)

Chapter 9
Installation and Maintenance
9–11
Connecting 1771-DB BASIC Module to a Single DL20
Figure 9.11 shows how to connect an Allen-Bradley BASIC Module
(Catalog No. 1771-DB) to a single DL20.
Figure 9.11
Connecting a DL20 to Allen-Bradley 1771-DB Basic Module
1771-DB RS-422
Peripheral Port
GND
RS 422 (-)
RS 422 (+)
Chassis/Shield
RS-422 TXD
RS-422 TXD’
14
25
4
5
4
8
1
6
20
5
DL20 Display
RS-422 Port
The RS-422 Port of the DL20 Display must be set for
”Input” in the ”Set-Up I/O Ports” Menu when connected to
a host as shown above.
Note: Other host controllers may use
different pin numbers than shown for
the 1771-DB.
Connecting 1771-DB BASIC Module to Multiple DL20s
Figure 9.12 shows how to connect an Allen-Bradley BASIC Module
(Catalog No. 1771-DB) to multiple DL20s.
Figure 9.12
Connecting DL20s to Allen-Bradley 1771-DB Basic Module
RS 422 (-)
RS 422 (+)
1771-DB RS-422
Peripheral Port
Chassis/Shield
RS-422 TXD
RS-422 TXD’
5
6
20
4
25
1
14 5
4
RS 422 (-)
RS 422 (+)
5
4
DL20 Display DL20 Display
Note: Other host controllers may use
different pin numbers than shown for
the 1771-DB.