Rockwell Automation 2755-SNx Adaptascan Bar Code Readers - Manual (Page 258)

13–4 Communicating with a 2760-RB Module over an RS-232 Link
Publication 2755-6.8
The 2760-RB module is placed in the 1771 chassis in slot 0 next to
the PLC. For this application, the AdaptaScan Reader communicates
through port 1 on the 2760-RB. A 1771-ASB module can also be
used to communicate with the 2760-RB module over the chassis
backplane to Remote I/O.
Flexible Interface Module
(Catalog No. 2760-RB)
Protocol Cartridge
(Catalog No. 2760-SFC1 or -SFC2)
RS-232
ASCII (Dumb) Terminal
AdaptaScan
Bar Code Reader