Rockwell Automation 1771-DB Basic Module User Manual - Series A - Manual (Page 17)

Installing the BASIC Module
Chapter 3
3–3
Figure 3.1
Keying Diagram for Placement of Module Keying Bands
You may change the position of these bands if subsequent system design
and rewiring makes insertion of a different type of module necessary. Use
needle-nose pliers to insert or remove keying bands.
There are three sets of user selectable configuration plugs on the BASIC
Module (figure 3.2). You can use these configuration plugs to select:
PROM size.
peripheral port baud rate (bps).
422 receiver termination.
3.2.3
Module Keying
(continued)
3.2.4
Configuration Plugs