Allen-Bradley D Series - Acceptable Chassis Combinations

Addressing Modes for Your Remote I/O
Chapter 3
3-24
Not all chassis combinations are acceptable in making I/O rack number
assignments. For example, a 1771-A4B I/O chassis cannot complete an
assigned I/O rack number that starts in a 1771-A1 I/O chassis. Refer to
Table 3.B for acceptable beginning I/O group numbers when making your
I/O rack number assignments.
Table 3.B
Acceptable
Beginning I/O Group Numbers
If you select: and:
The beginning I/O group
number can be:
2slot addressing 4slot chassis 0, 2, 4, 6
8slot chassis 0, 2, 4
12slot chassis 0, 2
16slot chassis 0
1slot addressing 4slot chassis 0, 2, 4, 6
8slot chassis 0, 2, 4, 6
12slot chassis 0, 2, 4,
16slot chassis 0
1/2slot addressing 4slot chassis 0
8slot chassis 0
12slot chassis 0
16slot chassis 0
Acceptable Chassis
Combinations