Allen-Bradley 1747-SN - Summary for Placing Modules Used in Complementary I;O; Discrete Modules; Block Transfer Modules

1–15Overview
Publication 17476.6 - July 1996
Summary for Placing Modules Used In Complementary I/O
Discrete Modules
Addressing Method Types of Modules used Placement
2slot 8point
Install input modules
opposite output modules,
and output modules
opposite input modules.
➀
1slot 8point, 16point
1/2slot 8point, 16point, 32point
➀ If an input module resides in either slot, associated with a logical group, of the primary chassis, an
input module cannot reside in that logical group' s complementary chassis.
Block Transfer Modules
Addressing Method Placement
2slot
The right slot of the primary I/O group can be another block
transfer module, or an 8point input or output module.
The left slot of the complementary I/O group must be
empty.
In the right slot of the complementary I/O group, you can
place an 8point output module; this slot must be empty if
the corresponding slot in the primary I/O group is a block
transfer module.
1slot
Leave the corresponding I/O group in the complementary
chassis empty.
1/2slot
Leave the corresponding I/O group in the complementary
chassis empty.
The following example illustrates how I/O modules requiring two
words of the input or output image can leave unused image space.