Rockwell Automation 1747-BSN Backup Scanner Module - Manual (Page 29)

Publication 1747-UM010B-EN-P - September 2003
Overview 1-15
Summary for Placing Modules Used In Complementary I/O
Discrete Modules
Block Transfer Modules
The following example illustrates how I/O modules requiring two
words of the input or output image can leave unused image space.
Addressing
Method Types of Modules
used Placement
2-slot 8-point Install input modules opposite output modules,
and output modules opposite input modules.
(1)
(1) 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 complimentary chassis.
1-slot 8-point, 16-point Install input modules opposite output modules,
and output modules opposite input modules.
1/2-slot 8-point, 16-point,
32-point Install input modules opposite output modules,
and output modules opposite input 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.