Rockwell Automation 1794-ASB/E Remote I/O Adapter Module User Manual - Manual (Page 51)

3–17 Communicating with FLEX I/O Modules
Publication 1794ĆUM009D-EN-P - April 2004
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smallest rack size is 1/4, regardless of the mode switch settings
Some examples of rack definition are shown below.
Adapter
= 1 Logical Rack in Standard mode, any density or analog module mix
Module Module Module Module
Example 1 - 8 Terminal Bases, 8 Modules
= 1/4 Rack in Compact mode with 8Ćpt modules; 1/2 Rack in Compact mode (with 16Ćpt modules)
Module Module Module Module
= 2 Logical Racks in Standard 32 mode, any density or analog module mix
PrimaryĆ
Adapter
= 1 Logical Rack in Complementary mode (16 16Ćpt modules), primary input modules - complement
output modules and vice versa; analog complemented with another analog module or an empty slot
= 1/2 Rack in Complementary mode (16 8Ćpt modules), primary input modules - complement output
modules and vice versa; analog complemented with an empty slot
Module Module Module Module
Example 2 - 16 Terminal Bases, 16 Modules, Complementary Mode
Module Module Module Module
Complement
Adapter
Module Module Module Module Module Module Module Module
= 2 Logical Racks in Complementary 32 mode (16 modules total, any density),
Last
M d l
Rack Size for each Addressing Mode
Module
Position
Standard
32
Standard Compact
16
Compact
8
Complement
32
Complement
16
Complement 8
0 1/4 rack 1/4 rack 1/4 rack 1/4 rack 1/4 rack 1/4 rack 1/4 rack
1 1/2 rack 1/4 rack 1/4 rack 1/4 rack 1/2 rack 1/4 rack 1/4 rack
2 3/4 rack 1/2 rack 1/4 rack 1/4 rack 3/4 rack 1/2 rack 1/4 rack
3 Full rack 1/2 rack 1/4 rack 1/4 rack Full rack 1/2 rack 1/4 rack
4 1-1/4 rack 3/4 rack 1/2 rack 1/4 rack 1-1/4 rack 3/4 rack 1/2 rack
5 1-1/2 rack 3/4 rack 1/2 rack 1/4 rack 1-1/2 rack 3/4 rack 1/2 rack
6 1-3/4 rack Full rack 1/2 rack 1/4 rack 1-3/4 rack Full rack 1/2 rack
7 2 Full racks Full rack 1/2 rack 1/4 rack 2 Full racks Full rack 1/2 rack