Rockwell Automation 1785-LTx,D17856.2.1 Classic PLC-5 Programmable Controllers Users Manual - Manual (Page 58)

Assigning Addressing Modes,
Racks, and Groups
Chapter 4
4-16
Placing Complementary I/O Modules
See Table 4.B for a summary of 8-, 16-, and 32-point I/O module
placement guidelines. See Table 4.C for a summary of block-transfer
module placement guidelines.
Table 4.B
Placement Summary for 8Ć, 16Ć, and 32Ćpoint Modules Used in
Complementary I/O
Addressing
Method
Guidelines
Types of Modules Used: Placement
2ĆSlot 8Ć point Install input modules opposite output modules and output modules
opposite input modules
1ĆSlot 8Ć point, 16Ćpoint,
opposite input modules.
1/2ĆSlot 8Ć point, 16Ćpoint, 32Ćpoint
Table 4.C
Placement Summary for BlockĆtransfer Modules Used in
Complementary I/O
Addressing
Method
BlockĆTransfer Placement Guidelines in Primary Chassis
Using singleĆslot modules: Using doubleĆslot modules:
2ĆSlot • The right slot of the primary I/O group can be
another singleĆslot block transfer module, or an
8Ćpoint 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 8Ćpoint output module; this slot must be
empty if the corresponding slot in the primary I/O
group is a singleĆslot block transfer 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 only place an 8Ćpoint output module (if any).
1ĆSlot Leave the corresponding I/O group in the
complementary chassis empty.
• The left slot of the two corresponding I/O slots in the
complementary chassis must be empty.
• In the right slot of the two corresponding I/O slots in
the complementary chassis, you can place an input,
output, or singleĆslot block transfer module (if any);
the modules can be either 8Ćpoint or 16Ćpoint I/O
modules.
1/2ĆSlot Leave the corresponding I/O group in the
complementary chassis empty.
• The left slot of the two corresponding I/O slots in the
complementary chassis must be empty.
• In the right slot of the two corresponding I/O slots in
the complementary chassis, you can place an input,
output, or singleĆslot block transfer module (if any);
the modules can be 8Ćpoint ,16Ćpoint and/or 32Ćpoint
I/O modules.