Complementary I/O: Placing Modules With 2 Slot Addressing - Allen-Bradley 1747-SN User Manual
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Also See for 1747-SN:
- Installation instructions manual (12 pages) ,
- Installation instructions manual (13 pages)
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1–12
Overview
Example 1
Example 2
Publication 1747 6.6 - July 1996
Complementary I/O: Placing Modules with 2 Slot Addressing
The figures below illustrate a possible module placement to
configure complementary I/O using 2-slot addressing.
I
I
O
O
8
8
8
8
0
1
O
O
I
I
8
8
8
8
I
O
I
O
I
16
16
16
16
0
1
Outputs in the complementary chassis would use the same bits in the
output image table as the outputs in the primary chassis. You cannot
place inputs in the complementary chassis.
1 = Output modules use the same output image table bits. This is not recommended.
2 = Must be empty if corresponding primary slot is a block transfer module.
Important: With 2 slot addressing, 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.
I
O
O
O
BT
16
16
8
8
1
1
2
3
E
E
E
M
M
M
O
O
P
P
P
8
8
T
T
T
Y
Y
Y
1
1
O
I
O
I
16
16
16
16
16
2
3
I
BT
O
8
8
O
8
4
5
E
E
M
M
O
P
P
8
T
T
Y
Y
2
2
2
2
O
I
O
16
16
16
4
5
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