Physical vs. logical – Rockwell Automation 2706 DL40 HARDWARE USER MANUAL User Manual
Page 97

Chapter 10
Using Remote I/O
10 – 5
Figure 10.7
DL40s with SLC 5/01, 5/02, 5/03, 5/04
SLC 5/01
SLC 5/02
SLC 5/03
CLS 5/04
DL40
DL40
Up to
-12 DL40s and 3 logical racks with an SLC
Remote I/O
1747-SN
Scanner Module
Note: The SLC Series B Scanner Module (Catalog No. 1747-SN) will allow
Block Transfers. Series A units will allow only Discrete Bit Transfers.
To further explain Physical and Logical specifications, and to help you
properly configure your Remote I/O architecture, please refer to the
following example:
A typical valid Remote I/O configuration for PLC 5/15 would be:
(4) 1/4 racks, (2) 1/2 racks and (1) full rack
Total devices = 4 + 2 + 1 = 7 devices.
This configuration is within the physical specification of
12 for the PLC 5/15.
Note: PLC 5/15 Series B, Revision H or later have partial rack addressing.
Earlier versions were limited to full racks.
4 x 1/4 racks
= 1
logical rack
2 x 1/2 racks
=
1 logical rack
1 full rack
= 1
logical rack
= 3
logical racks
The example given is also within the
3-
rack logical limitation of the PLC
5/15.
Physical vs. Logical
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