Rockwell Automation 2706 DL40 HARDWARE USER MANUAL - Manual (Page 98)

Chapter 10
Using Remote I/O
10 – 6
An invalid Remote I/O configuration for a PLC 5/15 would be:
(8) 1/2 racks.
Although 8 is less than the 12 device physical specification, (8) x 1/2 = 4
logical racks which is greater than the PLC 5/15’s 3 rack logical
specification. Therefore (8)1/2 racks is an invalid Remote I/O configuration
for the PLC 5/15.
A sub-scanner may be used with any PLC 5/15. It allows the PLC 5/15 to
communicate with up to 7 logical racks and a maximum of 16 devices, or
chassis, as they are commonly called.
The DL40 is compatible with all Allen-Bradley scanners that support Remote
I/O.
Tables 10.A, 10.B, and 10.C list applicable PLCs and their respective
scanners.
Table 10.A
Applicable Programmable Controllers
Catalog
Number Description Related Pub. No.
1772-LP1 PLC 2/20 1772-6.8.1
1772-LP2 PLC 2/20 1772-6.8.1
1772-LP3 PLC 2/30 1772-6.8.3
1775-L1, L2 PLC 3 1775-6.4.1
1775-LP4 LP8 PLC 3/10 1775-2.20-DUI
1785-LT PLC 5/15 1785-6.8.2
1785-LT2 PLC 5/25 1785-6.8.2
5250-LP1,-LP2 PLC 5/250 5000-2.17
Table 10.B
Applicable Programmable Controllers Requiring a 1771-SN Sub-Scanner
Catalog Number Description Related Pub. No.
1772-LS, LSP Mini-PLC 2/05 1772-6.8.6
1772-LV Mini-PLC 2/15 1772-6.8.2
1772-LX, LXP Mini-PLC 2/16 1772-2.26
1772-LW, LWP Mini-PLC 2/17 1772-2.25
1772-LN Mini-PLC 2 1772-6.8.4
178I-LT3 PLC 5/12 1785-6.8.2
* The 1771–SN Sub–Scanner may be used with any PLC–2 or PLC–5 family processor.
Corresponding Publications
for Processors and Scanners