Rockwell Automation 1715-OF8I Redundant I/O System User Manual User Manual
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Rockwell Automation Publication 1715-UM001C-EN-P - March 2014
Chapter 1
Redundancy System Overview
Module Positioning in the 1715 Redundant I/O System
There are 26 total slot positions in the system numbered from 0…25. The first
two positions always contain the redundant adapter module pair, in slots 0 and 1.
The remaining positions begin numbering at slot 2 and contain the I/O modules,
ending at slot position number 25. Any combination of simplex or duplex I/O
module pairs can be used in the I/O base units. See
for a sample of what a
system could look like.
Expansion cables can be used to connect base units, as shown in
.
TIP
The sample system configuration in Example 1 does not match the system
layout displayed in Example 2. These are different examples of possible
configurations you can have for your system.
Table 3 - Example 1 - A Sample System Configuration
System Slot Number
Base Unit Type
Module Position/Slot Number by Base
Unit Type
Module Designation
0
Adapter
0
Adapter A
1
Adapter
1
Adapter B
2
I/O
01 First I/O base unit
Module A of first duplex pair
3
I/O
02
Module B of first duplex pair
4
I/O
03
Module A of second duplex pair
5
I/O
04 Second I/O base unit
Module B of second duplex pair
6
I/O
05
First simplex module
7
I/O
06
Module A of third duplex pair
8
I/O
07 Third I/O base unit
Module B of third duplex pair
9
I/O
08
Second simplex module
10
I/O
09
Third simplex module
11…25
I/O
10…24 Fourth…eighth I/O base unit
Any combination of simplex/duplex pair modules