Rockwell Automation 1775-MX_S4A,D17756.3.1 User Manual PLC-3 BACKUP CONC(OR.DU1 - Manual (Page 25)

Installing a Backup System
Chapter 2
2-10
Figure 2.7
Location of Backup Switches for 1775ĆS5 and 1775ĆSR5 Scanner
Modules
18754
Backup Switch at
Bottom Edge of Module
Terminator Switch at
Bottom Edge of Module
Figure 2.8
Setting Backup Switches on 1775ĆS5 and 1775ĆSR5 Scanner Modules
1 2 3 4
Switch Positions:
UP = Switch is away from board
DOWN = Switch is toward board
Not Used
(always UP)
Not Used
(always UP)
Set per
Table 2.B
ON
OFF
ON
OFF
OFF
ON
10975ĆI
Table 2.B
Backup Switches for 1775ĆS5 and 1775ĆSR5 Scanner Modules
Switch
Switchover Method 2 3 Processor
Automatic switchover with controllable
switchback
DOWN UP both primary and backup
Automatic switchover with no
switchback
DOWN
UP
UP
UP
primary
backup
Manual switchover UP DOWN both primary and backup
StandĆalone mode UP UP both primary and backup