Rockwell Automation 1606-XLSRED Power Supply Reference Manual - Manual (Page 17)

All parameters are specified at 24V, 2.5A, 230Vac input, 25ªC ambient and after a 5 minutes run-in time unless noted otherwise.
Rockwell Automation Publication 1606-RM009A-EN-P — February 2014 17
Bulletin 1606 Switched Mode Power Supplies
17.6. Example: Redundancy for Controls
The example shows a cost effective solution to get redundant power for a PLC or controller system.
In many cases, two power supplies are used; one for the demanding loads and another one for the controls and
sensitive loads. The power supply for the demanding loads can be used as a redundant source to supply the controls.
Traditional approach:
Load PS1
PLC PS2
Load
PLC
PS1
PS2
XLS
RED
Improved approach:
Fig. 17-4 Wiring diagram, redundancy for sensitive loads
Sensitive
Load
e.g.
Controller optional
L N PE
+ + - -
Power
Supply
Adj
Overload
DCok
24V,
5A
I I I
L1
L2
PE
L3
I
N
Heavy
Loads
e.g. Motors
L1 L2 L3 PE
+ + - -
1606-XLS480EA
Power
Supply
Adj
Overload
DCok
24V,20A
1606-
XLSRED
Redundancy
Module
+ -
OUT
+ -
IN 1
+ -
IN 2
Failure
Monitor
Note: Use separate mains systems for each power supply whenever possible.
1606-
XLS120E