Power losses – Rockwell Automation 1606-XLSRED40 Power Supply Reference Manual User Manual
Page 5
All parameters are specified at 24V, 40A output current, 26°C ambient and after a 5 minutes run-in time, unless noted otherwise.
Rockwell Automation Publication 1606-RM010A-EN-P — February 2014
5
Bulletin 1606 Switched Mode Power Supplies
4. Power Losses
DC 24V
Power losses
typ.
2.15W input:
2x10A
typ.
6.3W
input: 2x20A
typ.
2.6W input:
1x20A,
(only one input is connected to input voltage)
Standby power losses
typ.
0.35W
at no output current,
(only one input is connected to input voltage)
typ.
0.7W
at no output current,
(both inputs are connected to input voltages)
Fig. 4-1 Power losses when both inputs draw equal current
Output
V
A
24V,20A
+
-
e.g.
24.5V
V
A
I
1
I
2
U
1
U
2
A
V
I
OUT
U
OUT
I
1
I
2
=
U
2
U
1
L
=
osses
U
1
=
U
OUT
-
*
I
1
+
)
(
*
U
2
*
I
2
I
OUT
24V,20A
+
-
e.g.
24.5V
Variable
Load,
0-40A
XLSRED40
Input 1
Input 2
Output
Power Losses, typ.
0
0
5
10
30
1.0
2.0
4.0
5.0
7W
40A
25
15
20
35
Output Current
A
3.0
A... 25°C
B... 60°C
6.0
B
Fig. 4-2 Power losses when only one input is used
Power Losses, typ.
0
0
2.5
5
15
0.5
1.0
2.0
2.5
4W
20A
12.5
7.5
10
17.5
Output Current
1.5
3.0
3.5
A... 25°C
B... 60°C
A
B
Losses
U
1
=
U
OUT
-
*
I
1
*
I
OUT
Output
V
A
24V,20A
+
-
I
1
U
1
A
V
I
OUT
U
OUT
XLSRED40
Input 1
Input 2
Output
Variable
Load,
0-20A
Note: As soon as voltage is applied on input 2, an additional 0.35W will be consumed. It is not relevant whether this channel contributes
to the output current or not.