Rockwell Automation Publication 1606-RM121A-EN-P - October 2020
11
Efficiency and Power
Losses
The average efficiency is an assumption for a typical application where the
power supply is loaded with the following:
•
25% of the nominal load for 25% of the time
•
50% of the nominal load for 25% of the time
•
75% of the nominal load for 25% of the time
•
100% of the nominal load for 25% of the time
Attributes
Values
Notes
AC 100V
AC 120V
AC 230V
Efficiency
Typ
90.6%
92.1%
93.8%
At 24V, 3.8 A (full load)
Average efficiency
Typ
90.5%
91.6%
92.0%
25% at 0.95 A, 25% at 1.9 A,
25% at 2.85 A, 25% at 3.8 A
Power losses
Typ
0.3 W
0.3 W
0.4 W
At no load
Typ
5.0 W
4.3 W
3.8 W
At 24V, 1.9 A (half load)
Typ
9.5 W
7.9 W
6.0 W
At 24V, 3.8 A (full load)
Figure 13 - Efficiency Versus Output Current at 24V, Typ
Figure 14 - Losses Versus Output Current at 24V, Typ
Efficiency
0.2
87
88
89
90
91
92
93
86
94%
3.8 A
1.4
2.0
3.2
Output Current
0.8
2.6
a) 230V AC
b) 120V AC
c) 100V AC
c
b
a
Power Losses
0
0.5
4.0 A
0
1
4
5
8
10 W
9
1.0 1.5 2.0
Output Current
2.5 3.0
a) 100V AC
b) 120V AC
c) 230V AC
3.5
7
6
2
3
c
b
a
Figure 15 - Efficiency Versus Input Voltage at 24V, 3.8 A, Typ
Figure 16 - Losses Versus Input Voltage at 24V, 3.8 A, Typ
Efficiency
85
120
155
190
225 260V AC
88
89
90
91
Input Voltage
92
93
94%
Power Losses
2
4
6
8
10 W
85
120
155
190
225 260V AC
Input Voltage
