10
Rockwell Automation Publication 1606-RM028A-EN-P - September 2021
Remote Control of Output
Voltage
You can use the shut-down input to adjust the output voltage remotely,
typically between 44…54V DC. All other functions of the shut-down input
remain the same.
The control voltage is referenced to the main ground (negative output voltage).
.
To set the shutdown input to adjust the output voltage remotely:
1. Set the unit into Single Use mode.
2. Set the output voltage adjustment (48…54V) to the maximum desired
voltage.
3. Apply a control voltage to reduce the output voltage.
Efficiency and Power
Losses
Figure 19 - Remote Control of the Output Voltage
Figure 20 - Applying the Control Voltage
Output Voltage
24
0
5
28
32
36
56V
40
44
52
Control Voltage
48
10V
Potentiometer:
54V setting
48V setting
15
16
Control
Voltage
Shut-
down
Input
-
+
NC
Attributes
Values
Notes
AC 100V
AC 120V
AC 230V
Efficiency
Typ
93.5%
93.9%
95.0%
At 48V, 20 A
Average efficiency
(1)
(1) An assumption for a typical application where the power supply unit is loaded with 25% of the nominal load for 25% of the
time, 50% of the nominal load for another 25% of the time, 75% of the nominal load for another 25% of the time, and with
100% of the nominal load for the rest of the time.
Typ
92.9%
93.3%
93.9%
25% at 5 A, 25% at 10 A, 25% at 15 A, 25% at 20 A
Power losses
Typ
3.6 W
3.5 W
3.3 W
With activated shut-down
Typ
13.5 W
12.8 W
12.8 W
At 48V, 0 A (no load)
Typ
35.6 W
34.0 W
30.1 W
At 48V, 10 A (half load)
Typ
66.7 W
62.4 W
50.5 W
At 48V, 20 A (full load)
Figure 21 - Efficiency Versus Output Current at 48V,
Typ
Figure 22 - Losses Versus Output Current at 48V, Typ
y
Efficiency
4
6
8
10
12
14
16
18
20 A
88
89
90
91
92
93
Output Current
94
95
96%
120V AC
100V AC
230V AC
Power Losses
0
2
4
6
8
10
12
14
20 A
10
0
30
40
50
70
80 W
120V AC
100V AC
230V AC
16
16
60
20
Output Current
