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DC-UPS - 24V, 20 A, 480 W Reference Manual
in power supply mode
Overload behavior
in battery mode
in power supply mode
Output short circuit
current
in battery mode
Return current
Allowed voltage between input and earth (chassis) Max
Capacitive and inductive loads
(1) BonusPower: The DC-UPS is designed to support loads with a higher short-term power requirement without damage or shutdown. In battery mode, the short-term duration is hardware that
is controlled by an output power manager. At 150% output current, it is typically 4 s and longer for lower currents. Once the BonusPower time is exceeded, the maximum output current is
automatically reduced to the nominal output current or the DC-UPS goes into the HiccupPLUS mode.
(2) Use a 25 A melting fuse with a melting I2t of 400A2s – 1500A2s or a 25 A circuit breaker with tripping characteristic B, C, D, or K on the input of the DC-UPS if the current of the power supply
is higher than 28 A.
The DC-UPS has no current limiting feature included in power supply mode. The current is limited by the supplying power supply or the fuse/ circuit breaker, which must be installed when
the power supply has a continuous output current capability of more than 28 A.
(3) HiccupPLUS Mode: In battery mode, the DC-UPS can deliver 50% more output current for up to 4 s before it reduces the output current automatically to the nominal output current. If the
current requirement is continuously higher than the nominal current, the current regulation of the DC-UPS reduces the output voltage. As soon as the output voltage falls below 18V, the
output switches off and makes a restart attempt every 17 s. This cycle is repeated as long as the overload exists.
Figure 5 - Input to Output Voltage Loss
Input to Output Voltage Loss, typ.
180mV
150mV
120mV
90mV
60mV
30mV
0mV
0
5A
10A
Figure 7 - Select an appropriate power supply, which can deliver the
additional current for charging and internal consumption the DC-UPS
Input
Current
Internal
current
consumption
consumption
for battery
Figure 9 - Battery mode: HiccupPLUS behavior during a short-circuit
on output, typical
Output Current
Normal
Short -
load
circuit
31A
0
2s
17s
2s
12
not limited
HiccupPLUS Mode
not limited
Typ
31 A for 2 s
Typ
-200 µA
60V DCor 42.4V AC
No limitation
B
A
15A
20A
25A
Output Current
Output
Current
Current
charging
Normal
load
t
2s
17s
17s
Rockwell Automation Publication 1606-RM008A-EN-P - November 2021
(2)
(3)
(2)
50 m Ohm impedance, repetitive pulses, see
Leakage current to the input of the DC-UPS in battery mode
continuous, IEC 62103
Figure 6 - Input to Output Voltage Loss Measurement Setup
Power
UPS
Supply
U
IN
+
V
Input
-
Figure 8 - Battery mode: Output voltage vs. output current, typical
Output Voltage
continuous
28V
26V
24
22.5V
20
16
Hiccup
12
mode
8
4
Output Current
0
0
4
8
12
16
Figure 10 - Battery mode: Dynamic peak current behavior, typical
Output Voltage
(dynamic behavior, < 25ms)
28V
26V
24
22.5V
20
16
12
8
4
Output Current
0
0
10
20
30
40
50
60
Figure 9 on page
12.
Variable
U
OUT
Load,
I
OUT
0-25A
A
Output
V
Voltage Loss
=
U
-
U
IN
OUT
for 4s
20
24
28
32A
70
80
90
100A
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