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Rockwell Automation Publication 1606-RM008A-EN-P - November 2021
DC-UPS - 24V, 20 A, 480 W Reference Manual
Overload behavior
in power supply mode
not limited
(2)
in battery mode
HiccupPLUS Mode
(3)
Output short circuit
current
in power supply mode
not limited
in battery mode
Typ
31 A for 2 s
50 m Ohm impedance, repetitive pulses, see
.
Return current
Typ
-200 µA
Leakage current to the input of the DC-UPS in battery mode
Allowed voltage between input and earth (chassis) Max
60V DCor 42.4V AC
continuous, IEC 62103
Capacitive and inductive loads
No limitation
(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
Figure 6 - Input to Output Voltage Loss Measurement Setup
Input to Output Voltage Loss, typ.
0mV
10A
30mV
60mV
90mV
120mV
25A
20A
Output Current
0
150mV
A
B
A... 25°C
B... 60°C
5A
15A
180mV
V
Power
Supply
+
-
U
IN
Voltage Loss
U
IN
=
U
OUT
-
A
V
I
OUT
U
OUT
Variable
Load,
0-25A
UPS
Input
Output
Figure 7 - Select an appropriate power supply, which can deliver the
additional current for charging and internal consumption the DC-UPS
Figure 8 - Battery mode: Output voltage vs. output current, typical
Figure 9 - Battery mode: HiccupPLUS behavior during a short-circuit
on output, typical
Figure 10 - Battery mode: Dynamic peak current behavior, typical
Internal
current
consumption
Current
consumption
for battery
charging
Output
Current
Input
Current
Output Voltage
0
0
20
4
8
12
28V
16
20
32A
12
4
8
16
24
28
Output Current
continuous
Hiccup
mode
for 4s
24
26V
22.5V
Output Current
0
31A
17s
17s
17s
2s
2s
2s
t
Short -
circuit
Normal
load
Normal
load
Output Voltage
(dynamic behavior, < 25ms)
0
0
4
8
12
28V
16
20
100A
40
20
60
80
10
30
50
70
90
26V
22.5V
24
Output Current
