Rockwell Automation Publication 1606-RM008A-EN-P - November 2021
11
DC-UPS - 24V, 20 A, 480 W Reference Manual
Input voltage
Nom
DC 24V
-±25%
Input voltage range
Nom
18…30V DC
Control functions such as light-emitting diode (LEDs), monitoring features,
relay contacts, etc. are working. The unit can either be in power supply mode
or in battery mode. See
Max 30…35V
DC
Temporarily allowed, no damage to the DC-UPS. The red error light-emitting
diode (LED) reports “Input Voltage”, charging and buffering are not possible.
Max
35V DC
Absolute max voltage with no damage to the unit.
Normal operating input voltage ranges
Ranges, where the unit does not switch to battery mode. See
. Please note: The lower end must be
at least 1V higher than buffer voltages settings.
Typ.
23.5…30V DC
Range A for a 22.5V buffer voltage setting
Typ
25…30V DC
Range B for a 24V buffer voltage setting
Typ
26…30V DC
Range C for a 25V buffer voltage setting
Typ
27…30V DC
Range D for a 26V buffer voltage setting
Important: The lower end must be at least 1V higher than buffer voltages settings.
Transfer voltage for switching into battery mode
Typ
23.5V DC
Range A, 22.5V buffer voltage
Typ
25V DC
Range B, 24V buffer voltage
Typ
26V DC
Range C, 25V buffer voltage
Typ
27V DC
Range D, 26V buffer voltage
Output voltage
in power supply mode Typ
0.12V less than input
voltage at 20 A
The output voltage is always slightly lower than the input voltage,
independent of the value of the input voltage. See
in battery mode
Nom
22.5V DC
±3%
The buffer voltage is the output voltage in battery mode, selectable in four
steps via rotary switch on the front of the unit and will not change as the
batteries discharge. See
Nom
24.0V DC
±3%
Nom
25.0V DC
±3%
Nom
26.0V DC
±3%
Ripple and noise voltage
in power supply mode
not applicable
better as the supplying power supply (filter included)
in battery mode
Max
120mVpp
20 Hz to 20 MHz, 50 Ohm
Requirements for the power supply on the input
- Use an appropriately sized 24V power supply, which can deliver the additional required internal current
consumption of the DC-UPS and the required current for charging the batteries. See also
- Use power supplies that do not deliver more than 28 A continuous output current
1)
.
Input Current
internal consumption
Typ
80 mA
When batteries are fully charged
Max
2.1 A / 4.0 A
For <10 Ah / >10 Ah settings; during battery charging,
no temperature sensor installed
Max
2.3 A / 4.3 A
For <10 Ah / >10 Ah settings; during battery charging,
temperature sensor is installed
total input current
Max
Sum of the output (load) current and the internal current consumption
Output Current
in power supply mode
Nom
25 A
Continuously allowed
Nom
30 A
For max 5 s
in battery mode
Nom
20 A at 22.5V, 18 A at 26V Continuously allowed see
(interpolate linearly between
22.5V and 26V)
Nom
30 A at 22.5V, 26 A at 26V For typ 4 s (BonusPower
(1)
between 22.5V and 26V)
Typ
80 A
For typ. 25 ms, output voltage stays above 20V, (dynamic peak current), see