8 Rockwell Automation Publication 1606-RM003A-EN-P - March 2019
DC-UPS with Integrated Battery - 24V, 10 A
Output in Buffer Mode
If the input voltage falls below a certain value (transfer threshold level), the
DC-UPS starts buffering without any interruption or voltage dips. Buffering is
possible even if the battery is not fully charged.
Figure 6 - Input to Output Voltage Drop, Typ. Figure 7 - Output Voltage versus Output Current in Normal
Mode at 24V Input, Typ.
Attribute Description
Output voltage Nom 24V DC
22.45V
22.25V
The output voltage is stabilized and independent from the
battery voltage.
at no load
at 10 A output current
Transfer threshold for
buffering
Typ 80 mV greater than the output voltage in buffer mode.
Ripple and noise
voltage
Max 20 mVpp 20 Hz to 20 MHz, 50 Ohms
Output current Nom 10 A
15 A
Continuously allowed
<5 s with full output voltage
(1)
(1) If the output current is in the range 10 A…15 A for longer than 5 s, a hardware-controlled reduction of the maximal output current
to 10 A occurs. If the 10 A are not sufficient to maintain the 24V, buffering stops after another 5 s. The buffering is possible again as
soon as the input voltage recovers.
Short Circuit current Min
Max
17.9 A
21 A
Load impedance 100 mOhm
(2)
Load impedance 100 mOhm
(2)
(2) If the nominal output voltage cannot be maintained in buffer mode, the DC-UPS switches off after 5 s to save battery capacity.
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