Rockwell Automation 1606-XL240-UPSE Power Supply Reference Manual - Manual (Page 6)

All parameters are specified at an input voltage of 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless noted otherwise.
It is assumed that the input power source can deliver a sufficient output current.
6 Rockwell Automation Publication 1606-RM013A-EN-P — March 2014
Bulletin 1606 Switched Mode Power Supplies
7. 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 battery not fully charged.
Output voltage in buffer mode nom. DC 24V Output voltage is stabilized and independent from
battery voltage
22.45V ±1%, at no load,
22.25V ±1%, at 10A output current
Transfer threshold for buffering typ. 80mV higher than the output voltage in buffer mode
Ripple and noise voltage max. 20mVpp 20Hz to 20MHz, 50Ohm
Output current nom. 10A Continuously allowed
15A < 5s with full output voltage *)
Short-circuit current min. 17.9A Load impedance 100mOhm **)
max. 21A Load impedance 100mOhm **)
*) If the output current is in the range between 10A and 15A for longer than 5s, a hardware controlled reduction of the
maximal output current to 10A occurs. If the 10A are not sufficient to maintain the 24V, buffering stops after another 5s.
Buffering will again be possible as soon as the input voltage recovers.
**) If the nominal output voltage cannot be maintained in buffer mode, the DC-UPS switches off after 5s to save battery
capacity.
Fig. 7-1 Buffering transition, definitions
Buffer mode
Output
voltage
24V
28V Input
voltage
t
t
Transfer
threshold
500ms/DIV
0V
Output
Voltage
Input Voltage
24V
22.25V at 10A
24V
Fig. 7-3 Available output current in
buffer mode Fig. 7-4 Output voltage vs. output current
in buffer mode, typ.
Output Current
0
0 5 Sec.
15A
10A
Time
5A
BonusPower
Output Voltage
A
B
C
Continuously available
Available for 5s then auto switching to curve
Buffering will stop after 5s
D
0
0 5 10 15 20
5
10
15
25V
20
25A
Output
Current
A B
C D
D
Buffering will stop after 5s
Fig. 7-2 Transfert behavior, typ.