Datasheet

UF20.241
–
U-Series
24V, 20A, 200ms
Dec 2005 / Rev. 1.2 / DS-UF20.241-EN / All parameters are specified at 24V, 20A and 25°C ambient unless otherwise noted.
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7. BUFFER MODE
Rated output current nom. 20A
Current limitation min. 20A Electronically limited
Output voltage typ. 22.5V Jumper in position “22.5V fixed”
typ.
1V below input
voltage
Jumper in position “Vin –1V”
Ripple and noise voltage max. 200mVpp 20Hz to 20MHz, 50Ohm
Hold-up time min. 0.2s 22.5V, 20A
typ. 0.31s 22.5V, 20A
min. 28s 22.5V, 0.1A
typ. 43s 22.5V, 0.1A
To increase buffer current or extend hold-up time any given number of buffer
units can be put in parallel
Activation threshold typ. 22.5V Jumper in position “22.5V fixed”
Buffering starts if terminal voltage falls below 22.5V
typ. Vin –1V Jumper in position “Vin –1V”
Buffering starts if the terminal voltage decreases by
more than 1V. Buffering ends when terminal voltage
increases by more than 1V
Voltage changes slower than 0.54V/s will be ignored
unless the voltage is above 22.5V. Below 22.5V
buffering starts immediately.
Status lamp
flashes 10Hz
Active signal low ohmic
Ready signal
high ohmic
Fig. 7-1 Hold-up time
0,1 A
1,0 A
10,0 A
100,0 A
0,1 s 1,0 s 10,0 s 100,0 s
Buffer
Current
typ. ( 22,5 V )
typ. ( 27,8 V )
min. ( 22,5 V )