UC10.241, UC10.242

UC-Series

24V, 15A, CAPACITOR-BASED DC-UPS

The PC-mode always turns the output off for at least 5s after a buffer event lasting longer than 1s, independent of

whether the 24V may have recovered during this time. This function ensures that the PC gets a restart signal. To

enable a safe shut-down of the system, the forced turn off of the output is delayed with a constant time of 70s.

To activate the PC-mode, connect the two pins marked with “PC-mode” together on the signal connector together.

If the reset is to be controlled by the PC and not the DC-UPS, a wiring option called “external controlled delayed shut-

down” is available. See section 23.8 for details.

Fig. 9-1 PC-Mode -

Buffer event ends before buffer capacitors are discharged and buffer event is

shorter than 70s

>1s

Power Supply Output

DC-UPS Output

full

empty

Capacitor

Ready

Contact

closed

open

Buffering

Contact

closed

open

5s

70s

Example A:

The buffer event is longer than 1s

and ends before the buffer capacitors

are fully discharged.

After 70s of the beginning of the

buffer event, the output of the DC-

UPS will be switched off for 5s.

Fig. 9-2 PC-Mode -

Buffer event discharges the buffer capacitors before the input recovers

Power Supply Output

DC-UPS Output

full

empty

Capacitor

Ready

Contact

closed

open

10/27

Buffering

Contact

closed

open

5s

Example B:

The buffer event lasts longer than the

buffer capacitors can supply the

output.

The buffer capacitors are fully

discharged before the input voltage

recovers.

The DC-UPS output will turn-on

earliest 5s after the power supply

output voltage has recovered.

May 2016 / Rev. 2.2 DS-UC10.241-EN

All parameters are specified at 24V, 10A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.

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