1. PS9011-2440-0000 Buffer Module 24 V DC, 40 A, 160 ms
2. Technical data, application notes, wiring
3. Selection of the backup threshold voltage

Selection of the backup threshold voltage

The buffer behavior – "Fixed Mode" or "Variable Mode" – can be selected with the backup jumper.

Fixed mode: (jumper in position "2-3" or "22.5 V fixed")
If the supply output voltage falls below 22.5 V, buffering begins and the supply voltage is maintained at this level.

This setting is recommended:

• if power supplies other than the PS3xxx series are used
• with back-feeding loads
• if the buffer module is placed close to the load or
• in case of doubt.

Variable mode: (jumper in position "1-2" or "VIN – 1 V")

Buffering begins if the supply voltage drops by more than 1 V. Buffering ends if the supply voltage increases by more than 1 V.
Voltage changes slower than 0.54 V/s are ignored if the voltage is above 22.5 V. Buffering begins immediately below 22.5 V.
This setting is recommended for all applications in which 22.5 V is too low for the application or if the buffer module is placed near the power supply.

The factory setting is fixed mode; if the jumper is missing, this also means fixed mode.