Battery backup can be added to the PS900 series power supplies. Order the 900-BBK to get the battery backup board and batteries for field installation.
Attached table provides how long the battery back up will last with a PS914 power supply.
Load (Amp
DC)
Battery
backup time
Comments
0.3 Amp
20 hours
Continuous load
...
Some transformers in the power supplies provide a little humming noise and that is normal. If the humming in Von Duprin PS873 power supply is loud follow these steps. Remove the load from the outp...