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RELATED FAQS

Question
Answer
Can Battery Backup (BB) be added to a PS900 series power supply in the field?
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.
Why is the Von Duprin PS873 power supply buzzing or chattering?
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...
Is the Battery Backup still available for the PS873?
The battery back up is no longer available for PS873 power supply.
How many times can an EL device be operated when using a PS914-2RS with battery backup?
The Von Duprin PS914-2RS retracts the EL or QEL device approximately 200 times with five second hold time after each pull.
Are there MSDS sheets for the batteries in the 900-BB?
Attached are the MSDS (material safety data sheet) of the three different manufacturers of batteries for the 900-BB battery backup.   MSDS for 900-BB
Are the batteries for the PS 914 BBK the same as the ones from the 873 BB?
The battery for the PS873 and PS914 are the same, 7AH sealed Lead Acid  battery.