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“ battery backup killing batteries ”

Resolution: 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?

Resolution: 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?

Resolution: 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?

Resolution: 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?

Resolution: 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?

Resolution: The battery for the PS873 and PS914 are the same, 7AH sealed Lead Acid battery.:

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“ battery backup killing batteries ”

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