battery for schalge hhd device?

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Warranty on the HHD is one (1) year from date of purchase.  The battery for the HHD (Bluebird Pidion) is covered under warranty.   However, as the batteries are not available s...
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...
The Von Duprin PS914-2RS retracts the EL or QEL device approximately 200 times with five second hold time after each pull.
Followings are the reason for 98/99 exit alarm ALK not sound when push bar is activated. Make sure key switch on exit alarm ALK is turned on, wait for 20 seconds before you activating the pushba...
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 ...