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...
If a magnetic lock is buzzing or noisy it could be the result of an AC component riding on the DC supply voltage.
Using a meter, check for AC riding the DC level. If possible test the mag lock wit...
Rattling could be caused by improper mounting of the mounting plate or armature. Make sure all components are properly secured.
AC-voltage or "noise" on a power line can cause hum. Ensure supply is filtered and regulated 12 or 24 volts.Not a transformer.Also ensure hardware is properly secure eliminating the poss...
The SEH is an "electronic holder" (ONLY) that is used to hold open a Fire Rated opening. It requires a door closer to be mounted on the opposite side. It is normally used on an existing opening wit...
Hold Open Closers & Magnets (Fire/Life safety products) provide a wide range of solutions. Single or multi-point hold open closers
Utilize an electromechanical closer.
Hold the door o...