Von Duprin mag lock

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Von Duprin discontinued selling mag locks in the early 1990's.
A delayed egress sign is provided with the M490DE and the M490DEP.  The sign's part number is P774358
One Deleay Egress Controller (DE5101) can run two mag locks on a pair of doors, provided the doors are not controlled independently
 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...