Can you downgrade the M490P to a M490?
Yes you can order just the board but you can't upgrade a M490 to a M490P only the other way....
Schlage Commercial » System Components » Electromagnetic Locks
What replaced the 290 maglock?
The 290 was a surface mounted shear lock.
So at this point, the replacement (not same
size) would be the GF3000SM.
GF3000SM is slightly bigger in size...
Schlage Commercial » System Components » Electromagnetic Locks | Schlage Commercial » System Components » Electromagnetic Locks » GF3000 Series
Explain Fail-Safe and Fail-Secure in terms of wiring with relays
When a lock is Fail-Safe it means that when power is dropped
it will be unlocked. During normal operation it requires power applied at
all times and a Normally Closed (NC) and Common (C) connect...
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