Re: Electric Lock choice

["petem" <petem001@xxxxxxxxx>]

"J. Sloud" <jsloud@xxxxxxxxxxxxxxxxxxxxxxxxxxx> a écrit dans le message de
news: fgrpe1luvhd1adm2h7oufdaf0gi5fpuoqh@xxxxxxxxxx
> On 29 Jul 2005 18:53:11 -0700, bhnjr@xxxxxxxxx wrote:
>
> Aside from fire code issues others have , maglocks are, by design,
> fail safe devices.  That means that if power to the maglock is lost,
> the door will no longer be locked.  Unless steps are taken to ensure
> power cannot be disrupted to the maglock, they really aren't suitable
> for exterior door or high security use.  Typical power supplies use
> battery backup that can be used for a few hours.  We typically put all
> mags on UPS/ generator power and also monitor the power going to the
> mags with an alarm contact at will alert the end-user if power fails.
> Depending on your location, maglocks will need to be interconnected to
> the building fire alarm and you will have to supply emergency egress
> that can be operated with no prior knowledge.  A REX motion detector
> and 2" illuminated timed REX button are accepted around here for
> unsecured egress.  For secured agress, you'd need a touch sense bar
> with delayed opening that conforms to NFPA101.  It amazes me that you
> need a license in my state to put in a residential burglar alarm, but
> anybody can do access control in a public building and put hundreds of
> lives at risk with no regulation at all.
>

Wow things in the state are very different then here..

Mags lock are supposed to be unlock if a fire occur or if there is a power
failure...

So mags are only used when there is a entry/exit control of the door..

if its free egress most of the time there is no mag

And mag are always working in combination of an electric strike,the strike
is not subject to the same requirement as the mags,so in power failure and
in case of fire you just have to turn the knob or push a power bar and you
are free to go out but the door is still lock from outside

The electric strike are usually a fail secure type device,so the mags being
a fail safe device they are a complement to each other..

If we lock a door to prevent un wanted exit,like in department store,we
close emergency exit with some mag locks we use a timer device to prevent
the door ton release before having to push on the panic bar for at least 3
sec continuous,at this time there is already a buzzer sounding to say that
the pushing on the panic bar have been detected and after a total of 15 sec
the door should unlock,of course the door will unlock in case of fire with
out delay...

We never (almost never) use mag lock only..just when its for internal
door..and its pretty rare...cause we still have to make it unlock in case of
fire or in case of power failure.