bellagio Digital Entry System
PD
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281 Issue 1
Installation and Operating Manual
Page 21 of 52
Electric Door Release
Both fail-secure and fail-safe lock releases (including magnetic locks) use the same
terminals. To set the lock type, refer to the ‘Door Controller Settings’. When installing lock
releases please allow a little movement on the door, as operation will be impaired if fitted
too tight.
NB. Magnetic locks (maglocks) must be fitted with a suppressor at the lock terminals.
Some manufacturers fit an acceptable internal suppressor.
Fail Safe Exit: Notes
Fail safe exits require an exit button and this should be normally open so that the controller
can be used to give a timed exit. If the exit button has both normally open and normally
closed contacts, then the normally closed contact can be wired in series with the release
or maglock along with the break glass in case of equipment failure.
A not uncommon problem with maglocks, because they cannot be mechanically
overridden, is being locked out of the building due to lost codes, fobs or equipment failure.
So consider an alternate building entrance, or an externally accessible secure keyswitch,
or a reliable method of disabling the system during overnight secure lockup.
Fail Secure Exit: Notes
Commonly fail secure exit doors incorporate a thumb-turn, door handle or mini push bar
rather than use of an exit button. Fire officers usually require a minimum of door handle or
push bar to open a door on a fire exit route
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not a thumb-turn.
Most fail secure locks are not continuously rated and if an electrical hold open system is
used for say busy times, then a continuously rated release must be used.
Powered bolt, shoot-bolt or other more secure door locking systems may require the use
of separate power supplies or a suppressor to be fitted. Shoot-bolt systems for instance
tend to require at least 1.5A peak current and this will require the use of an isolation relay
and a separate power supply for the lock.
Exit Button Input
The exit button is used to unlock the door for the pre-set lock operating time. The input is
designed only for use with a norma
lly open push button. ‘Exit +’ is the input and ‘Exit
-
’ is
internally connected to 0V.
The ‘Exit +’ input can also be used for connection to other equipment to open the door.
This is detailed in a supplement, see Other Diagrams.
Door Open Switch
The door open switch is used to provide an indication at the videophone that the door has
been left open. This switch can have closed contacts when the door is closed or open
contacts when the door is closed, the choice being made in Panel Programming. The
defa
ult of ‘contacts open when door closed’ must be selected when this feature is not
required.
Time Clock Sharing
In a large system a single time clock can be shared between distributed equipment areas
by borrowing one of the ‘comm
-
’ wires in the interconnec
ting Cat5 to use as the shared
“Time clock common”. This is detailed in a supplement, see Other Diagrams.
