bell
issimo
2-72 Way Video Entry System
PD-098 Issue 4B Installation and Operating Manual Page 15 of 44
Audio Phones
The BSA audio phone can be used as a lower cost alternative to an extension videophone.
It is styled like the bellissimo videophone. The phone is manufactured in white and grey
high-impact ABS plastic that imparts high durability and compliments most wall
furnishings. It incorporates both mute and lock illuminated buttons and it has an Electronic
Ringing Tone with rotary preset volume.
BSA Phone
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.
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