BSX Isolated Audio Entry System
PD-142 Issue 1
Installation and Operating Manual
Page 8 of 32
when the slide switch is in the mute position the ringer will not sound and the resident will
be unaware of calls until the switch is returned to the normal position.
Model BS LX Phone
The BS LX phone has both Door Status Indication and a sophisticated Ringer Mute facility.
Residents may mute the ringing of the BS LX by pushing the mute button on the phone; a
red LED illuminates as a reminder. Pushing the same button again will cancel the mute
function. Phones can be individually configured to automatically cancel the mute after a
pre-set time (2 min to 10 hrs.). While muted the phone will not audibly ring but the mute
LED will flash to indicate a call. Ring volume can be pre-set with an internal jumper (3
levels).
Door Status Indication is provided by the Lock button which will illuminate green whenever
the door is left open (a door monitor switch must be fitted).
Phone Options
All models of phone can be supplied with an inductive loop (IDL) to operate a hearing aid
with a ‘T’ switch.
Extension phones etc.
The BSX allows up to two phones to be connected to each output. An RT27 extension
sounder counts as one phone.
Extension sounders or strobes etc. that use their own power supplies, such as the SG1
multi-tone extension sounder or the FB31 strobe may be connected in addition to two
phones.
Electric Lock Releases
The BSX system supports either Fail-Secure or Fail-Safe lock releases or electric locks of
up to 1A rating at 12V DC.
Powered bolt, shoot-bolt or other more secure door locking systems may require the use
of separate power supplies. 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.
Fail-Safe Lock releases
Fail-Safe Lock Releases which include Magnetic Locks require power to lock the door and
will therefore fail open in the event of a power cut. An exit (egress) button should always
be fitted on the inside of the door; this should be a ‘normally open’ t
ype.
Another issue to consider with magnetic locks (which cannot be mechanically overridden),
is the possibility of being locked out of the building, due to lost codes, fobs or equipment
failure. It is advisable to consider an alternate building entrance, or an externally
accessible, secure keyswitch, or other reliable method of overriding the system.
Fail Secure Lock Releases
Fail Secure Lock Releases require power to release the door lock and will therefore
remain locked in the event of a power failure. Fire regulations usually stipulate that the exit
door should incorporate a door-handle or push-bar and not an exit button or thumb-turn.
Most fail secure locks are not continuously rated however if an electrical ‘hold
-
open’
system is used (e.g. for busy periods) then a continuously rated release must be selected.
