Individual Door Alarms - Expandable - PTI Falcon Installation And Operation Manual

Individual Door Alarms - Expandable

The PTI Falcon supports the use of PTI individual door alarms. PTI door alarms require the
use of door alarm multiplexer (mux) boxes, such as the one pictured in Figure Nine. A mux
box contains a master circuit board
capable of multiplexing forty eight
doors. If the box must multiplex more
than forty eight doors, up to three
expansion boards may be added to
the master board. Each expansion
board adds an additional forty eight
doors to the box, bringing the
maximum number of doors on one
box to one hundred ninety two.
Each building on the property must
have its own multiplexer box or
boxes. Multiplexer boxes are con-
nected to the PTI Falcon base unit
through the same three wire RS485
interface as the remote keypads.
Each alarmed door must have a
magnetic door switch mounted on
the door. The mux box will connect to
one wire from each switch in addition
to a common wire which connects to
all switches. Fifty conductor
telephone cable is often used for the
individual door wiring. If one cable is
Figure Nine
used for one mux board, it allows
forty eight conductors for the forty
eight door switches and two conductors for the common wire in order to increase the
effective wire size for the common wire.
In addition to the door wiring and communication wiring, each master mux board requires
12 VAC power in order for the board to operate. A single 12 VAC plug-in style transformer
is often used to power all of the multiplexer boxes from a central point. This allows all of the
field wiring to be low voltage.
Each mux box contains a rechargeable battery pack to sustain the operation of the alarm
box during power outages and a tamper switch to detect break-ins to the mux box itself.
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