used to set the number of doors actually wired to the DCU board. Dial the two digit number
into the switches using a small screwdriver. The switches are read from bottom to top. For
example, thirty seven doors would require that the top switch be set to
seven
and the
bottom switch be set to
three
. If the board controls more than ninety nine doors, setting DIP
switch #1 to the
ON
position will add one hundred to the two digit number of doors dialed
into the red rotary switches.
Failure to set the switches to the correct number of
doors controlled by the DCU box will generate erroneous readings of the door
switches.
Set the other two red rotory switches to the unit number desired for the DCU box. The
boxes may be numbered in any order as long as each box has a unique unit number that is
not the same as any other box or keypad. It is typical to begin numbering the DCU boxes at
one higher than the last remote keypad number. These read rotory switches are also read
from bottom to top, so a remote unit number of three will require that the bottom red rotary
switch be set to
zero
and the one above it to
three
.
Set the remaining DIP switches as summarized in the following table:
The PTI Falcon communicates at 1200 baud, so DIP switch Two must be set to the
ON
position before applying power to the mux box. Switch Three should always be set
OFF
.
Switch Four should be set
ON
if the box is the last device on the RS485 communication
wire, otherwise it should be set
OFF
.
Testing the Alarm Wiring
The PTI alarm multiplexer box contains a small red light emitting diode (LED) on the circuit
board. This light is used for diagnostics and may be used to check your alarm switch
wiring. It is not necessary to have the PTI Falcon base unit installed or operational for this
test. It is only necessary that the alarm switch wiring be installed and power applied to the
mux box.
Switch 1: OFF = less than 100 doors; ON = more than 100
Switch 2: OFF = 9600 Baud communication; ON = 1200 baud
Switch 3: OFF = normal operation; ON = PTI test mode
Switch 4: OFF = high comm line impedance; ON = low
Note: The term "mux box" is used in this section to refer to either the PTI
expandable door alarm mux box or the PTI single wire DCU box.
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