PAGE 16 of 80 VX2200 TECHNICAL MANUAL VER1.4
VANDAL RESISTANT FUNCTIONAL DOOR PANELS
Description:
This module is used in the VX2200 2 wire audio, 6 wire video functional vandal resistant door panels and
includes all features required for audio & video installations. A 13.8Vdc PSU is required to power this
system. Up to 23 buttons can be connected to this module. (This module cannot be used with 316x phones).
Connections:-
Connection Function
NC
Normally closed connection of relay
C
Common connection of relay
NO
Normally open connection of relay
PTE
Push to exit button input (Switch to 0V)
SL
Switched 0V output (0V during a call for video power supply switching)
BS
Busy signal to other panels (12Vdc in standby, 0V during a call)
L
Bus connection approx. 7.5Vdc
-
0V for bus
+12
12Vdc input to power the amplifier
-
0V from PSU
Speech volume adjust:
There are three POTs available on the amplifier module for speech volume adjustment. This systems uses
only one wire to carry both directions of speech and so it is necessary to use a balance POT to adjust the
gain of the two directions to the required levels.
Factory reset
To revert to factory default settings as shown in ( ) below, power down the 138 amplifier short PTE to
ground, power up and await 6 beeps, remove the short.
Programming
There are several features of the amplifier that can be programmed into non-volatile memory. Entering each
programming stage requires the shorting of certain connections on the button matrix using the connectors 5
& 6 labelled above. Remove the plug from connector ABCD so that the connectors 5 or 6 can be connected
to the relevant pin as outlined in the tables below. Beeps are used to indicate the new setting as outlined in
the tables below. The procedure to program these settings is as follows:-
B
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