4
___ 4. If using a door button with the talkback
speaker, connect normally open, single pole
push-button switch to Door Button
connection pin 33 (R/G) and pin 9 (BR/R)
Ground. (Figure 5 depicts the speaker/door
button hookup).
___ 5. Move slide switch SW1 (located on the
V-2901A board) to the ON position if the
telephone system is to ring when the door
button is pressed. (Refer to Figure 3 for
location).
___ 6. Connect the -24VDC power supply. -
24VDC should be connected to pin 25 (S/V)
and Ground connected to pin 50 (V/S). The
power LED located on the V-2901A board
should illuminate.
Battery Backup
A Valcom VPB-260 Battery Backup may be added to
the system to provide power in case of power failure.
The VPB-260 plugs directly into the V-2901A.
Figure 4 shows the appropriate connection. The
VPB-260 should be allowed to charge for
approximately 9 hours before operating the V-2901A.
The Valcom VPB-260 battery backup may be
used as the sole supply of power to the V-2901A.
Remote Door Unlock Relay
Figure 6 shows the V-2901A contact arrangement
available for electric strike plate operation.
Before connecting an electric lock to the V-2901A,
consult the manufacturer instructions for the proper
connecting arrangement.
Remote Push-button for Manual Door
Release
A momentary, normally open, single-pole,
single-throw switch can be connected to the system.
Pinouts to the 66 block are shown in Figure 7. Refer
to manufacturer instructions for proper connections.
The remote button should be placed in an
inconspicuous location to provide a more secure
system.
NOTE: If the remote button does not
respond, you have most likely entered a
confirmation press. Any immediate
additional presses will result in an alarm
condition.
Handsfree Indicator ("Station
Outputs")
The V-2901A supplies connections to allow a
handsfree indicator to be connected to the system.
During handsfree communication, pin 6 goes to
-24VDC when connected as shown in Figure 8
.
Maximum current available is 50mA.
Door Sensor
When this contact is shorted (opening the door, gate
etc) without a legitimate dialpad or remote key press
opening, this will initiate an alarm condition. Refer
to Figure 9 for typical connections.
Unauthorized Door Opening
During an alarm state, UDO (unauthorized door
opening) goes to ground, to signal a customer
provided alarm that an alarm condition exists. Refer
to Figure 10 for typical connections.
Remote Signaling (Alerting Device)
The V-2901A supplies contacts to allow an alerting
device to be connected to the system. These contacts
follow the ringing cycle (except when using British
Ring - see note page 8) and can be used to operate a
remote signaling device such as a bell, buzzer or
light. Refer to Figure 11 for a typical connection
using these contacts.
Background Music Connections
Connect the low level (-10dBm nominal) output of a
music source to pin 29 (W/BR) and pin 4 (BR/W) of
the 66 block. Adjust output of the music source to a
low level. Volume of the background music will be
regulated by the music volume control of the V-
2901A.
