Valcom v-2925 Service Manual

VSP-V-2925

Issue 2

TALKBACK INTERCOM SYSTEM

V-2925 - ADD ON EXPANSION UNIT

FOR THE V-2924

The basic V-2924 Talkback Intercom System provides 24 stations with one-way, two-way, group call and all call
pages. The V-2925 Expansion Unit is an add on unit for the V-2924. Each V-2925 Expansion Unit will expand the
V-2924 by twenty-four (24) additional stations. Up to three (3) Expansion Units can be added to a system for a total
of 48, 72, or 96 zones of paging.

WARNING: Disconnect main power before servicing.
Mounting

• Plug the Expansion Unit into the Control Unit. For the first Expansion Unit, insert the P1 co nnector from the

Expansion Unit into the P8 connector on the Control Unit (Refer to Figure 1 for location of connectors). (For
each additional Expansion Unit, insert P2 into P1 – Refer to Figure 1 of the Control Unit doc u ment).

• Close latches attached to the top and bottom of the Expansion Unit over the keeper s on the top and bottom of

the Control Unit.

• Drill holes into backboard through mounting flanges on the Expansion Unit.

• Insert screws into holes and tighten scre ws firmly.

Connections

Each Expansion Unit requires (2) 66B type punchdown blocks. Mount these on the backboard near the associated
Expansion Unit. Make connections to the punchdown blocks as specified in Figure 2 – Punchdown Block
Connections.

Setting Option Switches

All options programmed for the Control Unit are available on the additional stations provided by the Expansion
Units. The only switches on the Expansion Unit requiring attention are those for Background Music. Refer to
Figure 1 for location and Table 1 for the default values of these switches. Make changes as desired for the various
zones.

Dimensions/Weight

• 17.5”H x 8.37”W x 3.06”D

(44.45cm H x 21.26cm W x 7.77cm D)

• 11 lbs. (5.0 kg)

Operation

Same as Control Unit.

V-2924 with V-2925 Expansion Unit.

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FIGURE 1 - V-2925 CONTROL AND CONNECTOR LOCATIONS

p

Side View Top View

P1

P1

P4

P2

SW1

P3

Power
LED

Connectors:
P1

- Connects to the V-2924 Control Unit

- Connects to an additi on al V- 29 25 Expansi on U ni t

P2

- Switch Inputs

P3

- S

P4

eaker Outputs

AC
Power

115/230
Switch

Fuse

Battery Backup
Connector

Switches:
SW1 - BGM Group Select Dip Switch (See Table)

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