Toa VS-900MF Montage- und Bedienungsanleitung

VS-900 Security Intercom Systems

Application Note

Using a Speaker and 25V Line-Matching

Transformer as a VS-900 Sub-Station

Summary

You can build a simple VS-900 sub-station using readily available components.

Details

The configuration shown below supports half-duplex conversation, scan monitoring,

and paging. With the addition of a call switch, the speaker can initiate a call-in to a

pre-programmed master station. Note: Connect only one speaker assembly to each

VS-900 port.

Diagram

10 µf 50 V

VS-900MF

VS-900RS

RS1 ~ RS4

A

B

C

Line 1 ~ 16

(CN1 ~ CN4)

1 kΩ(1/4 W) Call Switch

(Optional)

25 V 1 W

+

TOA Electronics, Inc.

601 Gateway Blvd., Ste. 300

So. San Francisco, CA 94080

1-650-588-2538 /1-800-733-4750

V1, All Rights Reserved, 2002

VS-900 Security Intercom Systems

Application Note

Connecting an External Amplifier to a VS-900RS

Sub-station Port

Summary

Connecting an external amplifier to a VS-900RS sub-station port provides that

amplifierwith the audiodistributionfeaturesofa VS-900 sub-station.

Details

As shown in the diagram below, the combination of resistors and capacitors block the

VS-900RS DC signaling and pad the signal to line level, suitable for connection to a

line-level input (transformer-isolated) of an amplifier such as the TOA 900 Series P-

912MK2 with a “B” Series input module (ex. B-01S). Note: This is for one-way

communication only - the PA amplifier/speakers will not act as a microphone for talk-

back(also see the VS-900AF card which offers a paging line output and 16 control ports).

Diagram

VS-900MF

VS-900RS

RS1 ~ RS4

A

B

C

Line 1 ~ 16

(CN1 ~ CN4)

10 µf 50V

1k Ω(1/4 W)

+

+

10 µf 50V

1k Ω(1/4 W)

330 Ω(1/4 W)

External Amplifier

with Input Transformer

(Zi >10k Ω)

TOA Electronics, Inc.

601 Gateway Blvd., Ste. 300

So. San Francisco, CA 94080

1-650-588-2538 /1-800-733-4750

V1, All Ri

g

hts Reserved, 2002

Andere Handbücher für VS-900MF

3

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