Toa VS-900MF Application Note

Toa vs-900mf intercom systems: release note

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Summary

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

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.

VS-900MF

VS-900RS

RS1 ~ RS4

Line 1 ~ 16

(CN1 ~ CN4)

TOA Electronics, Inc.

601 Gateway Blvd., Ste. 300

So. San Francisco, CA 94080

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

25 V 1 W

10 f 50 V

Call Switch

1 k

(1/4 W)

(Optional)

Table of Contents

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Page 1 VS-900 port. Diagram VS-900MF VS-900RS RS1 ~ RS4 Line 1 ~ 16 (CN1 ~ CN4) TOA Electronics, Inc. 601 Gateway Blvd., Ste. 300 So. San Francisco, CA 94080 1-650-588-2538 / 1-800-733-4750 25 V 1 W 10 f 50 V Call Switch...
Page 2 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).

Vs-900rs Vs-900