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Toa RS-442 User Manual

Switch board rs-442, Installation manual, General description

background image

4P removable terminal plug

(supplied with the N-8400RS)

N-8400RS Substation interface unit

To line 2 (Red)

Two pairs of

twisted pair cable

To handset

(refer to the following figure)

Frame

ground

Switch input for

the call button 3

(momentary)

Switch input for

the call button 2

(momentary)

Switch input for

the call button 1

(momentary)

To line 1 (Brown)

To line 4 (Yellow)

(Green)
(Blue)
(Black)

RS-442

To line 3 (Orange)

8 Ω speaker output

(Red) +

-

(Black)

(Gray)

(White)

(Brown)

(White)

(Blue)

(White)

*Open collector output: 24 V DC, Max. 30 mA

Control output *

External

power supply

Relay

Diode

24 V DC
GND

+

-

Microphone

INSTALLATION MANUAL

SWITCH BOARD

RS-442

Thank you for purchasing TOA’s Switch Board.

Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.

1. GENERAL DESCRIPTION

The RS-442 is a Switch board to be connected to the N-8400RS 4-wire system Substation Interface Unit.

It is equipped with 1 microphone input (with a microphone unit), 3 switch inputs for call buttons, and 1 speaker

output, enabling you to make a switch panel suitable for applications.

By assigning a different master station as a calling destination to each Call button, you can call one of them

and make a conversation.

2. CONNECTION

RS-442

Handset joint

cables

Handset cables

Wall surface

RS-481

RS-442 (Bottom)

Note

When using the RS-481 Option handset, cut the

jumper wire next to the handset joint cables on

the circuit board as illustrated below.

If not cut, sound comes out from the RS-442's

speaker and returns back to the handset’s

microphone, resulting in acoustic feedback.

Jumper wire

Handset joint cables

[RS-442 and RS-481 connections]

Note

Cut out unused wires to avoid short-circuiting.