Toa RS-442 User Manual
refer to the following figure)
8 Ω speaker output
*Open collector output: 24 V DC, Max. 30 mA
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
N-8400RS Substation interface unit
4P removable terminal plug
(supplied with the N-8400RS)
To line 1 (Brown)
To line 2 (Red)
To line 3 (Orange)
To line 4 (Yellow)
Control output *
Two pairs of
twisted pair cable
Frame
ground
[RS-442 and RS-481 connections]
(Green)
(Blue)
(Black)
-
Diode
Relay
RS-442
External
power supply
+
Note
Cut out unused wires to avoid short-circuiting.
To handset
(
+
-
Microphone
Switch input for
the call button 3
(momentary)
Switch input for
the call button 2
(momentary)
Switch input for
the call button 1
(momentary)
24 V DC
GND
(Red)
(Black)
(White)
(Gray)
(White)
(Brown)
(White)
(Blue)
RS-481
Handset cables
Handset joint
cables
RS-442
Wall surface
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.
RS-442 (Bottom)
Jumper wire
Handset joint cables
3. INSTALLATION
3.1. Installation Completion Drawing
[Front] [Side] [Rear]
Unit: mm
88.1
91.2
130 – 150 130 – 150
28.1 67.5
3.2. When Making Operation Panel for Flush-Mount Installation
Put the RS-442 in the YC-302 2-Gang Electrical Box mounted in the wall.
Then, connect the cables from RS-442 to the switches mounted on the operation panel separately prepared.
Wall surface
YC-302
2-Gang Electrical Box
RS-442
Operation panel (separately prepared)
(option)
Tip
YC-822 Indoor Wall-Mount Box
can also be used.
Note: When using the PA paging function, keep the operation panel as far away from the PA paging speaker
as possible to avoid acoustic feedback.
4. SPECIFICATIONS
Call Button Wiring 6 cables (for 3 momentary switches)
Rated Input 1 W
Control Output Open collector, Maximum controlled voltage: 30 V DC
Control current: 30 mA
Microphone Electret condenser microphone
Wiring Twisted pair cables (2 pairs)
Transmission Range 1 km/ø0.5 mm (AWG24)
1.5 km/ø0.65 mm (AWG22)
2 km/ø0.9 mm (AWG19)
Operating Temperature 0 to 40 ºC
Weight 140 g
Note: The design and specications are subject to change without notice for improvement.
Traceability Information for Europe
Manufacturer:
TOA Corporation
7-2-1, Minatojima-Nakamachi, Chuo-ku, Kobe, Hyogo, Japan
Authorized representative:
TOA Electronics Europe GmbH
Suederstrasse 282, 20537 Hamburg, Germany
URL: http://www.toa.jp/
133-21-00014-00
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