Toa IC-100 Series Manuale
Product Support
Using a Speaker and 25V Line-Matching
Transformer as an IC-100 Sub-Station
Article ID: 1001expl
Created: 90.12.03
Modified: 97.04.09
Category: IC-100 Stations
Issue: Installation
Summary
You can build a limited function IC-100 sub-station using simple, readily
available components.
Details
TOA designed its IC-100 sub-station ports for connecting speakers equipped
with 25V line matching transformers. DC signaling between those ports and
TOA sub-station hardware provides additional functions.
The sub-station shown below supports half-duplex conversations and the
reception of pages, time signals and audio program (BGM). Optional switches
add call-in and privacy functions.
For call or privacy LED indication, or for initiating a call while receiving a
page, install an RS-100 Switch Panel or an RS-102 Call Module. For private,
duplex conversations, install an RS-110 Handset Sub-station with either an
RS-100 or an RS-102.
Diagram
LU-100
A
B
C
1k Ω1/4 watt
1k Ω1/4 watt
10µf 50V
Call Switch
(optional)
Privacy Switch
(optional)
A
BSpeaker with 25V Line
Matching Transformer
CN6 ~ CN20
Product Support
Connecting an External Amplifier to an IC-100
Sub-station Port
Article ID: 1004expl
Created: 90.06.12
Modified: 97.04.09
Category: IC-100
Issue: Installation
Summary
Connecting an external amplifier to an IC-100 sub-station port provides that
amplifier with all of the audio distribution features of an IC-100 sub-station.
Details
The circuit shown below uses capacitors for blocking the DC signaling
voltages normally used by IC-100 sub-stations. Resistors drop the speaker
signal to line level. TOA recommends transformer isolation whenever you
interconnect systems. Consider using TOA's 900 series amplifiers with "B"
series balanced input modules.
Diagram
LU-100
A
B
C
1k Ω
1/4 watt
CN6 ~ CN20
10µf
50V
1k Ω
1/4 watt
10µf
50V
330 Ω
1/4 watt
External Amplifier
with recommended input transformer
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