Toa TK-20 Manual de usuario
TOA INTERCOM SYSTEMS
TALK-BACK UNIT
TK-20
DESCRIPTION
FEATURES
The TOA TK-20 Talk-Back Unit is designed for use with 1. May be installed in a switch box or on a wall.
the EXES-2000 and EXES-6000 intercom systems. When 2. Talk-back communication capability.
the TK-20 is connected to an external PA speaker, the 3. Audio trigger function with voice sensor capability.
speaker can function as a talk-back station (sub-station). 4. Call switch terminal provided.
The talk-back unit features an audio trigger function that
acts as a voice sensor to allow calls to be made from the
talk-back station to a registered master station. Calls to
the master station are also possible by using an external
switch that can be connected to the talk-back unit.
SPECIFICATIONS APPEARANCE AND DIMENSIONAL DIAGRAM
Applicable Exchanges
2-wire exchanges (EXES-6000/EXES-2000)
Usable Speaker
Conversation Method
Maximum Input Level
Audio Trigger Level
Call Switch Input
8 ohms, more than 1 watt
Press-to-talk (call from hands-free station)
Voice switch (call from handset station)
+30 dBm
-70 dBV to -40 dBV (0 dBV=1V)
One shot make contact at no voltage
(momentary type)
Transmitting Line
Current Consumption
Ambient Temperature
Range
Finish
Dimensions
Weight
Non-polar 2-conductor cable
17 mA
0°C to 60°C (32°F to 140°F)
Zinc-coated steel plate
65 (W) x 28 (H) x 114 (D) mm
2.56 (W) x 1.10 (H) x 4.49 (D) inches
230g (0.51 lb.)
*Specifications are subject to change without notice
ARCHITECT’S AND ENGINEER’S
SPECIFICATIONS
The TK-20 shall be the talk-back unit for the EXES-2000 and EXES-6000
intercom systems. By connecting the unit to an external PA speaker, the
speaker shall be able to function as a talk-back sub-station.
The TK-20 shall be able to receive calls from a master station. It shall
also be possible for TK-20 call-back unit to initiate calls to a registered
master station in two ways, either automatically by means of a voice-
sensor auto trigger function, or by use of an external switch connected to
the talk-back unit.
The TK-20 unit shall be able to be mounted in a switch box or on a wall,
with either standard metal mounting screws, or with two-sided adhesive
mounting tape.
Wall Mounting Installation
Flush Mounting Surface Mounting
TOA Corporation
Printed in Japan 833-63-028-90
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