Toa TK-20 Specifications

TOA INTERCOM SYSTEMS

TALK-BACK UNIT

TK-20

DESCRIPTION

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
speaker can function as a talk-back station (sub-station).
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.

FEATURES

3. Audio trigger function with voice sensor capability.

4. Call switch terminal provided.

SPECIFICATIONS

Applicable Exchanges
Usable Speaker
Conversation Method

Maximum Input Level
Audio Trigger Level
Call Switch Input

Transmitting Line
Current Consumption

Ambient Temperature

Range
Finish
Dimensions

Weight

*Specifications are subject to change without notice

2-wire exchanges (EXES-6000/EXES-2000)
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)
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.)

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 voice­sensor 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.

APPEARANCE AND DIMENSIONAL DIAGRAM

Wall Mounting Installation

Flush Mounting Surface Mounting

TOA Corporation

Printed in Japan 833-63-028-90