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The Series MTH-24 Multi-Tone Horn is a loud, weather resistant, attention getting alert designed
for use in noisy or large locations where two different audible signals are required at one
location for easy identification of the alert signal.

Features

Functions as a telephone extension alert using a pulsed warble tone activated by the
telephone systems interrupted or continuous dry contact closure

Functions as an auxiliary alert using a steady tone which follows the contact closure of
a door service push-button, time clock, alarm systems, etc.

When both alerting tones are activated, the steady tone will take priority over the warble
tone

Built in 10-watt amplifier, electronic dual tone generator (steady or warble), timer for
the warble circuit, and volume control

117 dBA @ 1 meter

Includes RPS-2406, 24 VDC, 600 mA power supply

Universal mounting bracket

If an analog ring voltage (direct telephone line or PABX extension) is present, use the
CRT-T-40 telephone relay to develop a dry contact for controlling the Series MTH-24
Multi-tone Horn

The recommended replacement of the Series 163 package is as follows:

• MTH-24
• CRT-T-40

Series MTH-24 Multitone Horn

MTH-24

Model

Number

Order

Code

Nominal

Operating Voltage

Max. Operating

Current @24 VDC

Type

DBA @ 1 Meter

MTH-24

3801

24 VDC

600mA

Weatherproof for

Indoor or Outdoor

Installation

117

Specifications & Ordering Information

72

See page 4 for General and Technical Notes.

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