wheelock MTH-24 Service Manual

MTH-24

Series MTH-24 Multitone Horn

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

Specifications & Ordering Information

Model

Number

MTH-24 3801 24 VDC 600mA

See page 4 for General and Technical Notes.

Order

Code

Nominal

Operating Voltage

Max. Operating

Current @24 VDC

Type DBA @ 1 Meter

Weatherproof for

Indoor or Outdoor

Installation

117

72