Bosch MT-12-24-R Specsheet

Fire Alarm Systems | MT-12/24-R Multitone Electronic Appliance (red)

MT-12/24-R Multitone Electronic
Appliance (red)

Field‑selectable choice of eight nationally and

▶

internationally recognized alerting signals

Two installer‑selectable sound output levels

▶

NFPA and ANSI compliant

▶

UL Listed for indoor or outdoor use

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Low average current draw

▶

The Wheelock MT‑12/24‑R appliance is an audible alarm­indicating device engineered to comply with temporal
pattern specifications without requiring an additional code
mechanism. It offers a selection of eight tone patterns and
two sound output levels. The temporal (Code 3) horn and
tone patterns meet ANSI/NFPA/ISO requirements for
standard emergency evacuation signaling. The extended
temperature range satisfies all severe-weather outdoor
applications.

Certifications and Approvals

Region Certification

USA UL UCST: Audible Signal Appliances, General

Signal (UL464), ULSZ: Audible Signal
Appliances (UL464)

CSFM 7135-0785:118

Canada ULC ULSZC: Audible Signal Appliances and

Accessories, Fire Alarm

Cooper Wheelock, Inc. also holds these Listings and Approvals:

USA NYC/MEA 151‑93‑E, Vol. 4

CBFP City of Chicago Bureau of Fire Protection

ANSI Complies with American National Stand-

ards Institute ANSI 117.1

ISO Complies with International Standards Or-

ganization

NFPA Complies with National Fire Protection As-

sociation NFPA 72

OSHA Complies with Occupational Safety and

Health Administration OSHA 29
Part 1910.165

Installation/Configuration Notes

Compatible Products

The following products are compatible with the MT‑12/24‑R
Electronic Appliance:

Category Product ID Product Description

Control
Panels

Compatible with all Bosch G Series, 6000 Series, 2000 Series,
DS7400Xi and DS7400XiV4, DS7080iP‑32, DS7200 Series,

and DS7060 Series Control Panels

2

D7022

3

D7024

D7024 Conventional FACP

1

Conventional FACP

Addressable FACP

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2 | MT-12/24-R Multitone Electronic Appliance (red)

Category Product ID Product Description

4

D8024

4

D9124

D10024A

4

Analog FACP

Addressable FACP

Analog FACP

Modules SM‑12/24‑R Synchronization module (red)

DSM‑12/24‑R Dual synchronization module (red)

RSSP‑121575W‑FR Retrofit strobe plate (12 V)

RSSP‑241575W‑FR Fixed‑candela retrofit strobe plate

(24 V)

RSSP‑24MCW‑FR Multi‑candela retrofit strobe plate

(24 V)

RSSP‑24MCWH‑FR High‑candela retrofit strobe plate

(24 V)

1

For synchronization, use the SM or DSM modules with
these control panels and set the appliances and
synchronization module for 12 VDC operation.

2

The D7022 can be used in either 12 VDC or 24 VDC mode,
but the appliances and synchronization module must be set
for the same operating voltage as the control panel.

3

When used with a D7039 Multiplex Expansion Module, the
D7024 becomes an addressable fire alarm control panel
(FACP).

4

For synchronization, use the SM or DSM modules with
these control panels and set the appliances and
synchronization module for 24 VDC operation.

Note The retrofit strobe plates are available in 12 V

or 24 V models. Choose a model with the
correct voltage for the control panel being
used. Refer to Use as Combination Appliance.

Mounting Considerations
Outdoor or Severe Environment Applications

For an outdoor application or a severe environment
(NEMA 3R) application, these multi‑tone appliances in
combination with an IOB Indoor or Outdoor Back Box must
be mounted on a flat wall such that the wall covers the
entire rear surface of the back box. The back box must have
its drain holes pointed toward the ground. The knockouts
in the rear surface of the back box must remain intact.

The knockout hole on top of the back box is sized for a half­inch conduit and matching connector. A proper watertight
conduit fitting must be used.

Indoor Applications

For inside applications, mount these multi‑tone appliances
on the indicated back boxes for the indicated applications:

Conduit
Applications

Surface
Mounted

Semi‑Flush or
Flush Mount

Double‑gang • • *

Four‑inch square • • *

DBB • • *

IOB • •

SBB • •

* For semi‑flush applications use an ISP2 Surface Adapter.

All models have an attractive cover plate for a clean,
finished appearance.

Use as Combination Appliance

Where combination appliances are required, the MT
Electronic Appliances can be used with the
RSSP‑121575W‑FR (12 V, 15/75 cd), RSSP‑241575W‑FR
(24 V, 15/75 cd), RSSP‑24MCW‑FR (24 V, 15 cd, 30 cd,
75 cd, or 110 cd), or RSSP‑24MCWH‑FR (24 V, 135 cd or
185 cd) Retrofit Strobe Plates that are designed to meet or
exceed the latest requirements of NFPA 72, ANSI 117.0 and
UL 1971. The multi‑tone appliances and retrofit strobe
plates are also compatible with the SBL2‑R Retrofit Device
Back Box.

Note These strobe units are not recommended for

use in coded or pulsed signaling circuits.

Wiring

The input terminals accept wires with diameters between
18 AWG (1.2 mm) and 12 AWG (2.3 mm).

Parts Included

Quant. Component

1 Electronic appliance

1 Hardware pack

1 Literature pack

Technical Specifications

Alarm Patterns and Ratings

Horn (continuous)

Current (maximum) at
12 V:

Current (maximum) at
24 V:

High output: 176 mA VDC, 172 mA FWR
Standard output: 34 mA VDC, 39 mA VDC

High output: 108 mA VDC, 87 mA FWR
Standard output:44 mA VDC, 45 mA FWR

Pattern Description: Broadband continuous horn

Sound output* at 10 ft
(3 m):

High output: 92 dBA
Standard output: 87 dBA

Bell

Current (maximum) at
12 V:

High output: 95 mA VDC, 98 mA FWR
Standard output: 20 mA VDC, 23 mA FWR

MT-12/24-R Multitone Electronic Appliance (red) | 3

Horn (continuous)

Current (maximum) at
24 V:

Pattern Description: 1560 Hz modulated (0.7 sec on, repeat)

Sound output* at 10 ft
(3 m):

Horn (march-time)

Current (maximum) at
12 V:

Current (maximum) at
24 V:

Pattern Description: Horn (0.25 sec on, 0.25 sec off, repeat)

Sound output* at 10 ft
(3 m):

Horn (Code 3)

Current (maximum) at
12 V:

Current (maximum) at
24 V:

Pattern Description: Horn (ANSI S3.41 temporal pattern)

Sound output* at 10 ft
(3 m):

Tone (Code 3)

Current (maximum) at
12 V:

Current (maximum) at
24 V:

Pattern Description: 500 Hz (ANSI S3.41 temporal pattern

Sound output* at 10 ft
(3 m):

Slow Whoop:

Current (maximum) at
12 V:

Current (maximum) at
24 V:

Pattern Description: 500 Hz to 1200 Hz sweep

Sound output* at 10 ft
(3 m):

Siren

Current (maximum) at
12 V:

Current (maximum) at
24 V:

Pattern Description: 600 Hz to 1200 Hz sweep

Sound output* at 10 ft
(3 m):

High‑Low

Current (maximum) at
12 V:

High output: 53 mA VDC and 51 mA FWR
Standard output: 24 mA VDC, 28 mA FWR

High output: 86 dBA
Standard output: 80 dBA

High output: 142 mA VDC, 172 mA FWR
Standard output: 34 mA VDC, 39 mA FWR

High output: 104 mA VDC, 87 mA FWR
Standard output: 38 mA VDC, 45 mA FWR

High output: 89 dBA
Standard output: 84 dBA

High output: 142 mA VDC, 172 mA FWR
Standard output: 34 mA VDC, 39 mA FWR

High output: 91 mA VDC, 87 mA FWR
Standard output: 35 mA VDC, 45 mA FWR

High output: 88 dBA
Standard output: 83 dBA

High output: 105 mA VDC, 103 mA FWR
Standard output: 21 mA VDC, 23 mA FWR

High output: 75 mA VDC, 60 mA FWR
Standard output: 35 mA VDC, 36 mA FWR

High output: 85 dBA
Standard output: 80 dBA

High output: 142 mA VDC and FWR
Standard output: 35 mA VDC, 38 mA FWR

High output: 98 mA VDC, 92 mA FWR
Standard output: 37 mA VDC, 42 mA FWR

(4 sec on, 0.5 sec off, repeat)

High output: 90 dBA
Standard output: 85 dBA

High output: 152 mA VDC, 153 mA FWR
Standard output: 30 mA VDC, 34 mA FWR

High output: 104 mA VDC, 92 mA FWR
Standard output: 36 mA VDC, 40 mA FWR

(1.0 sec on, repeat)

High output: 89 dBA
Standard output: 84 dBA

High output: 114 mA VDC, 116 mA FWR
Standard output:26 mA VDC, 29 mA FWR

Horn (continuous)

Current (maximum) at
24 V:

Pattern Description: 1000 Hz and 800 Hz

Sound output* at 10 ft
(3 m):

* Sound output is a minimum UL rating based on sound
power measurements in a reverberant test room per UL464
and applies to both 12 V and 24 V filtered or unfiltered input
voltages.

Note The sound output for the Temporal Code 3

Environmental Considerations

Relative Humidity: Up to 95%, non‑condensing

Temperature (Operating): -31°F to +150°F (-35°C to +66°C)

Mechanincal Properties

Dimensions (H x W x D): 5.125 in. x 5.125 in. x 2.0 in.

Material: High‑impact thermoplastic

Power Requirements

Input Voltage (nominal): 12 VDC or FWR or24 VDC or FWR

Voltage Range: 12 V: 8.0 V to 17.5 V 24 V: 16.0 V to 33.0 V

Trademarks

Trademark names are used throughout this document. In
most cases, these designations are claimed as trademarks
or registered trademarks in one or more countries by their
respective owners. Rather than placing a trademark symbol
in every occurrence of a trademark name, Bosch Security
Systems, Inc. uses the names only in an editorial fashion
and to the benefit of the trademark owner with no intention
of infringing the trademark.

Cooper Wheelock is a division of Cooper Menvier, a Cooper Industries, Ltd.
company.

High output: 57 mA VDC; 58 mA FWR
Standard output: 26 mA VDC, 32 mA FWR

(0.25 sec on, alternate)

High output: 86 dBA
Standard output: 81 dBA

mode is rated lower than in Continuous mode
because the time that the horn is off is
averaged into the sound output rating. While
the horn is producing a tone in Temporal
Code 3 mode, its sound pressure is the same
as the Continuous mode.

(13 cm x 13 cm x 5.1 cm)

Ordering Information

MT-12/24-R Multitone Electronic Appliance
(red)

Red audible alarm-indicating device with eight
tone patterns and two sound output levels

MT-12/24-R

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4 | MT-12/24-R Multitone Electronic Appliance (red)

Americas:

Bosch Security Systems, Inc.
130 Perinton Parkway
Fairport, New York, 14450, USA
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.us

© Bosch Security Systems Inc. 2010 | Data subject to change without notice
T6852522507 | Cur: en-US, V2, 4 Jul 2010

Europe, Middle East, Africa:

Bosch Security Systems B.V.
P.O. Box 80002
5600 JB Eindhoven, The Netherlands
Phone: + 31 40 2577 284
Fax: [phone]
[e-mail]
www.boschsecurity.com

Asia-Pacific:

Robert Bosch (SEA) Pte Ltd, Security Systems
11 Bishan Street 21
Singapore 573943
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.com

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