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
▶
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
www.boschsecurity.com
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
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