Effective: August 1999
MT and MT Strobe Series
Electronic Horn/Multitone Signals
75-001
FEATURES
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Listed under UL Standard 1971 for Emergency
Devices for the Hearing Impaired and UL 464 for
Audible Appliances.
CSFM (Pending) MEA (Pending)
One alarm appliance with (8) eight selective
signals to provide superior sound penetration for
various ambient and wall conditions with two field
selectable sound output levels.
Code-3 Horn and Tone meet ANSI/NFPA/ISO
temporal pattern for standard emergency
evacuation signaling.
Audible and strobe can operate from a single
signaling circuit with any of the (8) eight audible
signals.
Designed to meet or exceed NFPA/ANSI Standards
and ADA Accessibility Guidelines.
Low current draw with low temperature
compensation to reduce power consumption and
wiring costs.
MT Strobe models available with 15, 15/75, 30 and
75 candela ratings for independent or single input
activations.
Patented LS, LSM, MS and IS Series strobe
designs (with additional patents pending) offer fire
alarm system designers, specifiers and installers
the industry’s widest selection of UL 1971 Listed
strobe products.
Wide listed voltage range, filtered (DC) and FWR.
Polarized inputs for compatibility with standard
reverse polarity type supervision of circuit wiring
by an alarm panel.
Low cost installation via standard electrical boxes.
Attractive flush or surface mounting options.
No additional trimplate required for flush
mounting.
Compliance with RFI limits in FCC Part 15, Class B
for compatibility with sensitive detection and
communication circuits.
Strobe markings for fire and suppression
applications.
IN and OUT wiring terminations that accept two
#12 to #18 AWG wires at each terminal.
Series MT Strobe
Series MT
without requiring additional coding means. With MT and MT
Strobe Signals, one alarm appliance meets most of your signaling needs.
The MT Strobes are designed for ADA (Americans with Disabilities Act) applications with maximum performance, reliability and cost-effectiveness while meeting or exceeding the
latest requirements of NFPA 72 (the National Fire Alarm
Code), ANSI 117.1 (the American National Standard of Accessible and Usable Buildings and Facilities) and UL Standard 1971 (Standard for Signaling Devices for the Hearing
Impaired). MT strobes, when properly specified and installed
in accordance with NFPA/ANSI Standards, can provide the
Equivalent Facilitation allowed under ADA Accessibility
Guidelines (ADAAG General Section 2.2) by meeting or exceeding the illumination which results from the ADA specified strobe intensity of 75 candela at 50 feet. This is an
illumination of 0.030 lumens per square foot (foot-candles).
Each MT and MT Strobe appliance has two user selective
sound output levels: STANDARD dBA and HIGH dBA. The
MT/MT 4 (horn only) provides dual voltage capability in one
unit, 12 VDC or 24 VDC operation, filtered or FWR. The MT
Strobe Electronic Signals operate with 24 VDC and may be
used with filtered or unfiltered (full-wave-rectified) input voltages. Separate input terminals are available, shunt wires
are provided to enable both tone and strobe to operate simultaneously from a single input.
The Multitone Strobe Signals are UL Listed for indoor use,
ceiling and wall mount, under Standard 1971 for Emergency Devices for the Hearing Impaired and Standard 464
for Audible Signal Appliances, and use a Xenon flashtube
with solid state circuitry enclosed in a rugged Lexan® lens
to provide maximum reliability for effective visible signaling.
DESCRIPTION
Fenwal’s MT and MT Strobe Series Multitone electronic signals offer a choice of (8) nationally and internationally recognized alerting sounds: Horn, Bell, March Time Horn,
Code-3 Tone, Code-3 Horn, Slow Whoop, Siren or Hi/Lo
Tone. Our Code-3 horn and tone patterns are engineered to
comply with NFPA/ANSI Temporal Pattern specifications
1
Strobe lens markings available for “Fire” and “Agent”
labeled applications. Options include LS, MS, and IS Series
which are Listed at 15, 30, and 75 candela intensity to
cover 20’x20', 30’x30' and 40’x40' rooms, respectively. The
LSM Series 15/75 candela wall mounted strobes were
tested at UL for 75 candela on axis, and are listed at 15
candela under UL 1971 and meet 75 candela intensity on
axis for ADA guidelines with low current draw.
MT Series Signals have IN and OUT wiring terminations
that accept two #12-#18 American Wire Gage (AWG) wires
at each terminal. Inputs are polarized for compatibility with
standard reverse polarity type supervision.
ALARM TONES
Tone
Alarm Tones
Pattern Description
Horn
Broadband Horn (Continuous)
Bell
1560 Hz Modulated (0.07 sec. ON/Repeat)
March Time Horn
Horn (0.25 sec. ON/0.25 sec. OFF/Repeat)
Code-3 Horn
Horn (ANSI S3.41 Temporal Pattern)
Code-3 Tone
500 Hz (ANSI S3.41 Temporal Pattern)
Slow Whoop
500-1200 Hz SWEEP (4.0 sec. ON/0.5 sec. OFF/Repeat)
Siren
600-1200 HZ SWEEP (1.0 sec. ON/Repeat)
Hi/Lo
1000/800 (0.25 sec. ON/Alternate)
SPECIFICATIONS
Table 1. dBA and Current Ratings for Multitone Signals Without Strobes
Tone
Input Current1
AMPS @ 24 VDC
Input Current1
AMPS @ 12 VDC
Typical Anechoic2
d B A at 10 F eet
At Nominal
Input Voltage
Rated Reverberant dBA3
at 10 F eet P er U L 464
At Minimum
Input Voltage
At Nominal
Input Voltage
HI
S TD
HI
S TD
HI
S TD
HI
S TD
HI
S TD
Horn
0.040
0.023
0.100
0.020
101
95
88
82
91
85
Bell
0.014
0.012
0.031
0.010
94
89
82
75
85
79
March Time Horn
0.040
0.023
0.100
0.020
101
95
85
79
88
82
Code-3 Horn
0.040
0.023
0.100
0.020
101
95
85
75
85
79
Code-3 Tone
0.028
0.017
0.060
0.015
97
92
79
75
82
75
Slow Whoop
0.048
0.026
0.100
0.025
101
96
88
82
88
82
Siren
0.036
0.023
0.082
0.020
100
95
85
82
88
82
HI/LO
0.020
0.014
0.044
0.012
95
90
82
79
85
79
2
Table 2. dBA and Current Ratings for Audible Portionof Multitone Sinals with Strobes
Tone
Typical Anechoic2
d B A at 10 F eet
Input Current1
AMPS @ 24 VDC
Rated Reverberant dBA3
at 10 F eet P er U L 464
At Nominal
Input Voltage
At Minimum
Input Voltage
At Nominal
Input Voltage
HI
S TD
HI
S TD
HI
S TD
HI
S TD
Horn
0.040
0.023
99
93
85
79
88
82
Bell
0.014
0.012
92
87
79
75
82
75
March Time Horn
0.040
0.023
99
93
82
75
85
79
Code-3 Horn
0.040
0.023
99
93
79
75
82
75
Code-3 Tone
0.028
0.017
95
90
75
70*
79
73*
Slow Whoop
0.048
0.026
99
94
82
75
85
79
Siren
0.036
0.023
98
93
82
75
85
79
HI/LO
0.020
0.014
93
88
79
75
82
75
1. Add 25% more input current than shown in Tables 1 and 2 when operating the unit at maximum input voltage. Rated
input Voltage (either filtered DC or unfiltered full-wave-rectified (FWR): Multitone Signals set for 24 VDC operation are
UL rated to operate over a voltage range from 20 VDC to 31 VDC. Multitone Signals set for 12 VDC operation are UL
rated to operate over a voltage range of 12 VDC to 15.6 VDC. Check the minimum and maximum output for the power
supply and standby battery and subtract the voltage drop from the circuit wiring resistance to determine the applied
voltage to the strobes.
2. Anechoic dBA is measured on axis in a non-reflective (free field) test room using fast meter response. For peak dBA
(measured with peak meter response), add 5 dBA to typical anechoic values shown in Table 1 and 2.
3. Reverberant dBA is a minimum UL rating based on sound power measurements in a reverberant test room.
4. Multitone Signals with and without strobes have a brief in-rush current during start-up.
! WARNING
Multitone strobe models set on “code-3 tone” with “Standard dBA” do not meet the 75 dBA minimum UL
reverberant sound level required for public mode fire protection service (noted by * in Table 2). Models with
settings which produce less than 75 dBA may not be heard. This setting is acceptable only for general
signaling (non-fire alarm) use. Use the “high” dBA setting with this tone or use a different tone for public
mode service.
Table 3. Strobe Current Requirement (AMPS)
Rated Average Current
Rated Peak Current
Rated Inrush Current
Voltage
Note:
LS
MS
LS M
IS
LS
MS
LS M
IS
LS
MS
LS M
IS
20 V D C
.080
.135
.115
.240
.160
.288
.250
.500
.210
.280
.225
.650
24 V D C
.080
.135
.115
.225
.190
.296
.260
.450
.250
.280
.270
.660
31 V D C
.080
.135
.115
.195
.210
.296
.260
.370
.320
.300
.360
.880
20 VFWR
.080
.135
.125
.253
.210
.390
.350
.700
.320
.390
.315
.920
24 VFWR
.081
.135
.125
.233
.216
.390
.365
.640
.380
.390
.380
.930
31 VFWR
.091
.135
.125
.196
.240
.390
.365
.520
.450
.420
.500
1.25
All VFWR voltages in table are measured in DC volt meter. Multiply VFWR voltage by 1.11 to convert to VRMS.
Use the highest value of rated average current to determine the maximum number of strobes and to establish
power supplies and wire gauge requirements. Use the rated peak current or rated inrush current (whichever is
higher) to verify fuse requirements.
Make sure that the average, peak and inrush currents do not exceed system power supplies or fusing limits. If
the strobe and audible operate on the same circuit, add the strobe current from Table 3 to the proper audible
current from Table 1 or 2. See “Installation Instructions.”
3
sity. LSM Series strobes are designed only for wall mounting,
in a vertical orientation, in accordance with NFPA/ANSI room
and corridor requirements for 15 candela strobes, yet meet a
75 candela ADA guideline with low current draw.
STANDARD MULTITONE - UL 1971 STROBES
MT-LS SERIES
LS Series strobes are listed at 15 candela intensity, with a
light dispersion pattern that exceeds UL 1971 requirements
and meets NFPA/ANSI requirements for indirect viewing in
rooms and direct viewing in corridors. One LS Series strobe
will cover a 20’x20' room when properly wall mounted in accordance with NFPA/ANSI Standards.
GENERAL NOTES:
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MT-MS SERIES
For larger areas, Fenwal’s MS Series strobes are listed at
30 candela intensity. One MS Series strobe will cover a
30’x30' room when properly wall mounted per NFPA/ANSI
Standards.
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MT-IS SERIES
IS Series strobes are listed at 75 candela intensity. One IS
Series strobe will cover a 40’x40' room when properly wall
mounted per NFPA/ANSI Standards.
Strobes are designed to flash at 1 flash per second minimum from 20-31 VDC.
All candela ratings represent minimum effective Multitone
Strobe intensity based on UL 1971.
MT Strobe models are UL 1971 listed for indoor use with
a temperature range of 32° F to 120° F (0° C to 49° C)
and maximum humidity of 85% RH.
MT4-12/24 audibles are UL464 listed for outdoor use with
temperatures range of - 31½F to 150½(-35½C to 66½C)
and a maximum humidity of 95%.
! WARNING
Use strobes only on circuits with continuously
applied operating voltage. Do not use strobes on
coded or interrupted circuits in which the applied
voltage is cycled on and off, as the strobe may
not flash.
SPECIAL APPLICATIONS MULTITONE - UL
1971 STROBE
MT-LSM SERIES
LSM Series strobes are also listed at 15 candela intensity
under UL 1971 and exceeds a near-axis 75 candela inten-
ORDERING INFORMATION
Model Number
Part Number
Input Voltage
Rated Candela
Strobe Label
Mounting Options
MT-12/24-R
75-000010-001
12/24
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B,H,I,J,K
MT4-12/24-R
75-000010-002
12/24
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A,E,J
MT-24-LS-VFR
75-000011-001
24
15
FIRE
B,H,I,J,K
MT-24-LS-VAR
75-000011-004
24
15
AGENT
B,H,I,J,K
MT-24-LSM-VFR
75-000012-001
24
15/75
FIRE
B,H,I,J,K
MT-24-LSM-VAR
75-000012-004
24
15/75
AGENT
B,H,I,J,K
MT-24-MS-VFR
75-000013-001
24
30
FIRE
B,H,I,J,K
MT-24-IS-VFR
75-000014-001
24
75
FIRE
B,H,I,J,K
MT-24-IS-VAR
75-000014-002
24
75
AGENT
B,H,I,J,K
MOUNTING OPTIONS
Model
Number
Part
Number
Input
Voltage
Rated
Candela
Strobe
L ab el
Mounting
Options
DBB-R
75-000000-009
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A
ISP-R
75-000000-002
---
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B
WBB-R
75-000000-008
---
---
---
E
IOB-R
75-000000-001
---
---
---
H
RP-R
75-000000-003
---
---
---
J
Note: For complete installation option refer to the Alarm Signals Installation Data Sheet (75-008.A)
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! WARNING
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Contact Fenwal for “Installation Instructions” and “General Information” sheet on these products. These
materials contain important information that should be read prior to specifying or installing these products,
including:
Total current required by all devices connected to system primary and secondary power sources.
Fuse ratings on signaling circuits to handle maximum inrush or peak currents from all devices on those circuits.
Composite flash rate from multiple strobes within a person’s field of view.
Installation in office areas and other specification and installation issues.
Use strobes only on circuits with continuously applied operating voltage. Do not use strobe on coded or interrupted
circuits in which the applied voltage is cycled on and off as the strobe may not flash.
Failure to comply with the installation instructions or general information sheets could result in improper installation,
application, and/or operation of these products in an emergency situation, which could result in property damage and
serious injury or death to you and/or others.
Combination audible/visual signals shall incorporate a Xenon flashtube enclosed in a rugged Lexan lens or equivalent with sold state circuitry. Strobe shall meet UL 1971 and
produce a flash rate of one (1) flash per second minimum
over the listed input voltage (20 VDC-31VDC) range. The
strobe intensity shall be rated per UL 1971 for 15, 30 or 75
Candela. The LSM Series 15/75 candela strobe shall be
specified when 15 candela UL 1971 Listing with 75 candela
intensity near-axis is required.
All UL 1971 listed strobe appliances shall be verified to meet
FCC Part 15, Class B and incorporate low temperature compensation to insure the lowest possible current consumption. Strobe activation shall be via independent input or from
the same input circuit as the audible.
The combination audible/visual appliances may be installed
indoors and surface or flush mounted. They shall mount to
standard electrical hardware requiring no additional trimplate
or adapter. The aesthetic appearance shall not have any
mounting holes or screw heads visible when the installation
is completed. The appliance shall be finished in a textured
red color.
The audible device may be installed indoors or outdoors with
the proper backbox.
ARCHITECTS AND ENGINEERS
SPECIFICATIONS
The notification appliance shall be a Fenwal MT Series audible/visual device or equivalent. Notification appliance shall
be electronic and use solid state components. Electromechanical alternatives are not approved. Each electronic signal shall provide eight (8) field selectable alarm tones. The
tones shall consist of: TONE, HORN, MARCH TIME HORN,
CODE-3 HORN, CODE-3 TONE, SLOW WHOOP, SIREN
AND HI/LO. Tone selection shall be by durable dip switch
assembly and not clips or jumpers. The audible and the
strobe shall be able to operate from a single signaling circuit
while producing any of these tones. The device shall provide two output sound levels: STANDARD and HIGH dBA.
The HIGH dBA setting shall provide a minimum 5dBA increase in sound output at nominal voltage. The HIGH
anechoic dBA measurement at 10 feet at the alarm HORN
SETTING shall be 101 dBA minimum for MT and 99 dBA
minimum for MT Strobes, at nominal voltage. Operating voltages shall be 24 VDC using filtered power or unfiltered power
supply (full-wave-rectified). All models shall have provisions
for standard reverse polarity type supervision and IN/OUT
field wiring using terminals that accept #12 to #18 AWG wiring.
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This literature is provided for informational purposes only. KIDDE-FENWAL,INC. assumes no
responsibility for the product's suitability for a particular application. The product must be properly applied to work correctly.
If you need more information on this product, or if you have a particular problem or question,
contact KIDDE-FENWAL INC., Ashland, MA 01721. Telephone: (508) 881-2000
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KIDDE-FENWAL, INC.
400 MAIN STREET, ASHLAND, MA 01721
TEL: (508) 881-2000 FAX: (508) 881-8920
www.fenwalfire.com
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Protection Systems
75-001
8/99
©1999Kidde-Fenwal, Inc.
Printed in U.S.A.
CP