PRODUCT SPECIFICATION
924 Multi-Candela Horn/Strobe Appliance
ACTION MESSAGES
ADA
SYSTEMS
COMMUNICATIONS
Horn Strobe Appliance
Description:
DMP’s 2-Wire 924 Series Multi-Candela Horn/Strobe
Appliances offer a field selectable choice of four candela
settings and a selectable choice of either continuous horn or
temporal pattern (Code 3) tone when constant voltage
from the Fire Alarm Control Panel (FACP) is applied. Each
tone has 3 field selectable settings for dBA levels to choose
from.
• One DMP Multi-Candela Horn Strobe with field
selectable settings of: 15, 30, 75 or 110 Cd
• Selectable Continuous Horn or Temporal (Code 3)
• 3 Selectable dBA settings in both tones
• Patented 2-Wire Horn Strobe Appliance
These versatile Horn Strobe Appliances will satisfy virtually
all requirements for indoor, wall mount applications. The
companion 904 Horn also offers a selectable choice of
either continuous horn or temporal pattern (Code 3).
• Patented Universal Mounting Plate
• Wall Mount
• Compatible with all DMP 2-Wire products
All models may be synchronized when used in conjunction
with the DMP 831, 832 Sync Modules or the 508 Power
Supply with Sync Protocol. DMP’s synchronized strobes
offer an easy way to comply with ADA recommendations
concerning photosensitive epilepsy. Additionally, the Horn
may be silenced while maintaining strobe activation. All of
this, plus the ability to silence the horn is achieved by using
only 2 WIRES.
• Strobes produce 1 flash per second over the regulated
input voltage range.
• Synchronization with DMP 831, 832 Sync Modules or
508 Power Supply with DMP’s built-in sync protocol.
DMP’s 2-Wire, 924 Series Multi-Candela Horn Strobe
Appliances and 904 Horns (24 VDC) offer more features
with less current draw and Zero Inrush.
The 924 Series Multi-Candela Horn Strobes and 904 Horns
are designed for maximum performance, reliability and
cost-effectiveness while meeting or exceeding the latest
requirements of NFPA 72, ANSI 117.1, UL 1971 ,UL 464, as
well as meeting ADA recommendations concerning
photosensitive epilepsy.
•Approvals include: UL 1971, UL 464, and California
State Fire Marshal (CSFM),
•ADA/ NFPA/ANSI Compliant.
• Meets OSHA 29 Part 1910.165
Ordering Information
Model
924-MCW-81
924-MCW-51
904-81
904-51
904WP-81
831-81
• ZERO Inrush above Peak.
• Fast installation with IN I OUT screw terminals using
#12 to #18 AWG wires.
832-81
Description
Multi-Candela
Horn/Strobe
Multi-Candela
Horn/Strobe
Horn
Horn
Horn Weatherproof
Single Circuit
Sync Module
Dual Circuit
Sync Module
Voltage
Color
24 VDC
Red
24 VDC
White
24 VDC
24 VDC
Red
White
24 VDC
Red
12/24 VDC
Red
12/24 VDC
Red
• 24 VDC with wide New UL “Regulated Input Voltage" of
16-33VDC using filtered (DC) or unfiltered FWR
Voltage.
2500 N. Partnership Boulevard Springfield, MO 65803
www.dmpnet.com
Digital Monitoring Products
LT-0559 (3/01)
Mounting Options
Specifications
DMP Model 841, Option H, NATP
DMP Model 842, Option X, SHBB surface backbox
DMP Model 845, Option K, WBB backbox (904 Horn)
DMP Model 846, Option J, BB backbox
Option B - Single gang, flush
Option D, 4" square, flush
Option E, 4" square, deep flush
Option F, double gang, flush
Option G, double gang, surface
Option O, RP-R retrofit plate
Options R, SFP semi-flush plate
Option S, AP adapter plate
Refer to LT-0459 Fire Notification Mounting Accessories
Warning: Please read these specifications and associated
installation instructions carefully before using, specifying or
applying this product. Failure to comply with any of these
instructions, cautions and warnings could result in improper
application, installation 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.
General Notes:
• Strobes are designed to flash at 1 flash per second
minimum over the “Regulated Input Voltage Range" of 1633 VDC (for 24 VDC models). Note that NFPA-72 (1999)
specifies a flash rate of 1 to 2 flashes per second and ADA
Guidelines specify a flash rate of 1 to 3 flashes per second.
• All candela ratings represent minimum effective Strobe
intensity based on UL 1971.
• 924 Series Multi-Candela Strobe products are listed
under UL 1971 for indoor use with a temperature range
of 320F to 1200F (00C to 490C) and maximum humidity
of 85%.
“Regulated Input Voltage Range" is the newest terminology
used by UL to identify the voltage range. Prior to this change
UL used the terminology “Listed Voltage Range”.
Quick Reference Guide
Model
Number
Description
Wall
Mount
924-MCW-81
924-MCW-51
Multi-Candela
Horn/Strobe
Multi-Candela
Horn/Strobe
904-81
Horn
X
904-51
Horn
904WP-81
Horn
Weather-proof
Single Circuit
Sync Module
Dual Circuit
Sync Module
831-81
832-81
Ceiling
Mount
Voltage
16 VDC
24 VDC
33 VDC
Voltage
16 VDC
24 VDC
33 VDC
Voltage
16 VDC
24 VDC
33 VDC
924 Multi-Candela Current Ratings
Wall Mount Appliances (24 VDC)
Hi dBA Setting (99 dBA)
15cd
30cd
75cd
.095
.142
.242
.088
.120
.174
.099
.120
.152
Med dBA Setting (95 dBA)
15cd
30cd
75cd
.081
.128
.225
.068
.105
.157
.068
.090
.119
Low dBA Setting (90 dBA)
15cd
30cd
75cd
.077
.119
.222
.060
.090
.142
.055
.081
.109
110cd
.308
.224
.190
110cd
.296
.207
.157
110cd
.294
.200
.147
Note: Inrush Current Is less than Rated Peak Current
924 Multi-Candela Audible dBA Ratings
Reverberent dBA Anechoic dBA
@ 10 ft.
Description Volume per UL 464 @ 10 ft.
24 VDC
24 VDC
High
91
99
Continuous
M
e
d
8
8
95
Horn
Low
82
90
High
85
99
CODE 3
Med
82
95
Horn
Low
75
90
924 Multi-Candela Average Current (24 VDC)
Voltage
Hi
Med
Low
20 VDC
.035
.020
.014
24 VDC
.041
.024
.017
31 VDC
.053
.030
.021
Average current based on actual production Testing @ 16,
24 & 33 VDC.
Strobe Candela
Sync
24 VDC
Color
X
15/30/75/110
X
X
Red
X
15/30/75/110
X
X
White
X
-
X
X
Red
X
X
-
X
X
White
X
X
-
X
X
Red
X
-
X
X
Red
X
-
X
X
Red
924 Multi-Candela Product Specification
Digital Monitoring Products
2500 N. Partnership Blvd. Springfield MO 65803 800-641-4282
Wiring Diagrams
FROM PRECEDING APPLIANCE
OR FIRE ALARM CONTROL PANEL +
+
+
TO NEXT APPLIANCE
OR END-OF-LINE RESISTOR
-
SIGNAL
924 Multi-Candela Appliance Non-synchronized
Strobe
NAC
circuit
Class B circuit
831
+ STROBE
- STROBE
+ OUT
FACP
924
924
EOLR
904
- OUT
+ AUDIBLE
EOLR
Audible
NAC
circuit
- AUDIBLE
924 Multi-Candela Synchronized with Audible SilenceFeature
832
Class A circuit
+ SYNC
- SYNC
Audible NAC
circuit out
+ OUT
1
+ IN 1
924
924
904
924
924
904
MINUS 1
+ AUDIBLE
- AUDIBLE
+ OUT 2
+ IN 2
FACP
Audible NAC
circuit return
MINUS 2
924 Multi-Candela Synchronized without Audible Silence Feature
Audible NAC Circuit
832
924
924
904
-
924
924
904
832
924
924
-
924
924
832
924
924
904
924
924
904
Strobe NAC Circuit
+
FACP
Audible NAC Circuit
SYNC
Strobe NAC Circuit
+
SYNC
Audible NAC Circuit
Strobe NAC Circuit
+
-
SYNC
924 Multi-Candela Synchronized with Multiple Sync Modules
924 Multi-Candela Product Specification
2500 N. Partnership Blvd Spirngfield MO 65803 800-641-4282
Digital Monitoring Products
DMP products must be used within their published
specifications and must be PROPERLY specified, applied,
installed, operated, maintained and operationally tested in
accordance with their installation instructions at the time of
installation and at least twice a year or more often and in
accordance with local, state and federal codes, regulations
and laws. Specification, application, installation, operation,
maintenance and testing must be performed by qualified
personnel for proper operation in accordance with all of the
latest National Fire Protection Association (NFPA),
Underwriters’ Laboratories (UL), National Electrical Code
(NEC), Occupational Safety and Health Administration
(OSHA), local, state, county, province, district, federal and
other applicable building and fire standards, guidelines,
regulations, laws and codes including, but not limited to, all
appendices and amendments and the requirements of the
local authority having jurisdiction (AHJ).
Architects and Engineers Specifications
The notification appliances shall be DMP 924 Series MultiCandela Horn Strobe appliances and 904 Horn appliances
or approved equal. The 924 Series Multi-Candela shall meet
and be listed for UL Standard 1971 (Emergency Devices for
the Hearing-Impaired) for Indoor Fire Protection Service.
The 904 Horn shall be UL Listed under Standard 464 (Fire
Protective Signaling). The Horn/strobe shall be listed for
indoor use and both shall meet the requirements of FCC Part
15 Class B. All inputs shall be compatible with standard
reverse polarity supervision of circuit wiring by a Fire Alarm
Control Panel (FACP).
The Horn and Horn strobe shall be designed for 24 VDC, 2wire operation and, when synchronization is required, shall
be compatible with DMP’s 831 and 832 Sync Modules or
DMP’s 508 Power Supply with built-in Sync Protocol. The
strobes shall not drift out of synchronization at any time
during operation. If the sync module or Power Supply fails to
operate, (i.e., contacts remain closed), the strobe shall
revert to a non-synchronized flash-rate.
The appliance shall also be designed so that the audible
signal may be silenced while maintaining strobe activation
(when used with the DMP Sync Module, Dual Sync Module
or DMP Power Supply).
The 924 Series Multi-Candela Horn Strobe and 904 Horn
shall incorporate a Patented Universal Mounting Plate that
shall allow mounting to a single-gang, double-gang, 4-inch
square, 100mm European type backboxes, or the DMP
Model 842 Surface Backbox. If required, an NATP
(Notification Appliance Trimplate) shall be provided.
All notification appliances shall be backward compatible.
The Horn portion of the appliance shall have a minimum of
three (3) field selectable settings for dBA levels and shall
have a choice of continuous or temporal (Code 3) audible
outputs.
The strobe portion of the appliance shall produce a flash rate
of one (1) flash per second over the Regulated Input Voltage
Range of 16 to 33 VDC for 24 VDC models and shall
incorporate a Xenon flashtube enclosed in a rugged Lexan®
lens. The 924 Series Multi-Candela shall be of low current
design and shall have zero inrush. The strobe intensity shall
have a minimum of four (4) field selectable settings and shall
be rated per UL 1971 for: 15, 30, 75 or 110 candela (wall
mount versions). The switch for selecting the candela setting
shall be located on the rear of the appliance in order to
prevent tampering from unauthorized persons.
Digital Monitoring Products
2500 N. Partnership Boulevard Springfield, MO 65803 800-641-4282