Wheelock SM, DSM Specification
Series SM and DSM Sync Modules
THE CITY OF
NEW YORK
DEPARTMENT OF BUILDINGS
U
L
®
Series SM or DSM
Description
The Wheelock Series SM and DSM Sync Modules are utilized
with the Series AS/AH, Series NS/NS4/NH, Series RSS, Series
RSSP, Series SLM and selected strobe applications with other
Wheelock combination appliances.
When used with Series AS Audible Strobes and/or Series
NS Horn Strobes, the SM and DSM Sync Modules provide
independent operation of synchronized temporal pattern (code
3) horn and synchronized strobe flash, as well as the ability to
silence the horn while maintaining the strobe flash. while using
only a single pair of wires. The sync modules are available in
two versions; the SM-12/24 for control of a Class B NAC circuit;
and a dual output version, the DSM-12/24 for control of either a
Class A or two (2) Class B NAC circuits.
Features
• Approvals include: UL Standard 1971, ULC, New York City
(MEA), California State Fire Marshal (CSFM) and Chicago
(BFP)
• Uniquely designed to accept an independent strobe and
audible input from the FACP and convert to a single output
that connects to Wheelock’s Series AS or Series NS family of
audible strobes
• Series SM and DSM Sync Modules can also be used to
synchronize Wheelock’s Series RSS, RSSP and SLM Sync
Strobes
• 3 ampere per circuit current handling at 12 or 24 VDC
• Low operating current draw
• Compatible with all standard fire alarm control panels
• Meets the NFPA-72 requirement for Temporal Pattern when
used with the Series AS/AH and/or Series NS/NS4/NH
• 3 year warranty
E5946
FIRE ALARM
CONTROL PANEL
(FACP)
151-92-E
7300-0785:132
POWERPATHCP
POWERPATHMP
OR
SM OR DSM
OTHER POWER
BOOSTERS
SM or DSM Connection Diagram with Power Booster
AS/AH, NS, HS4/HS
NH, RSS, RSSP,
E w/STB, ET w/STB,
CH w/STB
APPLIANCES
Table 1: Sync Module (SM) Current Requirements (AMPS) Table2: Sync Module (DSM) Current Requirements (AMPS)
UL
Voltage
8.0 VDC 10.5 VDC 0.017 0.004 0.055 0.004 0.140 0.016 8.0 VDC 10.5 VDC 0.019 0.004 0.055 0.004 0.150 0.016
12.0 VDC 12.0 VDC 0.017 0.004 0.060 0.004 0.160 0.019 12.0 VDC 12.0 VDC 0.020 0.004 0.064 0.004 0.170 0.019
24.0 VDC 24.0 VDC 0.028 0.008 0.070 0.008 0.320 0.030 24.0 VDC 24.0 VDC 0.035 0.008 0.080 0.008 0.342 0.030
33.0 VDC 33.0 VDC 0.038 0.010 0.080 0.010 0.440 0.040 33.0 VDC 33.0 VDC 0.045 0.010 0.090 0.010 0.470 0.040
8.0 VRMS 8.0 VRMS 0.026 0.006 0.085 0.008 0.210 0.016 8.0 VRMS 8.0 VRMS 0.028 0.005 0.107 0.008 0.210 0.016
12.0 VRMS 12.0 VRMS 0.028 0.006 0.090 0.009 0.225 0.019 12.0 VRMS 12.0 VRMS 0.030 0.006 0.103 0.009 0.240 0.019
24.0 VRMS 24.0 VRMS 0.040 0.010 0.120 0.015 0.446 0.033 24.0 VRMS 24.0 VRMS 0.048 0.010 0.145 0.015 0.480 0.033
33.0 VRMS 31.0 VRMS 0.055 0.012 0.150 0.022 0.645 0.056 33.0 VRMS 31.0 VRMS 0.062 0.012 0.175 0.022 0.685 0.056
NOTE: All CAUTIONS and WARNINGS are identified by the symbol . All warnings are printed in bold capital letters.
ULC
Voltage
Rated Average
Current
In1 Audible In1 Audible In1 Audible In1/In2 Audible In1/In2 Audible In1/In2 Audible
Rated Peak
Current
Rated Inrush
Current
UL
Voltage
ULC
Voltage
Rated Average
Current
Rated Peak
Current
Rated Inrush
Current
WARNING: PLEASE READ THESE SPECIFICATIONS AND 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.
WARNING: MAKE SURE THAT THE TOTAL CURRENT REQUIRED BY ALL APPLIANCES THAT ARE CONNECTED TO A SM OR DSM DOES
NOT EXCEED 3.0A OR EXCEED THE RATING OF THE FIRE ALARM CONTROL PANEL’S PRIMARY AND SECONDARY POWER SOURCES AND
NAC CIRCUITS. OVERLOADING THESE SOURCES COULD RESULT IN LOSS OF POWER AND FAILURE TO ALERT OCCUPANTS DURING AN
EMERGENCY, WHICH COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY OR DEATH TO YOU AND/OR OTHERS.
When calculating the total current, use Tables 1& 2 to determine the highest value of “Rated Average Current” for the SM or DSM (across the listed voltage range), then add this value to the total current for any other appliances powered by the same source and include any required safety factors. Refer
to Instruction Sheet for addtional information.
WARNING: MAKE SURE THAT ALL FUSES USED ON NAC CIRCUITS ARE RATED TO HANDLE THE MAXIMUM INRUSH OR PEAK CURRENT
FROM ALL APPLIANCES ON THOSE CIRCUITS. FAILURE TO DO THIS MAY RESULT IN LOSS OF POWER TO THE NAC CIRCUIT AND THE
FAILURE OF ALL APPLIANCES ON THAT CIRCUIT TO OPERATE, WHICH COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY OR
DEATH TO YOU AND/OR OTHERS.
Table 3: Current Consumption of the SM and DSM Modules
Outpurt Circuit Description of SM/DSM Module
SM
Module
DSM
Module
Ref. Fig.
Class “B” with Audible Silence (single circuit) Y 1
Class “B” with No Audible Silence (single circuit) Y 2
Class “B” with Audible Silence (dual circuit) Y 3
Class “B” with No Audible Silence (dual circuit) Y 4
Class “A” with Audible Silence (single circuit) Y 5
Class “A” with No Audible Silence (single circuit) Y 6
Note: SM Sync Modules are rated for 3.0 amperes at 12/24 VDC; DSM Dual Sync Modules are rated for 3.0 amperes per circuit. The
maximum number of interconnected DSM modules is twenty (20).
CAUTION: Use SM or DSM Sync Modules only on NAC circuits with continuously applied voltage. Do not use SM or DSM Sync
Modules on coded or interrupted NAC circuits in which the applied voltage is cycled on and off.
CAUTION: Power Boosters may be used in conjunction with the SM or DSM Sync Modules only in the order shown below. Only
one SM or DSM Sync Module shall be allowed on a NAC circuit. Do not connect Power Booster to the NAC circuit after the one SM
or DSM Sync Module. Exception: The Wheelock PS-24-8MC Power Booster can be connected either before or after the SM or DSM
Sync Module. Refer to Power Booster instruction manual for proper application and installation.
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