wheelock SM, DSM Service Manual

FIRE ALARM SYSTEMS

Description

Wheelock’s Series SM and DSM Sync Modules are utilized
with the Series AS/AH, Series NS/NS4/NH, Series RSS,
Series RSSP, and selected strobe applications with other
Wheelock combination appliances.

When used with Series AS Audible S trobes and/or Series
NS Horn Strobes, the SM and DSM Sync Modules provide
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.

Helping People Take Action

SERIES SM AND DSM

SYNC MODULES

Series SM or DSM

INC.

SM

Features

• Approvals include: ULC Listed under CAN/ULC-S525-99
for Audible Signaling Appliances.

• Uniquely designed to accept an independent strobe
an daudible input from the F ACP 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 and RSSP
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 NFP A-72 requirement for T emporal Pattern
when used with the Series AS/AH and/or Series
NS/NS4/NH.

• 3 year warranty .

FIRE ALARM

CONTROL PANEL

(FACP)

SM or DSM Connection Diagram with Power Booster

POWER

BOOSTERS

Specifications and Ordering Information

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R-42/21-MS9636

-MSD4736

R-42/21

*** Average current per actual Wheelock Production Listing
*** @ 12 & 24 VDC Nominal Voltage.
*** Refer to Data sheet # S7000 for Mounting Options.

*** The maximum number of interconnected DSM modules is
twenty (20).

*** The total distance from the first to the last DSM shall not

exceed 1,000 feet of #18 A WG wire. Use only #18 AWG wire.

SM OR DSM

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21710.W

42820.W

21020.W

42530.W

AS/AH, NS/NS4/NH,

HS, RSS, RSSP,

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CH w/STB

APPLIANCES

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Copyright 2005 Wheelock, Inc. All rights reserved.

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0400.0550.0400.0041.0610.0 CDV5.01 910.0400.0550.0400.0051.0610.0

CDV5.01 710.
CDV0.21 710.0400.0060.0400.0061.0910.0 CDV0.21 020.0400.04
CDV0.42 820.0800.0070.0800.0023.0030.0 CDV0.42 530.0800.0080.0800.0243.0030.0
CDV0.33 830.0010.0080.001

SMRV0.8 620.0600.0580.0800.0012.0610.0 SMRV0.8 820.0500.0701.0800.0012

SMRV0.21 820.0600.0090.0900.0522.0910.0 SMRV0.21 030.0600.0301.0900.0042.0910.0
SMRV0.42 040.0010.0021.0510.0644.03
SMRV0.13 550.0210.0051.0220.0546.0650.0 SMRV0.13 260.0210.0571.0220.0586.0650

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NOTE: All CAUTIONS and W ARNINGS are identified by the symbol . All warnings are printed in bold capital letters.

WARNING: PLEASE READ THESE SPECIFICATIONS AND INSTALLA TION INSTRUCTIONS CAREFULLY BEFORE USING, SPECIFYING
OR APPL YING THIS PRODUCT. FAILURE TO COMPL Y WITH ANY OF THESE INSTRUCTIONS, CAUTIONS AND W ARNINGS COULD RESULT
IN IMPROPER APPLICA TION, INST ALLATION AND/OR OPERA TION OF THESE PRODUCTS IN AN EMERGENCY SITUA TION, WHICH COULD
RESULT IN PROPERTY DAMAGE, AND SERIOUS INJURY OR DEATH TO YOU AND/OR OTHERS.

WARNING: MAKE SURE THA T THE T OTAL CURRENT REQUIRED BY ALL APPLIANCES THA T ARE CONNECTED TO A SM OR DSM DOES N OT
EXCEED 3.0A OR EXCEED THE RATING OF THE FIRE ALARM CONTROL PANEL’S PRIMAR Y AND SECONDAR Y 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 DEA TH TO YOU AND/OR OTHERS.

When calculating the total current, use T ables 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 THA T ALL FUSES USED ON NAC CIRCUITS ARE RA TED 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 OPERA TE, WHICH COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJUR Y
OR DEATH TO YOU AND/OR OTHERS.

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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). (Reference Instruction Sheets SM P83123; DSM P83177)

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.

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