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

ledoM

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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tupnI

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CDV

21710.W

42820.W

21020.W

42530.W

AS/AH, NS/NS4/NH,

HS, RSS, RSSP,

E w/STB, ET w/STB,

CH w/STB

APPLIANCES

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R = Red

Copyright 2005 Wheelock, Inc. All rights reserved.

54

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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.

55

SYNC MODULE

END OF LINE
RESISTOR (EOLR)

SYNC MODULE

F
A

C
P

+

-

+

-

STROBE SIGNAL
CIRCUIT #1

AUDIBLE SIGNAL
CIRCUIT #1

OUT1

+

IN1

+

MINUS1

AUDIBLE

+

AUDIBLE

-

APPLIANCE

FIG. 1 SINGLE CLASS “B” CIRCUIT WITH

AUDIBLE SILENCE FEATURE

+

-

F

+

A
C

-

P

+

-

STROBE SIGNAL
CIRCUIT #1

AUDIBLE SIGNAL
CIRCUIT #1

STROBE SIGNAL
CIRCUIT #2

DUAL SYNC MODULE

SYNC
SYNC

OUT1

+

IN1

+

MINUS1

+

AUDIBLE

AUDIBLE

-

OUT2

+

IN2

+

MINUS2

+

-

END OF LINE
RESISTOR (EOLR)

APPLIANCE

+ -

APPLIANCE

FIG. 3 DUAL CLASS “B” CIRCUIT WITH

AUDIBLE SILENCE FEATURE

OUT1

-+

+

TO NEXT APPLIANCE
OR EOLR

-

F

+

A

-

C
P

SIGNAL
CIRCUIT #1

+
+

MINUS1

AUDIBLE

+

AUDIBLE

-

IN1

APPLIANCE

-+

+

TO NEXT APPLIANCE
OR EOLR

-

FIG. 2 SINGLE CLASS “B” CIRCUIT WITH NO

AUDIBLE SILENCE FEATURE

DUAL SYNC MODULE

-+

+

TO NEXT APPLIANCE
OR EOLR

­+

TO NEXT APPLIANCE
OR EOLR

-

+

-

F
A

SIGNAL

C

CIRCUIT #1

P

+

-

SIGNAL
CIRCUIT #2

+

-

+
+

MINUS1

+
+

MINUS2

SYNC

SYNC
OUT1
IN1

AUDIBLE

AUDIBLE

OUT2
IN2

+

-

APPLIANCE

+

+

APPLIANCE

-

-

+

TO NEXT APPLIANCE
OR EOLR

-

+

TO NEXT APPLIANCE
OR EOLR

-

FIG. 4 DUAL CLASS “B” CIRCUIT WITH NO

AUDIBLE SILENCE FEATURE

DUAL SYNC MODULE

SYNC

+

-

SYNC

OUT1

+

IN1

+

MINUS1

+

AUDIBLE

AUDIBLE

-

OUT2

+

IN2

+

MINUS2

+

APPLIANCE

AUDIBLE SILENCE FEATURE

-

APPLIANCE

+

-

+

F

-

A

+

C

-

P

+

-

DUAL SYNC MODULE

SYNC

+

-

STROBE SIGNAL
CIRCUIT OUT

AUDIBLE SIGNAL
CIRCUIT OUT

AUDIBLE SIGNAL
CIRCUIT RETURN

STROBE SIGNAL
CIRCUIT RETURN

SYNC

OUT1

+

IN1

+

MINUS1

+

AUDIBLE

AUDIBLE

-

OUT2

+

IN2

+

MINUS2

+

APPLIANCE

FIG. 5 SINGLE CLASS “A” CIRCUIT WITH

AUDIBLE SILENCE FEATURE

+

-

F
A

SIGNAL

C

CIRCUIT OUT

P

-

+

APPLIANCE

-

+

-

SIGNAL
CIRCUIT RETURN

FIG. 6 SINGLE CLASS “A” CIRCUIT WITHOUT

Notes

1. Non-Sync Appliances can be inst alled before or after a SM or DSM. If the Non-Sync appliance requires audible silence, four wire
connection is necessary with the strobe circuit connected before the SM or DSM NAC circuit, and the audible leads connected to a
silenceable NAC circuit from the FACP.

2. The audible appliance produces a momentary interruption (approximately 25ms) each time the strobes flash.

3. Circuit #2 may be omitted if only 1 circuit is required when using the DSM.

4. Non-Sync Audible Appliances can be installed on the audible NAC. Be aware of the current requirement for the SM or DSM module.
See table 3.

-

+

56

WARNING: THESE APPLIANCES WERE TESTED TO THE OPERATING VOLTAGE LIMITS OF 8-33 VOLTS USING FILTERED DC OR
UNFILTERED FULL-W A VE RECTIFIED (FWR). DO NOT APPL Y 80% AND 1 10% OF THESE VOL T AGE V ALUES FOR SYSTEM OPERA TION. THE
APPLICATION OF IMPROPER VOLTAGE MA Y RESULT IN DEGRADED OPERATION OR DAMAGE TO THESE PRODUCTS, WHICH COULD
RESULT IN PROPERTY DAMAGE AND SERIOUS INJUR Y OR DEATH TO YOU AND/OR OTHERS.

Wheelock products must be used within their published specifications and must be PROPERL Y specified, applied, inst alled, 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 (NFP A), 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).

WARNING: CONT ACT WHEELOCK FOR “INST ALLATION INSTRUCTIONS”
(P83123-SM & P83177-DSM) AND “GENERAL INFORMA TION” SHEET ON THESE PRODUCTS. These documents do undergo periodic changes.
It is important that you have current information on these products. These materials contain import ant information that should be read prior to
specifying or installing these products including:

• TOT AL CURRENT REQUIRED BY ALL APPLIANCES CONNECTED TO SYSTEM SECONDAR Y POWER SOURCES.

• FUSE RATINGS ON NAC CIRCUITS T O HANDLE MAXIMUM INRUSH OR PEAK CURRENTS FROM ALLAPPLIANCES ON THOSE NAC

CIRCUITS.

• COMPOSITE FLASH RATE FROM MUL TIPLE STROBES WITHIN A PERSON’S FIELD OF VIEW .

• THE VOLT AGE APPLIED T O THESE PRODUCTS MUST BE WITHIN THEIR RA TED IN PUT VOL TAGE RANGE.

• INSTALLA TION IN OFFICE AREAS AND OTHER SPECIFICA TION AND INST ALLA TION ISSUES.

• USE STROBES ONL Y ON NAC CIRCUITS WITH CONTINUOUSL Y APPLIED OPERATING VOLTAGE. DO NOT USE STROBE ON CODED OR

INTERRUPTED NAC CIRCUITS IN WHICH THE APPLIED VOL T AGE IS CYCLED ON AND OFF AS THE STROBE MAY NOT FLASH.

Architects and Engineers Specifications

The sync modules shall be Wheelock Series SM or DSM Sync Modules. Series SM or DSM Sync Modules shall be the
master controllers for Wheelock Series AS/AH, NS/NS4/NH, RSS, RSSP appliances where a synchronized audible/visual,
audible or visual only appliance is specified. All modules shall be ULC Listed under Standard ULC/CAN-S525-99 for Audible
Signaling Appliances. Series SM and DSM modules shall be designed to interface with Series AS Audible Strobe Appliances
and NS Horn Strobe Appliances to produce a synchronized temporal (Code 3) horn as well as synchronized strobe flash on a
two-wire alarm circuit. Other synchronized products are the Wheelock Series RSS, RSSP, visual only appliances and Series
AH and NH Horn Appliances.

SM Sync Module shall incorporate two input NAC circuits for power connection from the Fire Alarm Control Panel; one for the
strobe NAC circuit and one for the audible NAC circuit. DSM modules shall provide an additional strobe circuit input/output for
control of either two Class “B” NAC circuits or a single Class “A” NAC circuit. Upon activation of the audible silence function
at the Fire Alarm Control Panel, the audible signal component of Series AS Audible S trobe and/or the Series NS Horn S tobe
may be silenced while maintaining strobe activation.

Series SM or DSM module shall be designed and available in two versions; the SM-12/24 for control of a single Class B NAC
circuit and a dual output version, the DSM-12/24 for control of either Class A two (2) Class B NAC circuits. The DSM dual
circuit version shall provide the additional capability of “daisy-chaining”, that is, the ability to interconnect multiple DSM’s for
synchronous horn and strobe operation on multiple NAC circuits. Interconnection capability shall be for a maximum of 40 NAC
circuits. All modules shall operate on either 12 or 24 VDC. Rated average current requirement for the SM 12/24 shall be .017
amperes @ 12 VDC and .028 amperes @ 24 VDC. The DSM 12/24 shall be .020 amperes @ 12 VDC and .035 amperes @
24 VDC. A single circuit SM Sync Module shall be capable of handing a 3 ampere load at 12 or 24 VDC and the dual circuit
DSM Sync Module shall be capable of handling a load of 3 amperes per NAC circuit at 12 or 24 VDC.

All versions shall be polarized for DC supervision and shall incorporate screw terminals for in/out field wiring of #18 to #12 AWG
wire size. The SM and DSM Sync modules shall mount to a 4-11/16" x 2-1/8" deep backbox.

NOTE: Due to continuous development of our products, specifications and offerings are subject to change without notice in
accordance with Wheelock Inc. standard terms and conditions.

WE ENCOURAGE AND SUPPORT NICET CERTIFICATION

57

3 YEAR WARRANTY

NA TIONAL SALES OFFICE

800-631-2148

Canada 800-397-5777

E-Mail: [e-mail]

http://www.wheelockinc.com

273 BRANCHPORT AVENUE • LONG BRANCH, NJ 07740 • TEL: [phone] • FAX: [phone]

MADE IN THE USA

Distributed By:

S3000C 02/05