System Sensor S1224MCP, S1224MCSP, P1224MC, S1224MCSPW, P1224MCW Installation And Maintenance Instructions Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS

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Repeats

SpectrAlert Selectable Output Strobes,
Horns, and Horn/Strobes

For use with the following models:
Strobes - 12/24 volt: S1224MC, S1224MCW, S1224MCSP, S1224MCSPW, S1224MCP, S1224MCPW
Combo - 12/24 volt: P1224MC, P1224MCW, P1224MCSP, P1224MCSPW, P1224MCP, P1224MCPW
Horns - H12/24, H12/24W

Suffix “W” indicates white housing models. Suffix “SP” indicates “FUEGO” (Spanish word for “FIRE”) lettering on housing.
Suffix “P” indicates plain housing (no lettering).
The Products to which this manual applies may be covered by one or more of the
following U.S. Patent numbers: 5,914,665; 5,850,178; 5,598,139; 6,049,446; 5,593,569, 6,133,843; 6,522,261

Specifications

Automatic selection for 12 or 24 volt rated operation (DC or Full-Wave Rectified)
Electrical
For Horns, Strobes, and Horn/Strobes
Voltages: Regulated 12 DC/FWR and Regulated 24 DC/FWR
Operational Voltage Ranges: 8-17.5 Volts and 16-33 Volts
Synchronous Applications
with MDL Module: 9-17.5 Volts and 17-33 Volts

NOTE: Horn units will operate on walk tests with on-time durations of .25 sec. or greater.

Flash Rate: 1 flash per second
Operating Temperature: 32° F to 120° F (0° C to 49° C)
Selectable Light Outputs: All candelas are selectable via a manual slide switch.
12/24 Volt Applications: 15 or 15/75 candela
24 Volt Application: 30, 75, 110 candela
15/75 is listed at 15 candela per UL 1971 but will provide 75 candela on axis (straight

ahead). 15, 30, 75, or 110 are rated for that candela.

Sound Output: Sound output levels are established at Underwriters Laboratories in their reverberant

room. Always use the sound output specified as UL Reverberant Room when compar­ing products.

Listings: UL S5512 (Strobe); UL S4011 (Combo)
Note for Strobes: Do not exceed: 1) 8-17.5 or 16-33 voltage range limit; 2) maximum number of 70

strobe lights when connecting the MDL Sync module with a maximum line imped­ance of 4 ohms per loop and; 3) maximum line impedance as required by the fire
alarm control manufacturer.

The models
P1224MCPW
benefit to the customer is a high quality strobe device.

S1224MC, S1224MCW, S1224MCSP, S1224MCSPW, S1224MCP, S1224MCPW, P1224MC, P1224MCW, P1224MCSP, P1224MCSPW, P1224MCP, and

incorporate a new patent-pending voltage booster design that has a more consistent flash bulb voltage over the range of candela selections. The

3825 Ohio Avenue, St. Charles, Illinois 60174

1-800-SENSOR2, FAX: [phone]

www.systemsensor.com

General Description

The SpectrAlert series notification appliances are designed
to meet the requirements of most agencies governing these
devices, including: NFPA, ADA, The National Fire Alarm
Code, UL, ULC, FM, CSFM, MEA. Also, check with your
local Authority Having Jurisdiction for other codes or stan­dards that may apply.

The SpectrAlert series can be installed in systems using 12­or 24-volt panels having DC or full-wave rectified (FWR)
power supplies. The series can also be installed in systems
requiring synchronization (module MDL or compatible
equivalent required) or systems that do not require syn­chronization (no module required).

NOTICE: This manual shall be left with the owner/user of
this equipment.

D900-28-00 1 I56-1796-008R

Fire Alarm System Considerations

Temporal and Non-Temporal Coded Signals:

The American National Standards Institute and the National
Fire Alarm Code require that all horns used for building
evacuation installed after July 1, 1996, must produce
Temporal Coded Signals.

Signals other than those used for evacuation purposes do
not have to produce the Temporal Coded Signal. Temporal
coding is accomplished by interrupting a steady sound in
the following manner:

Viewing Window

WARNING

Power Supply Considerations

Panels typically supply DC filtered voltage or FWR (full­wave rectified) voltage. The system design engineer must
calculate the number of units used in a zone based on the
type of panel supply. Be certain the sum of all the device

Typical wire size resistance:
18 AWG solid: Approximately 8 ohms/1,000 ft.
16 AWG solid: Approximately 5 ohms/1,000 ft.
14 AWG solid: Approximately 3 ohms/1,000 ft.

12 AWG solid: Approximately 2 ohms/1,000 ft.
currents do not exceed the current capability of the panel.
Calculations are based on using the device current found
in the subsequent charts and must be the current specified
for the type of panel power supply used.

Example: Assume you have 10 devices on a zone and each

requires 50 mA average and 2000 Ft. of 14 AWG wiring

(total length=outgoing +return). The voltage at the end

of the loop is 0.050 amps per device x 10 devices x 3 ohms/

Wire Sizes

1,000 ft. x 2000 ft =3 volts drop.

The designer must be sure that the last device on the circuit
has sufficient voltage to operate the device within its rated
voltage. When calculating the voltage available to the last

Note: If class “A” wiring is installed, the wire length may be

up to 4 times the single wire length in this calculation.

device, it is necessary to consider the voltage drop due to
the resistance of the wire. The thicker the wire, the less the
voltage drop. Generally, for purposes of determining the
wire size necessary for the system, it is best to consider all
of the devices as “lumped” on the end of the supply circuit
(simulates “worst case”).

The same number of devices using 12 AWG wire will pro-

duce only 2 volts drop. The same devices using 18 AWG

wire will produce 8 volts drop. Consult your panel manu-

facturer’s specifications, as well as SpectrAlert’s operating

voltage range to determine acceptable voltage drop.

Figure 1A: Current Draw Measurements

NOTE: All ‘S’ and ‘P’ models were only tested at the 8-17.5 and 16-33 Volt-FWR/DC limits. This does not include the

80% low-end or 110% high-end voltage limits.

FWR Operating

Current–Strobe

Model No.

S1224MC
Strobe

P1224MC
Horn/Strobe

H12/24 Horn 45.7 57.5 44.4 57 75

Candela
Setting

15 112 64 127 59
15/75 135 74 127 69
30 93 90
75 158 160
110 208 209
15 112 64 127 59 45.7 57.5 44.4 57 75
15/75 135 74 127 69 45.7 57.5 44.4 57 75
30 93 90 57.5 57 75
75 158 160 57.5 57 75
110 208 209 57.5 57 75

(mA RMS)

DC Operating

Current–Strobe

(mA RMS)

FWR Operating

Current–Horn

(mA RMS)

DC Operating
Current–Horn

(mA RMS)

Horn

Audibility

(dBA)12V 24V 12V 24V 12V 24V 12V 24V

Figure 1B: Selectable Horn Tones

Temporal Low Volume Electromechanical

3000 Hz Interrupted

High Volume Electromechanical

3000 Hz Interrupted

Non­Temporal

D900-28-00 2 I56-1796-008R

Low Volume Electromechanical

3000 Hz Interrupted

High Volume Electromechanical

3000 Hz Interrupted

Figure 2: Candela Selections

For strobe candela selection, adjust slide switch located on the rear of the prod­uct while watching the viewing window on the side of the reflector.

Permissible Candela Settings:

A0133-00

Candela

Setting

15 OK OK

15/75 OK OK

30 OK

75 OK

110 OK

Operating Voltage

12V 24V

NOTE: SpectrAlert selectable output strobes, set at 15 and 15/75cd, auto­matically work on both 12V and 24V power supplies.
NOTE: The strobe is not listed for 12V operating voltages when set to 30, 75
or 110 candelas. Use only those settings marked as OK in the chart above.

When using a 12V panel, this device will yield required light output only
in the 15 or 15/75 candela setting.