System Sensor S1224MCK, P1224MCK, H1224K User Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS

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Repeats

SpectrAlert Selectable Output
Outdoor Strobes, Horn and Horn/Strobes

For use with the following models:
Strobe - 12/24 volt: S1224MCK
Combo - 12/24 volt: P1224MCK
Horn - 12/24 volt: H12/24K

“K” model series are outdoor rated when installed with System Sensor WBB.
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; 6,133,843; 6,522,261; 6,661,337; 6,793,375; 6,822,400; 5,931,569; 6,833,783; 6,838,997;

3825 Ohio Avenue, St. Charles, Illinois 60174

1-800-SENSOR2, FAX: [phone]

www.systemsensor.com

Specifications

Automatic selection for 12 or 24 volt rated operation (DC or Full-Wave Rectified)

Electrical

Horns, Strobes, and
Horn/Strobes Voltages: Regulated 12 DC/FWR and Regulated 24 DC/FWR
Operational Voltage Ranges: 12V=8-17.5 Volts; 24V=16-33 Volts
Synchronous Applications
with MDL Module: 12V=9-17.5 Volts; 24V=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
K Series Operating Temperature: Strobe, horn and horn/strobe models are indoor and outdoor listed, having a temperature

range of –40° F to 150.8° F (–40° C to 66° C)
All models are indoor/outdoor listed, strobes per UL 1971 and UL 1638, horns per UL 464.
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 S3593/S5512 (Strobe); UL S4011 (Combo); UL 1638 and UL 1971 (Strobe); UL50 (Horn)

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

S1224MCK and P1224MCK

incorporate a patented voltage booster design that has a more consistent flash bulb voltage over the range of candela

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, and
ULC. 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 12- or 24­volt panels having DC or full-wave rectified (FWR) power supplies.
The series can also be installed in systems requiring synchroniza
tion (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.

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 in
stalled 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 accom
plished by interrupting a steady sound in the following manner:

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Power Supply Considerations

Panels typically supply DC filtered voltage or FWR (full-wave
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 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.

Wire Sizes

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 device, it is nec

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essary 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”).

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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.

Example: Assume you have 10 devices on a zone and each re
quires 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/1,000 ft. x 2000 ft
=3 volts drop.

NOTE: If class “A” wiring is installed, the wire length may be up
to 4 times the single wire length in this calculation.

The same number of devices using 12 AWG wire will produce only
2 volts drop. The same devices using 18 AWG wire will produce
8 volts drop. Consult your panel manufacturer’s specifications, as
well as SpectrAlert’s operating voltage range to determine accept
able voltage drop.

Figure 1A: Current Draw Measurements (RMS)

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% low­end or 110% high-end voltage limits.

Strobe Current Draw

Candela
Setting

15

15/75

30

75

110

FWR

Operating

Current

Strobe

12V 24V 12V 24V

112 64 127 59

135 74 127 69

93 90

158 160

208 209

DC

Operating

Current

Strobe

NOTE: 12 VDC 2-wire horn/strobe current is shown in Figure 1D.
24VDC 2-wire horn/strobe current draw is shown in Figure 1E.
Horn/Strobe current draw can be calculated by adding the strobe
current draw (Figure 1A) for chosen candela setting to the horn
current draw (Figure 1C) for chosen setting.

Figure 1B: Horn Sound Measurements (dBA):

Selectable Horn Tones

Temporal Low

Non­Temporal

Volume

High
Volume

Low
Volume

High
Volume

Electromechanical 67 75

3000 Hz Interr upted 68 75

Electromechanical 71 80

3000 Hz Interr upted 72 81

Electromechanical

3000 Hz Interr upted 72 79

Electromechanical 76 84

3000 Hz Interr upted 77 86

8-17.5V 16-33V

71 79

Figure 1C: Horn Current Draw Measurements (RMS):

Selectable Horn Tones

Temporal Low

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Non­Temporal

Volume

High
Volume

Low
Volume

High
Volume

NOTE: Regulated 12 VDC, max operating current 44.4 mA
Regulated 24 VDC, max operating current 57.0 mA
12 V FWR, max operating current 45.7 mA

­ 24 V FWR, max operating current 57.5 mA

Electromechanical 15 23 13 23

3000 Hz Interr upted 15 33 13 23

Electromechanical 36 53 20 44

3000 Hz Interr upted 43 57 21 40

Electromechanical

3000 Hz Interr upted 16 32 18 33

Electromechanical 38 49 46 49

3000 Hz Interr upted 44 56 42 58

DC FWR

12V 24V 12V 24V

16 37 19 29

Figure 1D: 12VDC Horn/Strobe Current Draw
Measurements (mA RMS)

Temporal

Low Volume High Volume

Candela

Setting

15 111 111 112 112

15/75 127 127 126 129

15 113 112 114 115

15/75 128 128 130 134

Electromechanical 3000 Hz Electromechanical 3000 Hz

Non-Temporal

Figure 1E: 24VDC Horn/Strobe Current Draw
Measurements (mA RMS)

Temporal

Low Volume High Volume

Candela

Setting

15/75 86 85 87 88

110 209 209 210 213

15/75 86 88 93 96

110 213 213 218 222

Electromechanical 3000 Hz Electromechanical 3000 Hz

15 71 70 73 75

30 99 98 100 100

75 166 166 167 170

Non-Temporal

15 74 74 79 82

30 101 101 107 110

75 167 167 173 176

Candela equivalent at –40°C and below:

15cd 3cd
15/75cd 20cd
30cd 9cd
75cd 27cd
110cd 46cd

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