System Sensor P24, S24 User Manual

D900-25-00 1 I56-0981-001R

INSTALLATION AND MAINTENANCE INSTRUCTIONS

3825 Ohio Avenue, St. Charles, Illinois 60174

1-800-SENSOR2, FAX: 630-377-6495

www.systemsensor.com

Specifications

Voltage Range: DC or Full-Wave Rectified

Strobes and Horn/Strobes: 24-volt models – 20 to 30 volts (with MDL module): 24-volt models – 21 to 30 volts

NOTE: Combo unit will operate on walk tests with on-time durations of 1 sec. or greater.

Flash Rate: 1 Flash Per Second Operating Temperature: 32° F to 120° F (0° C to 49° C) Light Output: 75 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 S4011 (Horn/Strobe), UL S3593 (Strobe)

/2 Sec.

Off

/2 Sec.

Off

/2 Sec.

11/2 Sec.

Off

Rep

General Description

The SpectrAlert series notification appliances are designed to meet the requirements of NFPA, The National Fire Alarm Code, and UL. Also, check with your local Authority Having Jurisdiction for other codes or standards that may apply.

This SpectrAlert S2475XXX Series Strobe and P2475XXX Series style Horn/Strobe can be installed in systems using 24-volt panels having DC or full-wave rectified (FWR) power supplies. The models can also be installed in systems requiring synchronization (module MDL 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 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:

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 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”).

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

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 acceptable voltage drop.

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

SpectrAlert Strobe and Horn/Strobe

For use with the following 24-volt models: Strobes: S2475RLP, S2475ALP, S2475GLP, S2475BLP Horn/Strobes: P2475RLP, P2475ALP, P2475GLP, P2475BLP

Lens colors: “RLP” for Red, “ALP” for Amber, “GLP” for Green, “BLP” for Blue The “P” suffix indicates no markings on the housing; add suffix “W” for white housing models. 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; 5,593,569; 5,598,139; 6,049,446; 6,133,843

D900-25-00 2 I56-0981-001R

Strobe:

Sound Output Guide UL Reverberant Room dBA@ volts DC Anechoic dBA @10 ft./volts DC

20 24 30 20 24 30

Temporal Low Volume Electromechanical 75 75 79 94 96 98

3000 Hz Interrupted 75 79 79 94 96 98

High Volume Electromechanical 82 82 82 100 101 102

3000 Hz Interrupted 82 85 85 100 101 102

Non- Low Volume Electromechanical 79 82 85 94 96 98 Temporal 3000 Hz Interrupted 82 82 85 94 96 98

High Volume Electromechanical 85 88 88 100 101 102

3000 Hz Interrupted 88 88 88 100 101 102

(+)

(–)

(+)

(–)

E O L

(+)

(–)

(+)

(–)

HORN/STROBEHORN/STROBE

STROBE ONLY

Figure 1A. Any combination of models powered by a 2-wire circuit:

System Operation: Non-Synchronized Devices

FROM: FACP, MODULE OR PREVIOUS DEVICE

TO NEXT

DEVICE OR

EOL

(+)

(+) (+)

(–)

TANDEM OPERATION

HORN/STROBE COMBO

FACTORY INSTALLED JUMPERS

Figure 1B: Horns and strobes powered in tandem:

NOTE: Supply power must be continuous for proper operation.

Current Draws

Horn/Strobe:

DC FWR DC FWR DC FWR

169 220 140 191 115 174

AVERAGE CURRENT (mA)

24V Models

20V 24V 30V

DC FWR DC FWR DC FWR

460 560 450 570 420 620

PEAK CURRENT (mA)

24V Models

20V 24V 30V

DC FWR DC FWR DC FWR

190 230 220 290 290 370

IN RUSH CURRENT (mA)

24V Models

20V 24V 30V

DC FWR DC FWR DC FWR

188 241 165 209 144 200 186 238 163 211 145 202 180 232 153 204 132 189 181 232 154 204 132 190 193 246 168 214 152 207 188 242 167 217 150 210 183 234 157 206 136 193 182 232 156 205 137 195

High/Low Volume

Temp /Non

Electromech.

Temp Non Temp Non Temp Non Temp Non

3000 Hz Interrupt.

AVERAGE CURRENT (mA)

24V Models

20V 24V 30V

Tone

High Low High Low

Horn Selections

Horns are factory set for high volume, temporal code, and electromechanical tone. Tones:

Tw o tones may be selected using the jumper plugs located on the printed circuit board. With the jumper offset, the tone is the Electromechanical sound. With the jumper in place, the tone is a 3 kHz sound.

Temp/Non-Temp:

Temporal coding or Non-Temporal coding can be selected using the jumper plugs located on the printed circuit board. With the jumper offset, the tone pattern is the Temporal Coded Signal. With the jumper in place, the Non-Temporal code (continuous) tone is active.

NOTE: When powered from FWR supply, the tones will be modulated

(turned on and off) by 120Hz, causing the tones to sound different from DC power.

High/Low Volume:

High or low volume may be selected using the jumper plugs located on the printed circuit board. With the jumper in place, the sound output level is the high level. With the jumper offset, the sound output level is the low level. The low volume setting must NOT be used when the device is powered from a 12-volt panel.

NOTE: Always power down devices before setting jumpers.

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