System Sensor SP3R1224MC, SP3W1224MC User Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS

SpectrAlert Selectable Output Series Wall Speaker/Strobes for Fire Protective Signaling Systems

For use with models: SP3R1224MC and SP3W1224MC. U.S. Patent Nos. 5,593,569; 5,914,665; 5,850,178; 5,598,139; 6,049,446; 6,127,935; 6,522,261; 6,856,241

Speciﬁcations: Speaker

Mechanical

Input Terminals: 12 to 18 AWG Speaker Size: 4 inches (101 mm) Overall Dimensions: 8.25˝ × 4.9˝ Automatic selection for 12 or 24 volt rated operation (DC or Full-Wave Rectiﬁed)

Electrical

For 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 Flash Rate: 1 ﬂash per second Operating Temperature: 32° F to 120° F (0° C to 49° C) Storage Temperature: –20°C to 70°C Operational Humidity Range: 10 – 93% RH (non-condensing) Selectable Light Outputs: All candelas are selectable

via a manual slide switch. 12/24 Volt Applications: 15 or 15/75 candela

24 Volt Application: 15,15/75, 30, 75, 110 candela 15/75 is listed at 15 candela per UL 1971 but will pro

vide 75 candela on axis (straight ahead). 15, 30, 75,

or 110 are rated for that candela. Maximum Supervisory Voltage (Speaker): 50 VDC 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 S4048 (Speaker/Strobe)

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.

NOTE: The SP3 Series is suitable for dry and damp environments.

3825 Ohio Avenue, St. Charles, Illinois 60174

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

www.systemsensor.com

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

General Description

The SpectrAlert SP3 series speaker/strobes are designed to meet the requirements of most agencies governing these devices, including: NFPA, ADA, The National Fire Alarm Code, UL, CSFM, MEA. Also, check with your local Authority Having Jurisdiction for other codes or standards that may apply.

The SpectrAlert SP3 series speakers can be operated with distribution ampliﬁers having an output voltage of either 25 volts or 70.7 volts.

The speakers operate at any one of four input power levels. The output sound level is selected at the time of installation, but can be changed, if necessary.

The speaker is also equipped with a capacitive input to allow for DC supervision.

The SpectrAlert SP3 series strobe can be installed in systems using 12 or 24-volt panels having DC or full-wave rectiﬁed (FWR) power supplies. The strobes can also be installed in applications requiring synchronization (module MDL or compatible equivalent required) or applications that do not require synchronization (no module required).

Power Supply Considerations For Strobes

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 currents do not exceed the current capability of the panel. Calculations are based on using the device current found in Table 2 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 smaller 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.

D900-42-00 1 I56-2811-000R

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

TO NEXT STROBE OR EOL

INPUT FROM POWER SUPPLY

INPUT FROM AMPLIFIER

TO NEXT SPEAKER OR EOL

STROBESPEAKER

25.0V

70.7V

1/2W

1/4W

25.0V

70.7V

1/2W

1/4W

CORRECT

SW1

INCORRECT

CAUTION

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 × 10 devices × 3 ohms/1,000 ft. × 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.

Installation

All wiring must be installed in compliance with the National Electrical Code (NEC) and applicable local codes as well as special requirements of the authority having jurisdiction, using the proper wire size. This also includes all applicable NFPA Standards, ANSI/UL 1480, UL 1971 and NEC 760.

Electrical

1. Connect the speaker/strobe as shown in Figure 1. Keep in mind that even though the speaker and strobe are a single mechanical unit, they are electrically independent and require separate power sources.

NOTE: Do NOT loop electrical wiring under terminal screws. Wires connecting the device to the control panel must be broken at the device terminal connection in order to maintain electrical supervision.

Figure 1. Electrical connections:

2. See Figure 2 as an example of how to select a 1⁄4 Watt input when a 25 volt ampliﬁer is being used. Notice that the header, SW1, has two shunts. One shunt is used to select either 25 or 70.7 volts input. The other shunt is used to select input power of 1⁄4, 1⁄2, 1 or 2 Watts. Table 1 lists the UL reverberant and anechoic output sound levels for each power tap on the SP3 series speaker/strobes.

Figure 2. Speaker Voltage and Power Selection:

A0102-00

Table 1. Sound levels for each transformer power tap:

2W 1W 1/2W 1/4W

Reverberent

(dBS @10 ft.)

89 87 84 81

Signal levels exceeding 130% rated signal voltage can damage the speaker. Consequently, an incorrect tap connection may cause speaker damage. This means that if a 25V tap is selected when a 70.7V ampliﬁer is being used, speaker damage may result. Therefore, be sure to select the proper taps for the ampliﬁer voltage/input power level combination being used.

A0101-00

NOTE: Supply power for strobe must be continuous for proper operation.

Table 2. Strobe current draw measurements – 12/24 Volt applications:

NOTE: All 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.

Model No.

Speaker/Strobe SP3R1224MC SP3W1224MC

D900-42-00 2 I56-2811-000R

Candela Setting

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

FWR Operating

Current–Strobe

(mA RMS)

12V 24V 12V 24V

DC Operatng

Current–Strobe

(mA RMS)

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