System Sensor SP2R1224MC, SP2W1224MC User Manual
INSTALLATION AND MAINTENANCE INSTRUCTIONS
SpectrAlert Selectable Output Series
Wall Speaker/Strobes for
Fire Protective Signaling Systems
For use with models: SP2R1224MC, SP2W1224MC and SP2R1224MCP.
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
Specifications: Speaker
Mechanical
Input Terminals: 12 to 18 AWG (3.31 to 0.82 mm2)
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
Maximum Supervisory
Voltage (Speaker): 50 VDC
Sound Output:
Sound output levels are established at Underwriters
Listings: UL S5512 (Strobe); UL S4048
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 SP2 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
vide 75 candela on axis (straight ahead). 15, 30, 75, or
110 are rated for that candela.
Laboratories in their reverberant room. Always use the
sound output specified as UL Reverberant Room when
comparing products.
(Speaker/Strobe)
The models
voltage over the range of candela selections. The benefit to the customer is a high quality strobe device.
NOTICE: This manual shall be left with the owner/user of
this equipment.
General Description
The SpectrAlert SP2 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 SP2 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 SP2 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).
SP2R1224MC, SP2W1224MC and SP2R1224MCP
incorporate a new patent-pending voltage booster design that has a more consistent flash bulb
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 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.
D900-29-00 1 I56-1809-009R
25.0V
70.7V
2W
1W
1/2W
1/4W
25.0V
70.7V
2W
1W
1/2W
1/4W
CORRECT
SW1
SW1
INCORRECT
2 W 1 W 1/2 W 1/4 W
84 81 78 75
UL
Reverberant
(dBA @ 10 ft.)
2 W 1 W 1/2 W 1/4 W
87 84 81 78
Anechoic
(dBA @ 10 ft.)
CAUTION
EXAMPLE: Assume you have 10 devices on a zone and
TO NEXT
STROBE OR EOL
INPUT FROM
POWER SUPPLY
INPUT FROM
AMPLIFIER
TO NEXT
SPEAKER OR EOL
STROBESPEAKER
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 × 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:
Figure 2. Speaker Voltage and Power Selection:
A0102-00
Table 1. Sound levels for each transformer power tap:
A0103-00
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.
NOTE: Supply power for strobe must be continuous for
proper operation.
2. See Figure 2 as an example of how to select a
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 SP2 series speaker/strobes.
D900-29-00 2 I56-1809-009R
A0101-00
1
⁄4 Watt
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% lowend or 110% high-end voltage limits.
Model No.
SP2R1224MC
Speaker/Strobe
FWR Operating
Current–Strobe
Candela
Setting
15 112 64 127 59
15/75 135 74 127 69
30 93 90
75 158 160
110 208 209
(mA RMS)
12V 24V 12V 24V
DC Operatng
Current–Strobe
(mA RMS)
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