System Sensor SpectrAlert SP2 Series Installation And Maintenance Instructions page 2

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 con-
nection in order to maintain electrical supervision.
Figure 1. Electrical connections:
INPUT FROM
AMPLIFIER
INPUT FROM
POWER SUPPLY
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
lists the UL reverberant and anechoic output sound lev-
els for each power tap on the SP2 series speaker/strobes.
Table 2. Current draw of strobes:
AVERAGE CURRENT (mA)
20V
Candela
DC FWR DC FWR DC
15 50
15/75
56
30 78
75 145 170 123 159 102 141
110 169 220 140 191 115 174
D690-01-00
TO NEXT
SPEAKER OR EOL
TO NEXT
STROBE OR EOL
1 ⁄ , 1 ⁄ , 1 or 2 Watts. Table 1
4 2
24V Models
24V 30V
FWR
61 43 60 38 60
65 49 64 44 62
84 67 82 58 72
Figure 2. Voltage and Power Selection:
CORRECT
Table 1. Sound levels for each transformer
power tap:
UL
Reverberant
(dBA @ 10 ft.)
Anechoic
(dBA @ 10 ft.)
Signal levels exceeding 130% rated signal voltage can
damage the speaker. Consequently, an incorrect tap con-
nection may cause speaker damage. This means that if a
1 ⁄ Watt
4
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.
PEAK CURRENT (mA)
24V Models
20V 30V
24V
DC FWR DC FWR DC
135 204 135 208 135 185
150 199 150 207 150 198
183 201 183 219 183 216
350 440 340 460 330 480
460 560 450 570 420 620
2
INCORRECT
25.0V
70.7V
2W
1W
1/2W
1/4W
2 W 1 W 1/2 W
84 81 78
2 W 1 W 1/2 W
87 84 81
CAUTION
IN RUSH CURRENT (mA)
24V Models
20V 24V
FWR DC FWR DC FWR DC
97 129 116 152 147 198
97 135 116 164 147 211
97 129 116 152 147 198
190 240 230 280 290 380
190 230 220 290 290 370
25.0V
70.7V
2W
1W
1/2W
1/4W
1/4 W
75
1/4 W
78
30V
FWR
I56-1368-003R