Electrical Specifications
Operating Voltage
24 VDC and FWR
1
unfiltered
Input Terminals
12 to 18 AWG
Operating Voltage Range
16–33 V
Operating Voltage Range w/Sync•Circuit
Module
2
17-33 V
U.S. Patent Numbers
6,049,446
6,057,778
D424,465
Notes:
1. Full Wave Rectified (FWR) voltage is a non-regulated, time-var ying power source that is used on some power supply and panel outputs.
2. The MDL causes a one-volt voltage drop in the notification appliance circuit.
Table 1-A: SpectrAlert Strobe UL Max. Current Draw (mA RMS)
Strobe
Setting
15
15/75
30
75
95
115
177
16-33V FWR Operating
Current – Strobe
(mA RMS)
68
77
107
197
239
298
399
16-33V DC Operating
Current – Strobe
(mA RMS)
64
78
113
205
274
325
489
Table 1-B: Horn UL Max. Current Draw Measurements (mA RMS)
16-33V (DC)
Temporal
Low
Volume
High
Volume
Non-
Temporal
Low
Volume
High
Volume
Electromechanical
3000 Hz Interrupted
Electromechanical
3000 Hz Interrupted
Electromechanical
3000 Hz Interrupted
Electromechanical
3000 Hz Interrupted
23
33
53
57
37
32
49
56
16-33V (FWR)
23
23
44
40
29
33
49
58
Table 1-C: 24V DC Horn/Strobe UL Max. Current Draw Measurements (mA RMS)
Temporal
Low Volume
Candela Setting
15
15/75
30
75
95
115
177
Electromechanical
73
89
126
225
272
297
512
3000 Hz
73
89
125
222
270
297
504
High Volume
Electromechanical
76
91
128
222
271
296
501
3000 Hz
78
92
128
222
271
296
496
Low Volume
Electromechanical
75
89
125
219
266
291
491
3000 Hz
75
90
125
219
265
290
493
Non-Temporal
High Volume
Electromechanical
81
96
131
221
269
292
491
3000 Hz
86
98
134
222
270
293
496
Explanation of Published Voltage, Current, and SPL Specifications
In May 2004 Underwriters Laboratories changed standard
UL 1971 to require that operating current measuremments
are made using RMS (root mean square) instead of peak
or average values. RMS measurements more accurately
predict the power consumption of a device since they take
into account the entire current draw profile including surge,
repetitive surge, and peak values. The published RMS cur-
rent is the maximum operating current of that device within
its operating voltage range. This current maximum may or
may not occur at the endpoints of the voltage range.
During May 2004, UL also changed the way they list the
voltage range of a device. All 12V products will be listed
between 8 – 17.5V and all 24V products will be listed
between 16 – 33V. Those devices are considered “regulat-
ed”. Any product that does not operate within these ranges
will be listed as a “special application” with its operating
voltage specified on the device.
Notes
1. urrent draw for strobe-only products is shown in Table 1-A.
C
2
Similarly, UL tests the audibility of devices in accordance
2. 4VDC 2-wire horn/strobe current draw is shown in Table
1-C.
with UL 464 by measuring them across the operating volt-
C
age range to determine the minimum sound pressure level
3. urrent draw for other horn/strobe power supplies can be
calculated by adding the strobe current in Table 1-A to the
produced at any particular setting.
horn current in Table 1-B from the chosen settings.
SYSTEMSENSOR [ SYSTEMSENSOR ADVANCED IDEAS. ]
