D900-05-00
1
I56-496-16
MA12/24D* Electronic Sounder,
SS12LO, SS24LO*, SS24M*
Electronic Strobe, MASS12LO,
MASS12M, MASS24LO*, MASS24M*
Sounder/Strobe Combined
*ULC models add suffix “A”; strobes and sounder/strobes available in 24VDC only
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
General Description
The National Fire Protection Association has published standards
and recommended practices for the installation and use of the
listed appliances. It is recommended that the installer be familiar
with these requirements, with local codes, and any special re-
quirements of the authority having jurisdiction.
The electronic Multi-Alert sounder and the signaling strobe are in-
tended to be connected to the alarm indicating circuit of a listed
fire alarm control panel. Both are compatible with DC line super-
vision. The model MA12/24D is suitable for connection to either a
12 or 24 volt panel. Models SS24LO, SS24M, MASS24LO and
MASS24M require 24 volt panels; models SS12LO, MASS12LO and
MASS12M require 12 volt panels. Horn, strobe, or combination
strobe models may be used with panels that have full wave recti-
Sound (Hz)
Clips on Tabs
Current (mA)
( Note 1)
Output (dBA)
UL (dBA) Ratings
( Note 4)
DC Regulated/
(Note 2)
(Note 3)
FWR Unfiltered
12V
24V
30V
12V
24V
12V
24V
Slow Whoop
ABC
21/40
38/56
46/72
85
92
79
85
800 Continuous
BC
15/24
28/45
35/55
87
93
79
85
800/1000 Alternating
AC
17/32
34/46
43/58
85
92
79
85
2400 Interrupted
AB
19/23
35/56
43/64
89
90
79
85
2400 Continuous
C
21/31
38/59
46/73
85
94
79
85
1200 Interrupted
B
13/19
23/33
27/41
85
91
75
82
Swept Frequency
A
17/24
34/47
43/60
85
92
79
85
Fast Warble
NONE
15/27
30/47
38/59
85
92
79
85
Note 1:
Total current for horn/strobe combinations = horn c
strobe current; refer to tables 1 and 2.
Note 2:
Sound output measured in anechoic room at 10 feet.
Note 3:
Sound output measured in UL reverberant room.
Note 4:
See Figure 4 for tab clip removal & storage.
Note 5:
All horn or combination strobe models can be powered using
full wave rectified unfiltered supplies.
Under no circumstances can
the SS24 or MASS24 input volt-
age exceed 33 VDC or be less
than 18 VDC. Under no cir-
cumstances can the SS12 or
MASS12 input voltage exceed
18.7 VDC or be less than 9.6
VDC. Under no circumstances
can the MA12/24D input volt-
age exceed 33 VDC or be less
than 9.6 VDC.
Table 2. Sound output and current ratings for the MA12/24D:
Model
Supply
Operating
Operating Current
Peak
Minimum Output
Voltage
Current from
from Rectified
Current
@ 100% Viewing
Regulated Supply
Unfiltered Supply
Angle (see Fig. 3)
(VDC)
(mA)
(mA, RMS)
(mA)
(Candela)
SS12LO
12-17
50
80
550
1.5
SS24LOA
22.5-30
(.22@-35
o
C)
SS24MA
22.5-30
(5.9 @-35
o
C)
SS24LO
22.5-30
25
45
225
1.5
(.22@-35
o
C)
SS24M
22.5-30
75
125
450
15
(5.9 @-35
o
C)
Table 1. SS12/24 electrical and light ratings:
fied, unfiltered supplies. The MA12/24D sounder and MASS12/24
sounder/strobes are suitable for outdoor applications (–35
°
C to
66
°
C) when used with a Weatherproof Back Box (Model WBB) as
tested by UL. In Canada, rigid steel conduit must be used when
installing the Weatherproof Back Box. The light output of the
SS12LO, SS24LO, MASS12LO and MASS24LO is 1.5 cd min
@100% viewing angle. The light output of the SS24M, MASS12M,
and MASS24M is 15 cd min @100% viewing angle (See Figure 3).
There are eight different sounds which can be selected on the
electronic sounder by adding or removing tab clips (see Figure 4).
The sound selected will determine the maximum current and
sound power output per device. See Table 2 for these values.
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