System Sensor SPECTR Alert Advance Series Installation And Maintenance Instructions page 2

Wiring
Figure 1. Non-Synchronized devices; any combination of
Horn Horn/strobe
models powered by a 2-wire circuit
(+)
(+)
Horn Horn/strobe
(+)
(+)
(–)
(–)
(–)
(–)
Figure 2. Synchronized devices; any combination of models
powered by a 2-wire circuit
Horn Horn/strobe
(+)
(+)
Horn Horn/strobe
(+)
(+)
(–)
(–)
Synchronization Module
(–)
(–)
NOTE: For further information on synchronization see MDLA,
Synchronization Module
panel, or power supply installation manual.
NOTE: For 24 volt applications, the total number of horns on a
single NAC must not exceed 85 with a maximum loop resistance
of 120 ohms. For 12 volt applications, the total number of horns
must not exceed 85 with a maximum loop resistance of 120 ohms.
Sounder Selection
Sounder setting selection is accomplished by using the rotary
switch on the back. (See Figure 3.) The sound measurements for
the various settings are shown in Table 1A. The current draw for
the various settings are shown in Table 1B. Directional character-
istics are shown in Table 1C.
Table 1A.
MHRA/MHWA SOUNDER OUTPUT (dBA) IN ANECHOIC
ROOM
Switch Sound Volume
Position Pattern
1 Temporal High
2 Temporal Low
3 Non- High
Temporal
4 Non- Low
Temporal
Strobe Only
(+) (+)
Two Wire System
Strobe Only
E
Any Mix of Models
(+) (+) O
Wired for Tandem
L
Operation
Two Wire System
E
Any Mix of Models
(–)
(–)
O
Wired for Tandem
L
Operation
(–)
(–)
Strobe Only
(+)
(+)
Two Wire System
Strobe Only
E
Any Mix of Models
(+) (+) O
Wired for Tandem
L
Operation
Two Wire System
E
Any Mix of Models
(–)
(–)
O
Wired for Tandem
L
Operation
(–)
(–)
Power Voltage
Supply
12
DC 87.1
FWR 90.8
DC 86
FWR 90
DC 87
FWR 89
DC 86
FWR 88
MHRZA/MHWZA SOUNDER OUTPUT (dBA) IN ANECHOIC
ROOM
Switch Sound
Position Pattern
1 Temporal
2 Temporal
3 Non-Tem-
4 Non-Tem-
Table 1B.
MHRA/MHWA CURRENT DRAW (mA RMS)
A0111-01
Switch Sound
Position Pattern
1 Temporal
2 Temporal
3 Non-
Temporal
4 Non-
Temporal
MHRZA/MHWZA CURRENT DRAW (mA RMS)
Switch Sound
Position Pattern
1 Temporal
24
2 Temporal
91.8
91.7
3 Non-
90
Temporal
90
4 Non-
91
Temporal
91
90
Table 1C.
90
DIRECTIONAL CHARACTERISTICS (90° REFERENCE)
Model
MHRA/MHWA
MHRZA/MH-
WZA
2
Volume Power
Supply
High DC
FWR
Low DC
FWR
High DC
poral
FWR
Low DC
poral
FWR
Volume Power
Supply
High DC
FWR
Low DC
FWR
High DC
FWR
Low DC
FWR
Volume Power
Supply
High DC
FWR
Low DC
FWR
High DC
FWR
Low DC
FWR
Axis -3dBA Angle
Horizontal 40°, 140°
Vertical 37°, 140°
Horizontal 35°, 142°
Vertical 40°, 140°
Voltage
24
91.8
92
89
89
90
89
87
86
Voltage
12 24
12.6 22.1
15.0 23.0
10.3 16.6
12.1 18.8
13.6 23.0
14.6 21.8
10.2 16.6
12.1 18.8
Voltage
24
24.1
24.3
18.2
20.8
24.4
23.8
18.2
20.5
-6dBA Angle
37°, 145°
34°, 142°
32°, 145°
37°, 150°
I56-3027-002
5/21/2019