System Sensor PS24LO Installation And Maintenance Instructions Manual Download Page 1

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I56-305-07

PA400*, PS12LO(W), PS12M(W),

PS24LO(W)*, and PS24M(W)*

Electronic Mini-Sounders and

Optional Strobes

*ULC models add suffix “A”; 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 Information

The National Fire Protection Association has published codes,
standards, and recommended practices for the installation and
use of the above appliances. Therefore, the installer must be fa-
miliar with these requirements, with local codes, and any special
requirements of the authority having jurisdiction.

Model PA400

The PA400W (white) and PA400R (red) Piezo Alert electronic
sounder and optional supplementary signal strobes are intended
to be connected to the alarm indicating circuit of a UL-listed 12 or
24 VDC fire alarm control panel. The models PS12 and PS24 op-
tional strobe additions to the PA400 require a 12 VDC or 24 VDC

Specifications

PA400 Sounder

Operating Voltage:

9.6VDC (absolute min.) to 33VDC (absolute max.)

Current Drain:

12  mA at 12 volts
15 mA at 24 volts

Temperature Range:

-10

o

C to +60

o

C (14

o

F to 140

o

F)

0

°

C to 49

°

C  (32

°

F to 120

°

F) with strobe added

Sound Output:

Greater than 90 dBA measured in anechoic room at 10 feet, 24 volts.
See Figure 1 for other voltages. 82 dBA minimum measured in  UL  reverbarant  room

(75 dBA minimum with strobe)

PS12/24 Strobe

MODEL

PS12LO(W)

PS12M

PS24LO(W)

PS24M(W)

PS24LOA(W)

PS24MA(W)

Panel Voltage

12–17 VDC 

12–17 VDC

22.5 - 30 VDC

22.5 - 30 VDC

22.5 - 30 VDC

22.5 - 30 VDC

Max. Current Drain @
Listed Panel Voltage

50 mA

180 mA

25 mA

75 mA

50 mA

180 mA

Min. Light Output @
100% Viewing Angle
(See Fig 2)

1.5 candela

15 candela

1.5 candela

15 candela

1.5 candela

15 candela

 

86

87

88

89

90

91

92

10

12

14

16

18

20

22

Voltage

dBA output

 

F

I

R
E

60%

60%

100%

100% 100%

(REF)

7%

60%

60%

7%

Temperature Range:

0

°

C to 49

°

C  (32

°

F to 120

°

F)

Figure 3. 12 volt strobe in-rush current:

1A/div

200

µ

S/div

1A/div

200

µS/div

 Figure 4. 24 volt strobe  in-rush current:

Figure 1:

Figure 2:

Under no circumstances can the PS24 voltage exceed 33VDC or be less than 18VDC.
Under no circumstances can the PS12 voltage exceed 18.7VDC or be less than 9.6VDC.
To calculate battery requirements, use current values shown above. However, note that there is an in-rush current associated with
strobe power-up. The information in Figures 3 and 4 is useful when selecting fuse values.
As Figure 3 shows, 12V strobe in-rush current typically peaks at 3A and drops to nominal in 600

µ

S. In a 24V strobe (Figure 4), in-rush

current typically peaks at 7.0A and drops to nominal in 800

µ

S.

panel, respectively and are able to operate from a full-wave recti-
fied, unfiltered supply.

Installation Notes

The wiring must be in compliance with all codes and must not be
of such length or wire size that would cause the appliance to op-
erate outside of its published specifications. The appliances must
also be tested after installation in accordance with the control
panel manufacturer’s test procedure.

NOTE

:

Do not loop wires under terminal screws. Wires
connecting the device to the panel must be broken at the
device screw terminal in order to maintain electrical

supervision.

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