User's Manual

Maintenance
Page 21 SA-80A Installation Manual
6.3.1. Main Board
The Main board includes the major components for the operation
of the siren: a microprocessor, a loudspeaker, driving circuitry, and
a power supply regulator. A number of jumpers are available to
select certain parameters (refer to the table below).
Table 3: Main Board Components
Ref.
Des.
Description Function Remarks
J1 Terminal board Input power
Pin 1: (+)
Pin 2: (-)
J2 Multi-pin header
Strobe
output
Pin 1: Strobe +
Pin 2: Strobe -
Pin 3: Power LED
Pin 4: Battery low
out
Pin 5: Ground
J4 Multi-pin header
Programmin
g
Factory use only
J5 2-pin header
Speaker
output
J6 2-pin header
Piezzo
output
R16 Potentiometer
Float
charge set
Factory adjust
only
JP1 Jumper Volume High or low