8
Day and night volumes
Below are two different wiring possibilities for wiring a switch to control the siren output for day and
night volume levels.
Day and night switching using relay
Day and night switching using SPDT Switch
SPDT switch PH PN: 502
Note: SPDT switch can be used for both operations, when using SPDT switch it must be rated correctly
for the current passing through it (6A).
Horn ring transfer (HRT) / Footswitch
The Siren amplifier detects if the horn ring transfer is positive or negative switched at start up. If the
HRT input senses a positive feed it must be a negative switched horn, if it doesn’t sense a positive feed
it must be a positive switched horn. The HRT input just needs to be connected to the switched side of
the vehicle horn for the detection to work.
If using a footswitch use a momentary push to make switch, feeding positive to one side of the switch
and connecting the HRT input wire of the siren amplifier to the other.
Data output
– This provides a 200mA positive output feed that can be connected to a data logger, the
data output is switched on when the siren is sounding and operating correctly.
D00217-00-A
REL: 39983
