Code 3 MasterCom B Series - Manual (Page 9)

9
Remote Input
The remote input can be configured to accept either a positive +12V or negative GND ( Earth ) signal
for actuation. All new style 3890 series sirens are shipped set-up to accept the GND (Earth) signal
from the vehicle HORN SW present on most vehicles. To reconfigure this as a +12V signal the rear
plate must be removed ( see assembly explosion page 19 ). Place both jumpers towards the "+ "
position. Refer to Detail "A" shown above for a complete illustration.
4-Position DIP Switch
Gently set the SirenLock, PKILL and LightAlert set-up switches to the desired position with a pencil
point or some other pointed object. These switches are present even if LightAlert were not specified.
If switched on, all of the tones except AIR HORN, mute until the Warning Light Switch is in either the
Level 3 or the Level 2 or 3 positions.
SirenLock - In position "3" the siren tones are allowed to sound and the horn ring relay transfers
when the Warning Light switch is placed in the Level "3" position. In position "2,3" the siren tones
are allowed to sound and the horn ring relay transfers when the Warning Light switch is placed in
either Level 2 or in Level 3 position.
LightAlert - When in the ON position, enables the LightAlert tone, which alerts the operator
audibly when any lighting switch is activated. When in the OFF position, defeats the LightAlert
tone.
PKILL- When vehicle is shifted to PARK lighting level 3 will " drop-out " if this switch is in the "on
"position. This is intended to reduce power consumption while vehicle is not moving. If it is not
desired to have level 3 "drop-out" this switch should be set to the " OFF " position on the dip
switch. This will not defeat the PKILL feature on the siren, but will defeat the level 3 DROP
out.