Code 3 MicroCom 2 Siren - Manual (Page 5)

5
Amplifier Connections
Siren Amplifier Connector - As a standard feature, the Siren is equipped with a combination plug-
in terminal block/connector. To terminate the wires, strip approximately 1/4" of insulation from the
end of each wire and insert it in the appropriate hole in the terminal block. Tighten the setscrew and
proceed to the next connection.
Should you ever have to remove the unit, pull the terminal block straight out. It will unplug from the
unit, leaving the wiring in place.
Terminal Connections
COM - Connect to the wire from speaker terminal 1.
SPKR - Speaker - Connect to the wire from speaker terminal 2.
NOTE: When using two 100W (11 ohm) speakers in parallel, correct phasing is important and can
be accomplished by connecting both speaker terminals marked " 1 " to the COM terminal and both
speaker terminals marked " 2" to the SPKR terminal. Also refer to the wiring diagram on page 14.
REMOTE - Remote switch (Horn ring or foot switch). Circuit can be configured for both ground
(earth) or positive signals. A horn ring transfer circuit is standard in all 3990 series. Connect to the
"REMOTE" terminal on the Lighting Control Section terminal block. Unit is configured for a ground
(earth) at the factory. See page 8 for details on configuring for a +12V input.
WARNING!
!
Larger wires and tight connections will provide longer service life for components. For high
current wires it is highly recommended that terminal blocks or soldered connections be used with
shrink tubing to protect the connections. Do not use insulation displacement connectors(e.g. 3M
® )
Scotchlock type connectors). Route wiring using grommets and sealant when passing through
compartment walls. Minimize the number of splices to reduce voltage drop. High ambient
temperatures (e.g. underhood) will significantly reduce the current carrying capacity of wires, fuses,
and circuit breakers. Use "SXL" type wire in engine compartment. All wiring should conform to the
minimum wire size and otherrecommendations of the manufacturer and be protected from moving
parts and hot surfaces. Looms, grommets, cable ties, and similar installation hardware should be
used to anchor and protect all wiring.
Fuses or circuit breakers should be located as close to the power takeoff points as possible
and properly sized to protect the wiring and devices. Particular attention should be paid to the
location and method of making electrical connections and splices to protect these points from
corrosion and loss of conductivity. Ground (Earth) terminations should only be made to substantial
chassis components, preferably directly to the vehicle battery.
The user should install a circuit breaker sized to approximately 125% of the maximum Amp capacity
in the supply line to protect against short circuits. For example, a 30 Amp circuit breaker should
carry a maximum of 24 Amps.
DO NOT USE 1/4" DIAMETER GLASS FUSES AS THEY ARE NOT SUITABLE FOR
CONTINUOUS DUTY IN SIZES ABOVE 15 AMPS. Circuit breakers are very sensitive to high
temperatures and will "false trip" when mounted in hot environments or operated close to their
capacity.