User Guide

6
Using dual sound systems with an auxillary amplifier.
+
–
speaker output
ON / OFF
switch
+
–
Red
Gray
Switch key:
S1 - Whistle (momentary)
S2 - Bell
S3 - Cylinder blow down
S4 - Main sounds off
Gray
Gray
speaker output
1k, 1/4w
(brn,blk,red)
1k, 1/4w
(brn,blk,red)
DC battery power input.
Input voltage of 12 to 24 volts DC.
Connect to the same power that is
powering the sound system.
If this is a DCC system, one of the sound
units needs to have J1 connected to the
track power and no battery power or an
on/off switch would be connected. Switch
inputs s1 - s4 would be functions.
Red
Gray
Black
Connect motor
if present
M
+
–
Red
Gray
Connect only the
switches or
functions desired.
This unit, #711, will produce the exhaust chuff sounds. Input J4 would be
hard wired to J2 gray as page 2 explains. Inputs for J5 would be
connected to functions if desired in parallel with J5 of main unit above.
Chuff sounds
produced by this
sound unit.
White
Black
White
Black
track power,
receiver
motor leads.
All main sounds
except exhaust
chuff would be
produced by this
sound unit.
White
Black
connect White and Black wire together on
SYNC input as shown. This will prevent
the chuff from playing in this unit.
If no auxiliary amplifier is present, merely connect everything else as shown
except it will be necessary to utilize two speakers. One speaker for the
main sound board, the other for the chuff board.
Dual Systems without an amplifier are connected in similar fashion
except for the amplifier and joining of speaker wires through 1k
resistors. Instead each sound system must have it's own speaker.
Audio input. Connect as shown to
resistors and gray speaker wire from
sound system. Do not use the red
speaker wire from the sound system.
This wire does not get connected!
1
2
3
Black
Red
More than one power amplifier can be used. To do so
connect the input wires (gray) in parrallel from the
amplifier to the sound systems gray speaker wire or
use one amplifier for each sound system.
Gray
use
8 ohm
speaker
Auxillary 11 or 22 watt Audio Amplifier
with Treble and Bass controls.
Item 671 - 11watt, 672 - 22 watt.
#524 DPST switch.
Switch shown in the OFF position.
Drawn as a SPST.