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speaker output
Gray
Switch key:
S1 - Whistle (momentary)
S2 - Bell
All main sounds
S3 - Cylinder blow down
except exhaust
S4 - Main sounds off
chuff would be
produced by this
White
Black
connect White and Black wire together on
Connect only the
SYNC input as shown. This will prevent
switches or
functions desired.
the chuff from playing in this unit.
speaker output
Gray
Chuff sounds
produced by this
sound unit.
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.
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.
Using dual sound systems with an auxillary amplifier.
Black
White
+
Red
–
sound unit.
Gray
Black
White
+
Red
–
Gray
1k, 1/4w
(brn,blk,red)
ON / OFF
switch
#524 DPST switch.
Switch shown in the OFF position.
Drawn as a SPST.
1k, 1/4w
(brn,blk,red)
Black
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!
6
track power,
Connect motor
receiver
M
if present
motor leads.
DC battery power input.
+
Red
Input voltage of 12 to 24 volts DC.
Connect to the same power that is
Gray
–
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.
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.
Auxillary 11 or 22 watt Audio Amplifier
with Treble and Bass controls.
Item 671 - 11watt, 672 - 22 watt.
Red
1
2
Black
3
Gray
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.
use
8 ohm
speaker
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