User Guide

10
Using dual sound systems with an auxillary amplifier.
+
–
speaker output
S1
S2
S3
S4
Switch key:
S1 - Horn (momentary)
S2 - Bell
S3 - Force Notch 8
S4 - Main sounds off
#524 SPDT switch.
Switch shown in the OFF position. Drawn as a spst.
ON / OFF
switch
+
–
Red
Gray
S1
S2
S3
S4
Switch key:
S1 - Horn (momentary)
S2 - Bell
S3 - Force Notch 8
S4 - Main sounds off
#524 SPDT switch.
Switch shown in the OFF
position. Drawn as a spst.
#618 SPST momentary
push button switch.
Switch shown in the OFF position.
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
Connect motor
if present
M
track power, receiver
motor leads, or whatever
you are using to adjust
the prime mover notches.
#524 SPDT switch.
Switch shown in the OFF position.
Drawn as a spst.
+
–
Red
Gray
Connect only the switches desired for each sound
system. It is best to use one with the prime mover
turned off (S4), using it to produce the Horn and Bell.
The other unit would then produce the prime mover
with only S3, to force N8, utilized. As shown.
Gray
Red
Gray
Red
Gray
This unit would produce the prime mover sounds.
Utilizing S3, force N8, and S4, main sounds off,
as optional connections. The horn and bell
would not be used in this unit since the upper
unit would be producing those sounds.
Horn and Bell
sounds would be
produced by this
sound unit.
Prime mover
sounds would be
produced by this
sound unit.
Black
White
Black
White
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
Auxillary 11 or 22 watt Audio Amplifier
with Treble and Bass controls.
Item 671 - 11watt, 672 - 22 watt.
use
8 ohm
speaker