PowerBox Systems SparkSwitch RS Instruction Manual page 4

• Spektrum SRXL2: connect the BUS input to SRXLS2 on the receiver
• Graupner, Multiplex, JR and other systems: connect the PWM input of the
SparkSwitch RS to a servo socket on the receiver. The BUS input of the
SparkSwitch RS should also be connected to the receiver's telemetry output.
Battery
Connect the ignition battery to this socket. The centre pin is Positive, both outer
pins are Negative. This arrangement eliminates the possibility of reversed polarity
even if you connect the plug the wrong way round (turned through 180°).
It is essential to use a separate battery for the ignition system. Do not take the cur-
rent from the receiver power supply, as this would negate the galvanic separation
of the two power circuits.
Ignition
Connect the ignition unit to this socket. The centre pin is Positive, both outer pins
are Negative. This arrangement eliminates the possibility of reversed polarity even
if you connect the plug the wrong way round (turned through 180°).
RPM
If your ignition unit features a Tacho output, then it can be connected directly to
this socket. For other ignition systems a separate sensor is available which derives
the rotational speed from the Hall sensor. The RPM output also provides power to
external sensors, which means that other types of rotational speed sensor - such
as optical systems - can also be connected.
LED
The external LED is connected directly to the power output for the ignition unit, and
is therefore a reliable indicator of the switched status.
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