User's Manual

The sensor side of the tach circuit board must be mounted closest to magnets. The sensor is on the
opposite side from the large chip that protrudes from the shrink tubing. The graphic above shows where
the sensor is so you can mount it correctly.
When moving, the magnets should pass directly over the center of the sensor.
We have used a variety of methods of mounting tach sensors, depending on the car and the chosen
location. Some ideas include cable ties, epoxy/hot glue, wire, making a wooden housing that holds the
sensor in a specific place, etc. The only “wrong” way to mount it is if the magnets hit the sensor or are
too far away, or if the sensor moves while the car is running.
Connection
Connecting the Tach Sensor
After you install the tach sensor in the vehicle, plug it into the “DIGITAL” receptacle.
Plug connector into transceiver – tachometer connector pin 1 (designated with a red wire and an arrow
on the connector body housing) corresponds with the keyed end of transceiver digital port connector
(labelled “digital”). The transceiver will automatically detect which sensors are installed.
Test your sensor’s installation
Power on React and transceiver and bind them
Verify communication between tachometer and transceiver by selecting RPM reading from drive
screen
Correct mechanical installation can be verified by noting RPM value changes on your controller screen
while you spin the wheels of your model.
Connect
optional Tach
h