Eagle Tree Vector - Manual (Page 70)

USER GUIDE
70
the housing, as shown below.
7.2.2 Brushless RPM Sensor
7.2.2.1 Brushless RPM Sensor Setup
Assuming the Aux1/M5/RPM Vector port is not being used to control a servo or motor output, you can connect
a MODIFIED Eagle Tree “Brushless RPM Sensor” (P/N RPM-BRS-V2) to that port, and display and log RPM.
DO
NOT connect an Optical or Hall (Magnetic) RPM sensor to the Vector! It could be damaged if you do.
The simple modification of the sensor involves carefully removing the sensor’s red and black wires from the
servo housing, using a probe or needle to gently lift the tabs on the housing, and reversing the red and black
wires, as shown below.
Additionally, the following should be noted about using an RPM sensor with the Vector:
1) Never power your receiver with greater than 6V when using an RPM sensor. Doing so could damage
the RPM sensor.
2) Dropouts of RPM readings can occur with high RPMs. If you see the RPM sensor reading 0 at higher
RPM, an additional modification to the RPM sensor is required:
a. Obtain an MA2C029TAF diode at digikey.com, or
another distributor.
b. Install it in the black wire of the brushless RPM
sensor, as shown.
7.2.2.2 Brushless RPM Sensor Hookup and Configuration
For correct RPM sensor readings, you need to let the Vector know the number of “poles” your brushless motor
has. This setting is entered in the “Num Brushless Motor Poles” section of the Calibration and Sensor Setup
menu.
Please refer to the Brushless RPM Sensor manual found on the “manuals” tab of our website for information on
how to connect the brushless RPM sensor to your motor, and how to determine the number of poles your
motor has.
Temp Sensor BEFORE Modification Temp Sensor AFTER Modification
RPM Sensor BEFORE Modification RPM Sensor AFTER Modification