Eagle Tree eLogger V2 Multi-Expander User Manual

Eagle Tree Audio accessories

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Copyright © 2007 Eagle Tree Systems, LLC


Instruction Manual for the MicroPower eLogger Multi-Expander

Document Version 1.4

Thank you for your purchase! This instruction manual will guide you through the installation and operation of your Multi-Expander Sensor (the Expander).
Please read the entire manual carefully before proceeding. If, after you read the manual, you have further questions or problems, see the Support page on


for additional information, or email us at [email protected].

IMPORTANT: It is unlikely that the installation of the Expander will affect your model’s radio range or control. But, as always after making an
electronics change to your model, it is very important that you range and function test your model once the Expander is installed to ensure that there is no
impact on your system. Make sure that your “antenna down” operating range is within the manufacturer’s specifications. See your Radio owner’s manual
for the correct procedure for your equipment. DO NOT OPERATE IF YOUR MODEL DOESN’T PASS THE ANTENNA DOWN RANGE CHECK.

Packing List

Your package should include the following: The Multi-Expander Sensor, one universal Y-Cable, and a printed version of this manual. Please check our
support web page for the electronic version of this manual which may be updated if changes were made after printing.

What the Expander Does

The Expander connects to your MicroPower eLogger to provide 3 features:

Measurement of RPM via pulses from either one or two of the wires leading from your Electronic Speed Controller (ESC) to your motor. In most
cases, only one wire needs to be connected. The Expander works with all known brushless motors.

Measurement of Throttle (or other) Servo position.

Measurement of two temperatures simultaneously, in addition to RPM (normally only one temperature can be measured when RPM is being

Supported Products

The Expander works with all versions of the MicroPower eLogger product.

Steps to Follow

Installation and use of your Expander should be quite easy and enjoyable if you follow these few steps:

1. Read through the manual to understand the warnings, determine the installation and setup sequence, etc.
2. Upgrade the Windows Application and Firmware for your MicroPower as described in the “Windows Application and Firmware Update” section below.
3. Complete the installation as described below.

Windows Application and Firmware Update

To use the Expander, you must update to Eagle Tree Windows Application version 5.50 or higher. To update, download the latest application from the
support page of our website. After downloading and installing the Application, the firmware of your MicroPower eLogger will need to be updated.
Firmware version 4.91 or greater is required for the Expander to work correctly. To upgrade your firmware, choose “Tools, Firmware Control” and click
the Update button.

Connecting the Expander to the MicroPower

The Expander plugs into the both the RPM and Temperature ports of the MicroPower, as shown in Figure 1.

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