ASCOM CEM26, GEM28 User Manual

Connect a CEM26/GEM28 mount to a Computer

A CEM26/GEM28 mount can be connected to a computer via USB port, or a built-in Wi-Fi. A USB2.0 cable is needed to
make the connection work if connected to a computer USB port.

Connect to a Windows computer is via ASCOM Platform (please refer to http://www.ascom-standards.org for detailed
info.) The software/firmware needed:

 Windows 7 /8.1 /10 with .NET (dotNET) Framework 4.8 installed;
 Latest ASCOM Platform. Download and install it from http://www.ascom-standards.org;

 iOptron Commander and ASCOM Driver Installer 6.3 or later. Download and install it from iOptron CEM26 or

GEM28 product page. CEM26/GEM28 uses Commander V6.X.

After installation, you should see an icon like this on your computer desktop, or your designated folder:

 Latest mount firmware

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Connect a mount to a computer via USB

Plug USB B plug of a USB cable into the USB port on a 8409 hand controller as shown below. Plug the USB A plug into any
available USB port of the computer.

Click on Windows Device Manager to find the assigned COM port for the USB connection. Here the port # is COM4.

Click on iOptron Commander for CEM120/CEM70 . An iOptron Commander Connection Setting window will
open:

Select “RS-232/USB Port” with “Auto Detection”, or click on the RS-232/USB Port pull down menu to select a COM port
manually. Here it is COM4 as shown below.

Click OK to connect.

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