Endcaps and COM Ports 37
E-EQ-MX3XOGWW-N MX3X User’s Guide
Endcaps and COM Ports
The computer supports three COM port options. Two external serial ports are dependent on the
end cap chosen. A third serial port is used to support an infrared transciever (barcode reader). An
additional endcap configuration supports serial and USB slave input/output at 1.5 MBps.
Standard Range Scanner Port
RS-232 Port (Serial Port) or
USB Client or USB Host
Audio Jack
or
Remote Antenna Connector
DC Power Jack
Figure 24 Endcap and COM Ports
The COM 2 port is always the IR port on the back of the mobile device, regardless of the type of
endcap installed. COM 2 can only be accessed when a tethered scanner is connected to the RS-232
port on the cradle, and the MX3X is in the cradle. The cradle does not need to be powered by an
alternate AC or DC power source. Tethered scanners receive power from the mobile device's main
battery.
On the Standard Range Scanner / RS-232 labelled port endcap COM 3 is the Integrated Scanner
port. The integrated barcode scanner scans only when the Scan button is pressed. To edit Scanner
port parameters, select Start | Settings | Control Panel | Scanner. Change the parameter values
and tap OK to save the changes.
On the Dual Serial Port endcap the COM1 port is the serial port on the right side of the endcap
when the display is facing you.
Caution -- Do Not Use the RS-232
Labelled Port for Cables with USB
Plugs/Receptacles:
Caution -- Do Not Use these USB
Labelled Endcap Ports for Tethered
Scanners:
Figure 25 Labelled Ports and Cables
Seat the connector firmly over the pins and turn the thumbscrews in a clockwise direction. Do not
overtighten.
Note: When the MX3X has a remote antenna connector, it does not have an audio jack.
