Physical Controls 51
E-EQ-MX3XRG-H MX3X Reference 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)
USB Client / USB Host
Audio Jack
DC Power Jack
MX3P Enclosure
Figure 2-4 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 / Serial Port endcap COM 3 is the Integrated Scanner port. The
integrated barcode scanner scans only when the Scan button is pressed. To edit Scanner Com 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 Endcap Port for Cables with
USB Plugs/Receptacles:
Caution – Do Not Use the USB
Labelled Endcap Ports for Serial
Tethered Scanners:
Figure 2-5 Serial Ports and Cables
