Epson Express Station - Manual (Page 17)

Connecting a Serial Device
Connect one end of the serial cable to your serial device, as
described in its manual. Then connect the other end to one of
your computer’s serial ports and tighten the retaining screws.
Note
If you are installing two serial devices, you must choose one
device to be the primary serial device (COM1) and the other
to be the secondary device (COM2). Connect the primary
serial device to serial port 1 and the secondary device to
serial port 2. You can also change the serial port assignment
using the BIOS SETUP program or System Configuration
utility; see the Software Guide for more information.
Then connect the device’s power cord to the device (if
necessary) and to an electrical outlet.
8 Setup Guide