Epson TM-T82II Technical Reference Handbook page 42

Pass-through connection
This printer is connected to the host computer through the serial interface via the customer
display (DM-D).
Power supply unit
+ AC cable
Serial cable
Connecting the serial interface (RS-232) cable
Be sure to turn off the power supply for both the printer and host computer before
connecting the cables.
WARNING
1
Insert the serial cable connector firmly into the serial interface
connector.
2
When using connectors equipped with screws, tighten them to secure
the connectors firmly.
When using interface cables equipped with a grounding line, attach the ground line to the
screw hole marked "FG" on the printer.
3
Connect the other end of the serial cable to the host computer.
42
Extended
power cable
Serial cable
DM-D
TM-T82II
Modular cable
Cash drawer