Epson DM-D500 Technical Reference Manual page 15

Pass-through connection (Serial)
The pass-through connection is a connection in which the computer is connected to the TM printer and cash
drawer via the customer display. This is possible only when all equipment is connected in serial, and requires
the DP-501 dedicated stand.
Computer
Data flow in pass-through
connection
DM-D500 + DP-501
Serial
Serial
Computer
PS-180
Power extension cable
Serial
DM-D500
TM Printer
DP-501
Chapter 1 Product Overview
TM Printer
15
1