Epson DM-D500 Technical Reference Manual page 16

Y connection (Serial)
The Y connection is a connection in which the computer is connected to the customer display via the TM
printer. This is possible when the TM printer is equipped with a DM-D connector, and connected using serial
connection. The power supply is connected to the TM printer.
With DP-501
Computer
With DP-502
Computer
Data flow in Y
connection
16
Serial
Serial
Serial
Computer
TM Printer
PS-180
TM Printer DM-D500 + DP-502
PS-180
TM Printer
Serial
DM-D500 Modular Cable
DM-D500 + DP-501
DM-D500