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 TM Printer Serial DM-D500 + DP-501 PS-180 With DP-502 Computer TM Printer DM-D500 + DP-502 Serial PS-180 Data flow in Y connection Serial DM-D500 Modular Cable DM-D500 16 Computer Serial TM Printer