System Configuration Connection Patterns There are several connection patterns to choose from depending on the customer's system and type of TM printer to be used simultaneously. Stand-alone connection (Serial) The stand-alone connection uses one serial port of the computer for the customer display. It requires the DP- 501 dedicated stand. Data flow in stand-alone connection 14 Computer DM-D500 + DP-501 Serial PS-180 Computer Serial DM-D500