Chapter 1 Product Overview DP-503 DP-503 is a pole unit to attach DM-D500 to a TM printer. Regarding TM printers to which DP-503 can be attached to, see "Connecting a TM Printer and Option" on page 18 . Package contents Items supplied with DP-503 are as follows. Tapping screws for fixing (M3 Ч 10) (3 pcs) 1 Installation base unit for TM Support B Support C Dimensions DP-503 260 mm 53 mm 25 50 mm