De NEM 652 of 8 Pin DCC Plug is de meest standaard gebruikte locomotief interface. The plug is on the end of a loose wiring harness coming from the decoder and mates with a fixed 8 hole socket mounted on the locomotive chassis. The 8 pin version is known as the medium size and is the most common standard DCC connector used in HO and OO locomotives.DCC-ready locomotives with 8-pin sockets are shipped with a factory-installed 8 pin blanking plug that shorts the rail pickups to the motor terminals (and headlights) in the absence of a decoder. This plug must be removed before installing the decoder and must be replaced if removing the decoder and returning it to analog operation.
