The invention provides an IMS printed circuit board (1) comprising a card edge connector (3) with a first face (31) and a second face (32), the second face (32) being in electric contact with the metallic core and the card edge connector (3) comprising a plurality of signal traces (4). At least one of the signal traces (4) is a ground trace (41) which is in electrical connection with a ground connection of the printed circuit board (1) and is intended to be connected to a ground pin (61) comprised in a card edge connector socket (2). The invention also provides a card edge connector socket (2)with a plurality of pins (6), one of the pins being a ground pin (61) and being configured to receive the ground trace (41) of the printed circuit board (1). An electronic assembly comprising the printed circuit board (1) and the card edge connector socket (2) and a lighting device are also provided.