PRINTED CIRCUIT BOARD WITH LEDS AND ITS USE IN AN EXPLOSION PROOF LIGHTING FIXTURE

摘要

The invention relates to a method of using a printed circuit board, wherein the board comprises a multiple number of contact pad pairs for contacting corresponding contact terminal pairs of LED's, a multiple number of electrically conducting tracks interconnecting the contact pad pairs in series forming, with the contact pad pairs, a chain structure having a first end and a second end. Here, a first power connection portion connected to the first end of the chain structure, while a second power connection portion connected to the second of the chain structure. Further, a bypass circuit arranged in parallel with a contact pad pair or a multiple number of contact pairs connected in series, the bypass circuit including a bypass contact pad pair for contacting a corresponding contact terminal pair of a voltage limiter element. The method comprises the step of using the board in an explosion proof lighting fixture.