There is provided a conveyor roller (1) for a conveyor system, comprising two bearing bodies (2, 3) for fastening the conveyor roller (1) are prepared in or on a frame (17, 18) of a conveyor system, one which is arranged therebetween and against the includes bearing bodies (2, 3) rotatably mounted roller body (4), an electric drive unit (5) for driving the roller body (4) and a to the drive unit (5) connected to the electrical control unit (6). Further includes the feed roller (1) electrically connected to the control unit (6) connected to the roller-side plug-in device (7), which for electrically connecting disposed with a frame (17, 18) of a conveyor system-side plug-in device (21) is prepared and relative to the bearing body ( 2, 3) is rigidly positioned substantially. The plug-in device (7) is formed by a printed circuit board (8) with plug contacts arranged thereon, and the control unit (6) is at least partially arranged on the same printed circuit board (8). Furthermore, there is provided a connection box (20) for the conveying roller, a conveyor system comprising the conveyor roller (1) and / or the connection box (20) and a method for the preparation of the conveyor.
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