BN series control device unit, Number of devices: 4 devices, Position 1: 1 pushbutton white 1NO, Position 2: 1 pushbutton white 1NO, Position 3: 1 pushbutton red 1NC, Position 4: 2-position key selector switch 1NO , Protection degree: IP65 according to EN 60529, Connection and output direction: M12 connector, 12-pole, at bottom.