Attributes . 1 male connector M12 A coding, 4 ways downstream link I5 || 1 female connector M12 A coding, 4 ways output control relay I4 || 1 female connector M12 A coding, 4 ways sensor input I3 || 1 female connector M12 A coding, 4 ways transmittor supply I2 || 1 female connector M12 A coding, 4 ways upstream link I1 . Names