This Class A & B connection chart is for Lumberg Automation M12 connectors used with I/O Hub M12 distribution blocks

IO-Link By Class
Description	Class A Part Number	Class B Part Number
Male straight/Female straight	RST 3-RKT 4-3-659/* M	RST 5-RKT 5-647/* M
Male straight/Female right angle	RST 3-RKWT 4-3-659/* M	RST 5-RKWT 5-647/* M
Male straight	RST 3-659/*M	RST 5-647/* M
Male right angle	RSWT 3-659/*M	RSWT 5-647/*M
Female straight	RKT 4-3-659/*M	RKT 5-647/* M
Female right angle	RKWT 4-3-659/*M	RKWT 5-647/* M
Male straight - Screw type - 3-6.5 mm	RSC 3/7	RSC 5/7
Male straight - Screw type - 4-8 mm	RSC 3/9	RSC 5/9
Male straight - Spring type - 3-6.5 mm	RSCQ 3/7
Male straight - Spring type - 4-8 mm	RSCQ 3/9
Male right angle - Screw type - 3-6.5 mm	RSCW 3/7	RSCW 5/7
Male right angle - Screw type - 4-8 mm	RSCW 3/9	RSCW 5/9
Female straight - Screw type - 3-6.5 mm	RKC 4/3/7	RKC 5/7
Female straight - Screw type - 4-8 mm	RKC 4/3/9	RKC 5/9
Female right angle - Screw type - 3-6.5 mm	RKCW 4/3/7	RKCW 5/7
Female right angle - Screw type - 4-8 mm	RKCW 4/3/9	RKCW 5/9