... 0-8000mm;SpecificationSNBxx20 (xx=06, 08, 10, 12......72)SNBxx30 (xx=06, 08, 10, 12......72)SNBxx40 (xx ... =04, 06, 08, 10......72)SNBxx80 (xx=02, 04, 06, 08......20)Light axis pitch 20mm, ... .The control box processes the signal and outputs the closed or opened signal used safety relay,and ... the follow-up control circuit correspond to safety requirements and provide DC24V power source.(6)Prompts ...