... =02, 04, 06, 08......20)Light axis pitch 20mm, 30mm, 40mm, 80mmProtection height=(xx-1)×light axis pitchSNBxx20 100,140,180,220 ... 2)Light curtain form:Direct transmission type(3)Standard configuration:Emitter/1,Receiver/1,N type controller/1,Signal cable 3m/1 root, 5m/1 ... (terminals) or DC24V; W type, outside installation,control 1 set light curtain,the power source is AC220V/110V(switch conversion) ...