Dhanam Electricals distributes Safety Light Curtain with LED indicator. Dhanam Electricals is a distributer of industrial automation system and automation control system includes SMPs, electronics relays, electronic control relays, electronic monitoring relays, transducers, electronic sensors and safety light curtains used in automatic doors, HVAC systems, plastic machinery, elevators and chemical, automobile, packaging and windmill industries. Safety Light Curtain is a kind of switching mode power supply unit. Safety Light Curtain provides the power supply function through components such as capacitors, inductors, transformers and switches that are in one of two states, on or off.