If beams are broken, the system sends a "stop" signal to the guarded machine. The system has a range of 30'.
Machine guarding system
Banner Eng. (Minneapolis, MN) has developed a new electronic machine guarding system with a compact, low-cost, DIN-rail mountable control box. It uses an optoelectronic emitter, receiver and a 24v DC control box to generate a "screen" of infrared light beams between a hazardous machine and personnel.