The SICK LFP1000-A4NMB is a Type 4 (Category 4 according to IEC 61496-1/2) safety light curtain system. It is designed to safeguard personnel by creating an invisible protective field around hazardous machinery, such as presses, robots, or automated manufacturing equipment. When the infrared light beams between the transmitter and receiver are interrupted, the device sends a stop signal to the machine's safety control system, halting operation and preventing injury.