Outpusignal

n output signal switching device (or OSSD) is the interface of a sensor (such as a light curtain) designed for reliably signalling a safety-related event, usually the light curtain beams being "broken". OSSD signals are outputs from the protective device (light curtain or scanner) to a safety relay. OSSD outputs are typically semiconductor or transistor outputs, as opposed to relay or contact type outputs. There are usually two independent channels, so-called OSSD1 and OSSD2.