The Eden OSSD safety sensors allow safe in-series wiring of multiple sensors. The Eden OSSD safety sensor operates as an output signal-switching device (OSSD) for "stop" commands to prevent hazardous movements. The Eden OSSD safety sensor is an interlocking device for gates, hatches and doors. It communicates with OSSD signals and can be connected to any safety module that handles them. The Eden OSSD safety sensor uses no contacts and is neither magnetic nor mechanical. It uses solid-state technology with no moving parts, which eliminates the cost and potential danger of using mechanically keyed interlock safety switches and non-contact magnetic safety switches.