Electronic safety system for escalators

The invention provides a passenger conveyor safety system (30) comprising a control unit (32), and a safety controller (34) in communication with said control unit (32). Said safety controller (34) communicates over a bus (40) with a plurality of bus nodes (42). Each of said bus nodes (42) receives data from at least one sensor (44). Said safety controller (34) is operable to send a signal to said control unit (43) in response to said data received from said plurality of bus nodes (42). At least one sensor includes a plurality of sensors (44) communicating with a common bus node (42).