CLEARSY’s RS4 safety relays are used by RATP for the safe management of platform screen door closure in metro stations. These relays control the SIL4 ‘Closed and locked’ signal, interfacing with the control unit for each metro platform gate (DCU).
This electrical circuit performs a safety ‘AND’ between each state of the platform door and consolidates the ‘Closed and locked’ state at platform level. This is reported by a signal visible to the driver (light), which allows the train to leave the station once all platform gates are physically closed and locked.
On line L14 of the Paris metro, RATP highlights the greater reliability of the architecture based on RS4 safety relays. Strong customer/user feedback demonstrates the quality of the product.