Control system for a hydrogen refuelling station

A HRS for filling a vessel of a vehicle with hydrogen, the HRS comprising:

• a hydrogen supply,
• a hydrogen outlet fluidly connectable to the vessel of the vehicle, and
• a basic process control system comprising a process controller, a plurality of process measuring devices, a plurality of final process elements and a plurality of associated basic process control functions facilitating monitoring and controlling the operation of the HRS,
• characterized in that the HRS further comprises a safety instrumented system comprising a safety controller, a plurality of safety measuring devices, a plurality of final safety elements and a plurality of associated safety instrumented functions,
• wherein at least one of the final process elements and the final safety elements facilitates tripping the operation of the HRS under the control of the associated process controller or the associated safety controller respectively.