Communication system for a hydrogen refuelling system

1. A Hydrogen Refueling Station (HRS; Hydrogen Refueling Station) comprising at least:

a HRS center module,

a HRS dispenser module, and

a first hydrogen supply line facilitating flow of hydrogen between the HRS center module and the HRS dispenser module, wherein

the HRS center module comprises a safety controller and a process controller, wherein the software program on the safety controller is different from the software program on the process controller,

wherein the software program of the safety controller implements a plurality of safety instrumented functions established to monitor the operation of the HRS performed by the process controller,

wherein data is communicated between the safety controller and safety components of the HRS dispenser module via a safety communication channel,

wherein data is communicated between the process controller and process components of the HRS dispenser module via a process communication channel wherein the safety communication channel and the process communication channel are two separate communication channels, and

wherein one of the safety components and one of the process components are measuring the same value of the HRS.

2. A HRS according to claim 1 , wherein the HRS further comprises a hydrogen storage module fluidly connected with a second hydrogen supply line,

wherein data is communicated between the safety controller and safety components of the hydrogen storage module via a safety communication channel, and

wherein data is communicated between the process controller and process components of the hydrogen storage module via a process communication channel.

3. A HRS according to claim 1 , wherein the safety components and the process components are selected from the list comprising: valve, temperature sensor, pressure sensor, valve positioner, flow sensor, leakage sensor, UV/fire sensor.

4. A HRS according to claim 1 , wherein the safety components are communicating with the safety controller via safety I/O modules and wherein the process components are communicating with the process controller via process I/O modules.

5. A HRS according to claim 1 , wherein the HRS center module further comprises a center safety I/O module communicating with a dispenser safety I/O module and a center process I/O module communicating with a dispenser process I/O module.

6. A HRS according to claim 5 , wherein a cable facilitates the communication between center safety I/O module and the dispenser safety I/O module and between the center process I/O module and the dispenser process I/O module.

7. A HRS according to claim 1 , wherein at least one of the safety and process communication channels is implemented as a cable feed between the HRS center module and HRS dispenser module below ground level.

8. A HRS according to claim 1 , wherein the safety communication channels using PROFINET fail safe over EtherCAT or PROFIsafe communications protocols.

9. A HRS according to claim 1 , wherein the process communication channels are using EtherCAT communication protocol.

10. A HRS according to claim 1 , wherein at least one of the safety and process communication channels is implemented as cables, wherein at least one cable is at least partly feed below ground level in a duct between the HRS center module and the HRS dispenser module in a cable pipe within the duct.

11. A HRS according to claim 10 , wherein the duct has a removable top cover.

12. A HRS according to claim 10 , wherein the first hydrogen supply line is at least partly fed in the duct between the HRS center module and the HRS dispenser module.

13. A HRS according to claim 10 , wherein the duct facilitates feeding a hydrogen return line, a hydrogen vent line, a cooling line forward, a cooling line return, and/or power cables.

14. A HRS according to claim 10 , wherein the duct is equipped with a hydrogen sensor for detecting leakages of hydrogen in the duct.

15. A HRS according to claim 14 , wherein the hydrogen sensor is accessible via a well extending from ground level to the duct.

16. A HRS according to claim 1 , wherein the first hydrogen supply line is grounded at least every 15 meters.

17. A HRS according to claim 1 , wherein the first hydrogen supply line is grounded at least every 10 meters.

18. A HRS according to claim 1 , wherein the first hydrogen supply line is grounded at least every 5 meters.

19. A Hydrogen Refueling Station (HRS; Hydrogen Refueling Station) comprising at least:

a HRS center module including a process controller and a safety controller, said safety controller configured to operate the HRS independently of said process controller;

a HRS dispenser module separated by a distance from said HRS center module, said HRS dispenser module including process components controlled by said process controller and also including safety components controlled by said safety controller; and

a first hydrogen supply line facilitating flow of hydrogen between the HRS center module and the HRS dispenser module;

a safety communication channel providing data communications between said safety controller and said safety components; and

a process communication channel providing data communications between the process controller and process components.

20. A Hydrogen Refueling Station (HRS; Hydrogen Refueling Station) comprising at least:

a HRS center module including a process controller and a safety controller separate from said process controller;

a HRS dispenser module separated by a distance from said HRS center module, said HRS dispenser module including process components controlled by said process controller and also including safety components controlled by said safety controller; and

a first hydrogen supply line facilitating flow of hydrogen between the HRS center module and the HRS dispenser module;

a safety communication channel providing data communications between said safety controller and said safety components via; and

a process communication channel separate from said safety communication channel providing data communications between the process controller and process components, wherein

at least one of the safety or said process communication channels is implemented as cable at least partly fed below ground level in a duct between the HRS center module and the HRS dispenser module in a cable pipe within the duct, said duct being equipped with a hydrogen sensor for detecting leakages of hydrogen in the duct.