AMNYTT amnytt.no 4/2022 | Page 82

6 Endress + Hauser Nytt 4 Ethernet-APL

Flexible network design

With Ethernet-APL it is possible to realize different topologies – depending on the requirements of the process plant . In general , it can be distinguished between star topologies as well as trunk and spur topologies .

Ethernet-APL topologies

< 100 m / 328 ft ( copper ) < 2000 m / 6562 ft ( fiber optic )

APL field switches

Trunk < 1000 m / 3281 ft APL field switches

2nd channel

Zone 2 Div . 2

Zone 1 Div . 2

Facility Ethernet Ethernet-APL with increased safety Ethernet-APL with intrinsic safety Power supply

Spur < 200 m / 656 ft Spur < 200 m / 656 ft

Zone 0 Div . 1

Ethernet-APL architecture variations

Star topology Trunk and spur topology

APL field switch

• Externally powered

• Installation in Zone 2 / Div . 2 or Zone 1 / Div . 2

• Spur ports for Ex ic or Ex ia

• Different number of spur ports

• Powered via trunk

• Installation in Zone 2 / Div . 2 or Zone 1 / Div . 2

• Spur ports for Ex ic or Ex ia

• Different number of spur ports

Cable spur line Fieldbus cable type A ( IEC 61158-2 ) Fieldbus cable type A ( IEC 61158-2 ) Cable trunk

Integration to plant Ethernet via standard industrial Ethernet with copper or fiber optics

Fieldbus cable type A ( IEC 61158-2 )

Independent of the topology , the upper layer integration is the same – via standard Ethernet mechanisms .

• Integration to process control system via the industrial Ethernet protocol functionalities ( e . g . via GSD for PROFINET )

• Integration to an asset management tool ( e . g . FieldCare ) via device driver ( FDI Package )

• Web server of the devices can be accessed via the standard Ethernet protocol http

• For IIoT , the data can be transferred easily via edge devices to upper layer applications where digital services can provide the added value based on the valuable data from the field level