00772425 datasheet(30/42 Pages) BURKERT

30 / 42 page

Type büS

büS network shielding

11.6

Mixed network with various shieldings

A planned büS network (a) is revised, some issues were identified (b) and finally some solutions are

found (c).

a) Initial network

Gateway

Device 1

(Direct)

Building A:

Equipotential, clean FE

Device 3

(Direct)

Device 6

(Direct)

Device 2

(RC)

Building B:

Equipotential, clean FE

Device 5

(Direct)

Device 7

(None)

Device 4

(Direct)

Outside building A

FE medium quality

Fig. 33: Initial network

b) Problem identification

Gateway

Device 1

(Direct)

Building A:

Equipotential, clean FE

Device 3

(Direct)

Device 6

(Direct)

Device 2

(RC)

Building B:

Equipotential, clean FE

Device 5

(Direct)

Device 7

(Direct)

Device 4

(Direct)

Outside building A

FE medium quality

Identified issues:

FE with potential differences between building A and B

FE with potential differences between building A and outside

Long büS line with open shield to device 7 with no shield connection.

Fig. 34: Problem identification

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