Siemens 2AI 2/4WIRE HF Podręcznik - Strona 23

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Isolated measuring encoders

The isolated measuring encoders are not connected to the local ground potential. These can

be potential-free. Depending on local conditions or interference, potential differences U

(static or dynamic) can occur between the measuring lines M- of the input channels and the

reference point of the measuring circuit M

The permitted value for U

interference.

The following schematic representation illustrates the connection of isolated measuring

encoders to the optically isolated analog input modules.

①

②

③

④

⑤

2 AI I 2/4WIRE HF analog electronic module (6ES7134-4MB02-0AB0)

Manual, 04/2007, A5E01076111-01

must not be exceeded, even in environments with strong EMC

Logic

Backplane bus

Ground bus

Central grounding point

Isolated measuring encoders

ANA

5.1 Connecting measuring sensors

Connecting