Siemens 2AI 2/4WIRE HF Manual page 24

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Connecting
5.1 Connecting measuring sensors
Non-isolated measuring encoders
The non-isolated measuring encoders are connected to the local ground potential.
Depending on local conditions or interference, potential differences U
can occur between the locally distributed measuring points.
If the permitted value for U
between the measuring points.
The following schematic representation illustrates the connection of non-isolated measuring
encoders to an optically isolated analog input module.
5
Operating four-wire transmitters on an external voltage supply
If there is electrical isolation between the output and the transmitter supply, you can connect
the transmitter to the 2 AI I 2/4WIRE without the need for additional connections.
24
4
Logic
Backplane bus
Ground bus
Equipotential bonding conductor
Non-isolated measuring encoders
is exceeded, there must be equipotential bonding conductors
CM
3
2 AI I 2/4WIRE HF analog electronic module (6ES7134-4MB02-0AB0)
CM
1
2
Manual, 04/2007, A5E01076111-01
(static or dynamic)

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