Siemens simatic et 200s User Manual page 23

Non-isolated measuring encoders
The non-isolated measuring encoders are connected to the local ground potential. You must
connect M
potential differences U
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
①
②
③
④
⑤
2AI U HF analog electronic module (6ES7134-4LB02-0AB0)
Manual, 04/2007, A5E01076007-01
to the ground potential. Depending on local conditions or interference,
ANA
(static or dynamic) can occur between the locally distributed
CM
CM
4
Logic
Backplane bus
Ground bus
Equipotential bonding conductor
Non-isolated measuring encoders
is exceeded, there must be equipotential bonding conductors
1
3
5.1 Connecting measuring sensors
2
Connecting
23