Glossary-4
ET 200L Distributed I/O Device
EWA-4NEB 780600902-05
G
The conductive earth whose electrical potential can be set to zero at any
point.
Around grounding electrodes, the earth may have a potential other than zero.
The term ”reference ground” is frequently used in this connection.
Grounding means to connect an electrically conductive part to the grounding
electrode by means of a grounding system.
I
DIN 40050 degree of protection: Protection against finger contact and against
solid foreign matter more than 12 mm in diameter.
L
A power supply unit for the ET 200L distributed I/O device and the process
devices connected to it.
M
When it is in possession of the token, a master can send data to other nodes
and request data from other nodes (synonymous with active node).
The CPU 315-2 DP and the IM 308-C can be DP masters, for example.
N
A device that can send, receive or amplify data via the bus (e.g. a DP master,
DP slave, RS 485 repeater or active star coupler).
In the case of non-isolated input/output modules, the reference potentials of
control and load circuits are electrically connected.
Ground
Grounding
IP 20
Load power sup-
ply unit
Master
Node
Non-isolated
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