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Glossary
TN-S system
In a TN-S system, the neutral conductor (N) and protective conductor (PE) are wire with
separate insulation. The neutral conductor is connected to the grounded protective
conductor at a central point, and only there. The protective conductor can be grounded any
number of times.
Transmission rate
The transmission rate specifies the number of bits transmitted per second.
ungrounded
Having no conductive connection to earth
User data flag
Each IO module is assigned a value in the input or output data message; this value provides a
statement on the quality of this user datum. For example, outputs of a specific module can be
switched off by means of this without affecting other modules.
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Hardware Installation and Operating Manual, 07/2020, A5E50018670-AA
PN/MF Coupler
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