D301087 0308 - BL20 CANopen 9-7
9
Potential free
Galvanic isolation of the reference potentials in I/O modules of the control and
load circuits.
Potential linked
Electrical connection of the reference potentials in I/O modules of the control
and load circuits.
Protective earth
Electrical conductor for protection against dangerous shock currents. Gener-
ally represented by PE (protective earth).
Radiation coupling
A radiation coupling appears when an electromagnetic wave hits a conductive
structure. Voltages and currents are induced by the collision. Typical sources
of interference are e. g. sparking gaps (spark plugs, commutators from electric
motors) and transmitters (e. g., radio), that are operated near to conducting
structures.
Reaction time
The time required in a bus system between a reading operation being sent and
the receipt of an answer. It is the time required by an input module to change
a signal at its input until the signal is sent to the bus system.
SDO
see Chapter 2 "Short description of CANopen", Page 2-4.
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