WirelessHART Adapter SWA70
1 Safety instructions
Hauser
11
Electrical symbols
Symbol
Meaning
Direct current
A terminal to which DC voltage is applied or through which direct current flows.
Alternating current
A terminal to which alternating voltage (sine-wave) is applied or through which alternating cur-
rent flows.
Ground connection
A grounded terminal which, as far as the operator is concerned, is already grounded via a ground-
ing system.
Protective ground connection
A terminal which must be connected to ground prior to connecting any other terminals.
Equipotential connection
A connection that has to be connected to the plant grounding system: This may be a potential
equalization line or a star grounding system depending on national practice or company codes of
practice.
Содержание SWA70
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