Atec Agilent-ECP-E26A - Manual (Page 8)

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PROTECTIVE CONDUCTOR TERMINAL.
Frame or chasis TERMINAL.
Equipotentiality.
On (Supply).
Off (Supply).
Equipment protected throughout by DOUBLE INSULATION or
REINFORCED INSULATION.
Caution, risk of electric shock.
Caution, hot surface.
In position of bi-stable push control.