1 Safety
ControlCare Panel PC SPC150
4
Hauser
1.6
Conventions and icons
In order to highlight safety relevant or alternative operating procedures in the manual, the following
conventions have been used, each indicated by a corresponding icon in the margin.
Safety conventions
Explosion protection
.
Electrical symbols
.
Icon
Meaning
A note highlights actions or procedures which, if not performed correctly, may indirectly affect operation
or may lead to an instrument response which is not planned
Caution!
Caution highlights actions or procedures which, if not performed correctly, may lead to personal injury or
incorrect functioning of the instrument
Warning!
A warning highlights actions or procedures which, if not performed correctly, will lead to personal injury,
a safety hazard or destruction of the instrument
Icon
Meaning
Device certified for use in explosion hazardous area
If the device has this symbol embossed on its name plate it can be installed in an explosion hazardous area
in accordance with the specifications in the certificate or in a safe area
Explosion hazardous area
Symbol used in drawings to indicate explosion hazardous areas. Devices located in and wiring entering
areas with the designation “explosion hazardous areas” must conform with the stated type of protection
Safe area (non-explosion hazardous area)
Symbol used in drawings to indicate, if necessary, non-explosion hazardous areas. Devices located in safe
areas stiill require a certificate if their outputs run into explosion hazardous areas.
Icon
Meaning
Direct voltage
A terminal to which or from which a direct current or voltage may be applied or supplied
Alternating voltage
A terminal to which or from which an alternating (sine-wave) current or voltage may be applied or
supplied
Grounded terminal
A grounded terminal, which as far as the operator is concerned, is already grounded by means of an earth
grounding system
Protective grounding (earth) terminal
A terminal which must be connected to earth ground prior to making any other connection to the
equipment
Equipotential connection (earth bonding)
A connection made to the plant grounding system which may be of type e.g. neutral star or equipotential
line according to national or company practice
