Fig. 60: Example: Identification of externally supplied documenta-
tion
In industrial technology of today it is quite common to integrate
externally supplied electric sub-systems into the projecting of
machines. These systems may be composed of various compo-
nents and wirings. For easier differentiation of BOMAG designation
and manufacturer identification the latter appears under the
BOMAG designation with a text frame and a reduced character
height.
Fig. 61: PLC box representation
The PLC box representation of connecting pins uses a table with
associated connecting plugs, which are used in connection with the
machine functions. The table symbols can be arranged in a line, if
necessary. Connections which are not used do not need to be rep-
resented. The PLC box representation enables the representation
of further reaching functional descriptions to the individual compo-
nent connections.
The PLC box representation is mainly used for controls with
BOMAG software, or for electronic devices which were specified
accordingly, and where information on the assignment of signals is
available.
Identification of similar, adjacent circuit symbols
In circuit diagrams, symbols of the same type are often arranged in
series or close to each other. In such cases it is common practice
to reduce the identification on the subsequent symbol to the cri-
teria, which are different from the previous symbol on the left.
Identification of externally supplied
documentation
PLC box representation (-A66)
Electric systems – Basic principles
BW 900-50
78
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