destination. In addition, each logic function shown on
the sheet is tagged to identify the function hardware and
to show function location both on the diagram and
within the equipment.
For example, in the OR function 5C3A at the top
left in figure 6-13, the 5 identifies sheet number 5, C3
the drawing zone, and A the drawing subzone (the A
section of module 5C3). The M14 is the module code
number, which identifies the circuit by drawing number.
The X15 is the partial reference designation, which
when preceded by the proper reference designation
prefix, identifies the function location within the
equipment as described earlier.