Task: Inserting Two Interlock References into an Existing Electrical Schematic
We start with a relay coil symbol that is interlocked
with an emergency-stop pushbutton and a seal-circuit
contact. The task is to add two more interlock symbols
to the existing circuit.
Steps
1. Insert limit switch contact into an existing wire
2. Insert a relay contact into a branching wire
3. Add new wire numbers as required
Study Results
In basic AutoCAD, the geometry for the limit switch and relay contact were readily available because existing instances of these
block inserts were already present in the drawing. But one component block symbol instance had to be manually rotated to
align itself with the underlying wire. One thing that made basic AutoCAD slower was the fact that neither symbol’s block insert
broke and reconnected with the underlying wire. This was a manual task requiring either using the AutoCAD BREAK or TRIM
command. Finally, new wire numbers had to be manually typed in on the two new wires. Using AutoCAD Electrical resulted in
an
83% time savings over basic AutoCAD.
Advantages of AutoCAD Electrical
• It’s easy to navigate and choose from the extensive library of component symbols through the icon menu—colorful,
customizable.
• Inserted symbols automatically align with the orientation of any underlying wire.
• Existing wiring automatically breaks and reconnects to the inserted symbols.
• New, unique wire number assignments automatically generate for split wire pieces.
Productivity Gain* AutoCAD AutoCAD Electrical
Number of Commands Utilized 6 1
Number of Times Commands Were Accessed 11 2
Total Number of User Picks and Clicks 49 8
Total Time to Complete Task (minutes, seconds) 1:33 :16
Time Saving with AutoCAD Electrical — 83%
1. Thousands of Standards-Based Schematic Symbols
2
AutoCAD Electrical software ships with more than 2,000 standards-based
schematic symbols. A simple, icon-menu-driven system for inserting
electrical, pneumatic, hydraulic, and P&ID devices is provided, allowing
you to quickly build standards-based control designs by simple pick-
and-place. These are “smart” symbols in many ways, one of which is that
wiring automatically breaks and connects to them.
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