Here are the analog module symbols for the DL 05/06 chassis.
Here are the discrete I/O module symbols for the DL 05/06 chassis.
This symbol is a degree wheel or protractor. There are 360 ticks.
Here is a digital multi-meter symbol.
Here are some 19" rack panels symbols. They are in quarter scale.
Parallax's Board of Education (Serial) symbol.
These batteries symbols go with my PCB symbols.
A symbol for Parallax's BS2 Homework Board.
These are the PLC micro chassis: DL06. The symbols are similar, but each has a different silkscreen.