A black box device such as an emergency stop relay can often be represented in a multitude of ways dependent upon the customer.
The device may be shown:
- As a one unit in the schematics
- As a primary device in one drawing with secondary contacts being displayed separately on different pages
- As a primary device on one drawing (e.g. power part) and the secondary (control) part on a different drawing.
In this Electrical Designer tips and tricks we will look at how each method is achievable.