Tag: Interlocks

Software vs. Hardwired Interlocks: Part II

8 days ago 17

✕ Last month’s column introduced the concept of an interlock. An interlock is a dependency between two processes. Process 2 cannot operate unless Process 1 is in a certain state. For example, if a supply air duct static safety switch triggers...

Software vs. Hardwired Interlocks: Part I

February 3, 2025 34

✕ The devil is in the details. This especially runs true when it comes to the automation of HVAC systems. The slightest nuances, if misunderstood, can have devastating effects. One prime example is the importance of understanding the difference...