Why You Should Use Safety PLC
I’ve heard a lot of talk recently about safety PLCs. When should I use a safety PLC and when should I just use individual safety controllers? Well a lot of that has to do with your particular machine that you’re trying to guard.
If you have multiple zones on a machine, for example there’s 3 or 4 different doors that can be opened in order to clear a jam or maybe there’s some covers over different components that are spinning or possible pinch points, you’re typically going to protect those with some sort of safety device. Maybe it’s a safety switch or safety light curtain, each one of those are typically going to have a controller tied to it in order to monitor it and check for faults and ensure if someone opens a door or removes a cover that the machine stops in a safe manner.
If you’re dealing with a large machine where there may be multiple zones or multiple covers that you want to be guarding at the same time, you might choose to shut down only part of a machine if a certain event happens. In that case you can use a safety PLC. Just like its counterpart, the regular programmable logic controller or a PLC, you can wire in various inputs which would be like safety interlock switches, safety mats, safety light curtains and actually write a program that decides how to respond when it gets an input from one of those devices. For example, you can have a guard on one end of the machine open and it shuts down just that portion of the machine while it leaves the rest of the machine free to run.
Typically the breaking point is if you got more than 3 safety controllers on a given machine you probably want to start looking at a safety PLC. Very, Very, easy to implement, easy to program, and gets the job done.
If you’d like to learn more about how safety PLCs could help you in your application, take a look at innovativeidm.com. We would be glad to help and remember we are Home of the Legendary Customer Experience.