Originally posted by: aiden251181
i was just wondering if there are any regs on e/stopping a motor through a plc? can you do this or do you have to use an e/stop monitoring relay?
Machinery Directive 2006/42/EC
Guidance documents include:
EN12100 - safety of machinery: basic concepts
EN14121 - safety of machinery: risk assessment
EN13849 - safety of machinery: safety related parts of control systems
EN62061 - safety of machinery: functional safety of electrical, electronic and programmable electronic control systems
So, dependant on category of risk it is highly likely that implementing a safety circuit through an automation controller is only allowable if the controller has a verified safety rating commensurate with the risk assessed.
Again, if a hard wired safety circuit is to be used then it must be verified as above.