I want to improve a semi custom product I am delivering to a customer with implementation of safety relays. The system is fairly simple with just a couple of small motors and a couple solenoid valves. All of these are to be controlled through the PLC. All of which are designed to go to a fail condition in an E-STOP state. One Local E-Stop pushbutton and one set of contacts in for a remote input.
Traditionally I would just use a NON safety rated relay. The Local and remote Estops in Series to the Coil. The NO contacts would be in series with the Digital Output Common terminal of PLC.
I can of course do the same with a safety relay but there has to "more" to this to improve the product. Can anyone elaborate how to improve this?
Traditionally I would just use a NON safety rated relay. The Local and remote Estops in Series to the Coil. The NO contacts would be in series with the Digital Output Common terminal of PLC.
I can of course do the same with a safety relay but there has to "more" to this to improve the product. Can anyone elaborate how to improve this?