These contacts are open in their default state and close when the relay is activated. Instantaneous expansion modules typically provide additional NO contacts. These contacts are closed in their default state and open when the relay is activated. Both instantaneous and delayed modules can provide additional NC contacts if needed.
Suitable for applications where safety functions need immediate action, such as emergency stop circuits or interlock systems. http://www.pilz.com Useful for applications requiring a controlled shutdown or delay before safety functions are engaged, such as in certain process control or sequential operations. Safety solutions provider since 2011 in Indonesia markets.