How to implement a Normally Closed Relay contact with Termination Unit NTDO02 in Infi
We need to implement a Fail Safe Run Motor (i.e. Motor will remain running when DCS Fails), For that reason we need to invert the DO (with NOT Block in Composer). But the problem that we have is how to implement this funtionality from the hardware point of view. We are using a NTDO02 Termination Unit, which type of contact we need NO (Normally Open) or NC (Normally Close), which type of contact can support this Termination Unit?