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Electronic Marshalling delivers the flexibility to add I/O anywhere in the plant without affecting the control room cabinets. This is possible because Electronic Marshalling provides I/O type connectivity, like AI 4-20mA, AO 4-20mA, AI 0-10V, TC, RTD, DI Dry or Namur, DO High Side, Relays Contact Outputs or Isolated DI and DO for higher currents or higher VAC Voltages, in a single channel component — called a CHARM. CHARMs can be located in hazardous environments like Class1, Division 2 / Zone 2 Group A,B,C,D.

After a CHARM is in place, the channel can be electronically marshalled to any controller in the system. No marshalling cabinet or cross-wiring is needed. Fewer wires are involved and I/O locations do not have to be known upfront. Much less work is needed and fewer contact points for potential failures are given.

As neither re-design nor re-wiring is needed in case of a late project change, Electronic Marshalling lets you make changes without adding extra costs or impacting your start-up schedule.

CHARMs connect to the CHARM I/O Card (CIOC), which in turn can communicates to multiple controllers. Even if CIOC communication lines, and power distribution to the CHARMs are redundant, the system will alert you proactively if something in the field is happening. For example, the CIOC can monitor both 24VDC supply inputs and temperature to ensure reliable operation while being remotely mounted in a field enclosure in a harsh environment.