I/O on Demand Increases Operational Flexibility
Electronic Marshalling delivers the flexibility to add I/O anywhere in the plant without affecting control room cabinets. Electronic Marshalling provides I/O type connectivity in a single channel component – called a CHARacterization Modules (CHARM). CHARMs allows field wiring of any signal type to be terminated anywhere.This means no marshalling cabinet or cross-wiring, fewer wires, much less work, and fewer contact points for potential failures.
How It Works
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.
Featured Videos
Emerson’s Electronic Marshalling with Distributed CHARMs
We introduced the game-changing technology in DeltaV™ Version 11, now we are enabling you to install small enclosures with up to 12 CHARMs closer to the field devices dramatically reducing wiring and overall installation costs. We also simplified the deployment of Electronic Marshalling and Wireless field devices in existing installations by allowing CHARMs and Wireless devices to be assigned to our M-series controllers.
Emerson’s Electronic Marshalling with Distributed CHARMs
Electronic Marshalling/ASCO
Frequently Asked Questions
Yes. Emerson’s Electronic Marshalling solution reduces the amount of wiring required by simplifying I/O architecture and supporting distributed installation closer to field devices. This can lower material costs and reduce installation complexity.
DeltaV Electronic Marshalling replaces physical marshalling panels and cross-wiring. Instead of hard-wiring signals to fixed terminals, I/O is assigned in software at the channel level, eliminating manual routing and reducing wiring errors.
Yes, and this is a major benefit. With DeltaV Electronic Marshalling, wiring can start early because signal assignment happens later, meaning control strategy and wiring are no longer tightly dependent.
You typically don’t need to rewire anything. You can change the signal type by swapping or configuring the DeltaV CHARM and reassigning it in software, avoiding costly field changes.
Electronic Marshalling reduces installation costs by minimizing traditional marshalling hardware, reducing wiring requirements, and simplifying engineering activities. This streamlined approach can significantly lower both labor and project costs compared to traditional I/O architectures.
DeltaV Electronic Marshalling helps eliminate the need for extensive loop drawings and reduces traditional engineering tasks associated with physical marshalling. This streamlined design approach can accelerate project execution and simplify system implementation.
