Advertisement
Marshalling in Electrical Systems Is organized arrangement and interconnection of signals between field devices (sensors, actuators, switches) and control systems (PLCs, DCS, SCADA). It acts as an intermediary point for signal routing, isolation, and conditioning.
Key Functions of Marshalling
1. Signal Routing
- Connects field instruments (e.g., temperature sensors, pressure transmitters) to control system I/O cards.
2. Isolation & Protection
- Prevents noise, surges, and ground loops from damaging sensitive control equipment.
3. Termination & Conversion
- Provides termination points for field wiring.
- Converts signals (e.g., 4-20mA to digital).
4. Testing & Maintenance
- Allows easy disconnection for troubleshooting without disturbing the main system.
Types of Marshalling
- Hardwired Marshalling– Traditional point-to-point wiring.
- Electronic Marshalling (e.g., DeltaV CHARMs, Emerson) – Software-configurable signal routing, reducing physical wiring.
Marshalling Cabinet vs. Junction Box
- Marshalling Cabinet
- Used for signal conditioning and routing.
- More complex (includes relays, isolators).
- Found in PLC/DCS systems.
- Junction Box
- Used for simple wire splicing.
- Less complex.
- Used in basic electrical circuits.
Applications
- Industrial automation (Oil & Gas, Power Plants)
- Process control systems
- Building Management Systems (BMS)
#Automation#instrumentation#Electrical#
Advertisement
Event Venue
Little Italy, New York, New York, United States
Tickets
Concerts, fests, parties, meetups - all the happenings, one place.
