Wiring between DCS cabinets
This guide summarizes field-proven rules for AI/AO/DI/DO wiring, shows how to choose between NO/NC contacts under the fail-safe principle, and explains how to decode typical cable schedule entries. Marshalling cabinets are used to organize and protect the field wiring in a control system, making it easier to maintain and troubleshoot the system. A PLC connection represents the signal flow starting from the field transmitters, junction box, marshalling cabinet, system cabinet and Human-Machine Interface for the operator graphic display. Information contained herein is to be used solely for the purpose submitted, and no part of this document or its contents shall be reproduced, published, or disclosed to a third party without the express permission of Honeywell International. In this video, we break down PLC and DCS wiring diagrams with real-world examples.
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