EC: DeltaV Intrinsic Safety CHARMs
Safety – Process safety, intrinsic safety: As an extension of DeltaV Electronic Marshalling, Intrinsic Safety CHARMs from Emerson Process Management provide significant savings in system design, installation cost, and ease of maintenance—with the added intrinsically safe circuitry for field wiring into hazardous areas, including Zone 1, Zone 0, or Class 1 Div1. This is a Control Engineering 2012 Engineers’ Choice award winner.
Building on its innovative Electronic Marshalling and single-channel characterization module (CHARM) technology, Emerson Process Management introduces its latest offering, intrinsically safe (IS) CHARMs.
Electronic Marshalling with CHARMs is a key component of Emerson's I/O on Demand strategy, which provides solutions for all types of I/O interconnection: point-to-point, bussed, and wireless. IS CHARMs deliver a reduced footprint and eliminate the need for separate barriers and the associated intercabinet wiring. A smaller footprint and fewer connections improve the reliability of the installation and deliver significant cost savings.
The DeltaV CHARM I/O Card (CIOC) supports both conventional and IS CHARMs, providing unprecedented flexibility in control system I/O topology. I/O can be added anywhere it is needed using standard Ethernet infrastructure hardware. Each I/O channel has a dedicated CHARM that provides both signal characterization and galvanic isolation for intrinsically safe applications. IS barriers are integrated inside the CHARM to provide single-channel fault isolation, as well as electrical isolation and energy-limiting circuitry that meets IEC Ex ia ratings. IS CHARMs signal types include: IS AI 4-20 mA HART, IS AO 4-20 mA HART, IS DI Namur, and IS DO 24 Vdc.
Emerson Process Management
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