ABB DSBB110A 57330001-Y Shield Board – Reliable Rack Shielding for Cleaner, More Stable Signals

The ABB DSBB110A (57330001-Y) is a shield board used in ABB control racks to provide proper grounding and electromagnetic shielding between modules. In many cases, it’s the quiet helper that stabilizes analog and mixed-signal I/O by reducing noise coupling and improving EMC performance.

From my experience, plants typically fit this board in I/O or controller frames where sensitive signals sit next to higher-energy wiring. If you’re troubleshooting intermittent analog drift, crosstalk, or unexplained noise spikes, a healthy shield board like DSBB110A can make a very real difference.

• Dedicated shielding and grounding – Establishes a stable reference and reduces EMI routed through the rack backplane.

• Passive, maintenance-friendly design – No firmware, no configuration; typically install and verify bonding, then you’re done.

• Supports mixed-signal environments – Helps protect low-level analog inputs running near digital or power lines.

• Rack plug-in form factor – Designed to fit ABB control/I&O frames; easy replacement during scheduled downtime.

• Stability over time – Consistent shielding performance that, in many cases, extends the useful life of the existing installed base.

You’ll typically see DSBB110A deployed anywhere sensitive measurements share enclosure space with switching devices or high-current circuits:

• Power generation and substations – stabilizing low-level transducer and 4–20 mA signals near high-voltage sections.

• Oil & gas and petrochem – mixed analog/digital racks with VFDs or relay outputs in the same cabinet lines.

• Pulp & paper, metals, cement – long cable runs and noisy environments where better shielding yields steadier control loops.

• Water & wastewater – minimizing crosstalk in compact control rooms with dense I/O marshalling.

• Reliability bump without redesign – Improves rack-level EMC behavior while keeping your existing I/O and controllers in place.

• Lower maintenance noise-chasing – In many cases, reduces recurring signal noise tickets and nuisance trips.

• ABB ecosystem fit – Mechanical and electrical fit for ABB racks; minimizes integration risk compared to ad?hoc shielding fixes.

• Cost-effective lifecycle support – A straightforward replacement part to keep legacy racks steady and compliant.

One thing I appreciate is how quickly technicians can swap this board during a routine shutdown. We’ve heard comments like, “after installing DSBB110A, the analog trends settled down and we stopped seeing those random spikes,” which seems to be a common outcome in noise-sensitive cabinets.

• Cabinet/rack – Install in the specified slot per your rack drawing. Ensure all card guides are intact and the backplane connector is clean.

• Grounding – Confirm low-impedance bonding to the chassis earth. Verify shield drain continuity and avoid ground loops.

• Ventilation – Keep cabinet airflow unobstructed; maintain ambient within the host rack’s temperature rating.

• Wiring – Route analog and digital wiring separately where possible; tie cable shields at the designated end per site EMC policy.

• Safety – De-energize the rack or follow hot-swap procedures if permitted by your system. Use ESD protection when handling boards.

• Routine checks – Periodically inspect for oxidation on contacts, confirm tight ground points, and review noise levels during maintenance rounds.

• Manufactured to ABB quality standards for industrial control components.

• CE conformity typically applies when installed within a certified ABB system/cabinet.

• UL/CSA recognition varies by cabinet and system; check the rack-level certification set for your site.

• RoHS compliance may depend on production batch and market; verify if your project requires RoHS documentation.

• Warranty: commonly 12 months from shipment for new, factory-supplied units (confirm availability and terms for your region).