Emerson KJ4002X1-BA1 Vertical Right Side 8‑Wide Carrier for DeltaV S-series I/O

The Emerson KJ4002X1-BA1 is a Vertical Right Side 8-wide carrier designed for DeltaV S-series I/O. It provides a robust, passive backplane for up to eight I/O modules, routing power and the I/O bus while keeping wiring neat and maintenance straightforward. From my experience, this is the piece you use when you’re building out a vertical DeltaV node and need the right-hand segment to finish the rack with clean, reliable connectivity.

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Key Features

• 8-wide vertical carrier: Holds up to eight DeltaV S-series I/O modules in a right-side vertical configuration.
• Passive backplane design: No local power consumption; distributes system 24 VDC and I/O bus signals to installed modules.
• DeltaV I/O bus connectivity: Provides the internal backplane interface for reliable module communication.
• Mixed I/O support: Works with AI, AO, DI, DO, HART, RTD, and thermocouple modules—mix and match as the process requires.
• Clean wiring and service access: Modular layout keeps field terminations organized and simplifies maintenance.
• Right-side segment: Complements the left-side vertical carrier to complete a full vertical I/O assembly.

Technical Specifications

Brand / Model	Emerson KJ4002X1-BA1 (Vertical Right Side 8‑Wide Carrier)
HS Code	8538.90 (Parts for switching/control panels and apparatus)
Power Requirements	Passive carrier; receives and distributes system 24 VDC via DeltaV backplane
Dimensions & Weight	8-slot vertical carrier; mechanical size matches Emerson DeltaV vertical 8‑wide standard; weight varies with installed modules
Operating Temperature	Typically 0 to 55°C for installed DeltaV assemblies (follow cabinet and system guidelines)
Signal I/O Types	Supports AI, AO, DI, DO, HART, RTD, and thermocouple via corresponding S-series I/O modules
Communication Interfaces	DeltaV I/O backplane; no external fieldbus/serial port on the carrier itself
Installation Method	Cabinet-mounted, vertical orientation (right-side segment); mates with adjacent DeltaV carriers and field termination assemblies

Application Fields

This carrier is commonly used in DeltaV-based DCS cabinets across oil & gas, refining, chemicals, power generation, water/wastewater, and pharmaceuticals. You might notice that engineering teams choose it when they need a compact vertical layout, especially in brownfield cabinets where space is tight but spare I/O density matters.

• Plant-wide control cabinets with mixed analog and discrete I/O
• Unit skids and packaged equipment requiring neat vertical I/O expansion
• Pharma and fine-chem installations where maintainability and clear wiring are critical
• Utility and power islands where modular spares reduce downtime

Advantages & Value

• Reliability: Passive backplane means fewer points of failure; the carrier simply routes power and bus signals reliably.
• Compatibility: Seamless fit with DeltaV S-series I/O modules and mating vertical carriers.
• Lifecycle savings: Standardized layout reduces engineering hours during expansions and speeds up maintenance in many cases.
• Serviceability: Clear slotting and cable management make swap-outs quick—ideal for turnaround windows.
• Technical support: Widely deployed, so guidance and spare planning are straightforward.

Installation & Maintenance

• Cabinet requirements: Mount in a clean, ventilated control cabinet; follow DeltaV vertical 8-wide spacing and grounding practices.
• Ventilation: Provide adequate airflow; avoid hot spots near power supplies or VFDs.
• Wiring: Use the designated field termination assemblies and observe shield/drain wiring guidelines to limit noise.
• Safety: De-energize system 24 VDC and follow lockout/tagout before inserting or removing modules.
• Routine checks: Inspect carrier connectors and module seating during scheduled outages; keep contacts clean and free of debris.
• Firmware & calibration: The carrier is passive; keep I/O module firmware current per Emerson recommendations.

Feedback from a chemical plant maintenance lead: “Swapping a faulty I/O module on this carrier took minutes. The vertical layout kept the wiring accessible, which usually saves us a service call.”

Quality & Certifications

• Manufacturer certifications typically include CE and UL/cUL for industrial control equipment
• RoHS-conformant materials in many deployments
• Standard manufacturer warranty policies apply; we provide 365-day coverage on supply

Related/Supporting Components

• Emerson KJ4001X1-BA1 – Vertical Left Side 8‑Wide Carrier; pairs with KJ4002X1-BA1 to complete a vertical assembly.
• DeltaV S-series I/O modules – AI, AO, DI, DO, HART, RTD, and TC modules that plug into the carrier.
• Power/controller carriers and system power supplies – Provide the 24 VDC and system bus that the carrier distributes.

One thing I appreciate is how this carrier keeps expansions predictable—add the right-side 8-wide, slot in the needed I/O, and your wiring stays logical, which typically cuts commissioning time.