Emerson KJ4001X1-NB1 Horizontal LocalBus Dual Left Extender

Emerson KJ4001X1-NB1 Horizontal LocalBus Dual Left Cable Extender - DeltaV I/O Expansion Solution

The Emerson KJ4001X1-NB1 (12P3368X012) Horizontal LocalBus Dual Left Cable Extender enables flexible horizontal expansion of DeltaV distributed control system I/O architectures. This dual-connector left-side extender cable provides simultaneous power distribution and high-speed communication for multiple I/O carriers, supporting up to 12VDC at 8A for reliable operation in oil & gas, chemical, pharmaceutical, and power generation facilities requiring distributed control cabinet layouts.

Core Technical Specifications

• Model Number: KJ4001X1-NB1 (Alternate: 12P3368X012)
• Configuration: Horizontal dual left cable extender for side-by-side I/O expansion
• LocalBus Power: 12VDC at 8A maximum current capacity
• Connector Type: Dual left-side connectors for branching I/O carrier connections
• Operating Temperature: -40°C to +70°C (-40°F to 158°F)
• Maximum System Length: 6.5 meters combined (I/O carriers + LocalBus extenders)
• Environmental Protection: IP20 rating with ISA-S71.04-1985 Class G3 conformal coating
• System Compatibility: DeltaV M-series and S-series controllers with I/O carriers

Global Hazardous Area Certifications

Certified for deployment in classified industrial environments worldwide:

• FM/CSA North America: Class I, Division 2, Groups A-D, T4; Class I, Zone 2 applications
• ATEX Europe: Zone 2 certified for explosive atmosphere installations per Document 12P2046
• IECEx International: Compliant with global hazardous area standards
• Marine Certification: DNV and ABS approved for offshore platforms and maritime installations

Industrial System Architecture Applications

Horizontal Cabinet Expansion: Enable side-by-side placement of DeltaV I/O carriers within wide control cabinets and marshalling panels. The dual left configuration allows a single extender cable to branch LocalBus connectivity to two adjacent carriers positioned to the left of the main controller or power supply, optimizing cabinet real estate and reducing cable clutter.

Distributed Process Unit Control: Support multi-area control architectures where I/O carriers are organized by process unit or equipment group. The horizontal dual left extender enables logical grouping of field terminations for related process measurements (e.g., reactor zone 1 and zone 2) while maintaining electrical continuity across the LocalBus network.

Refinery Unit Operations: Organize I/O carriers by functional area within crude distillation, catalytic cracking, or alkylation units. The dual left branching capability allows efficient cabinet layouts where multiple I/O carriers serving the same process area can be powered and communicated from a single extender point, simplifying troubleshooting and reducing commissioning time.

Chemical Batch Manufacturing: Configure flexible I/O architectures for multi-product batch plants where different recipes require varying I/O point counts. The horizontal dual left extender accommodates phased capacity additions by enabling new I/O carriers to be added to existing LocalBus chains without rewiring the entire cabinet infrastructure.

Offshore Platform Installations: Maximize limited equipment room space on offshore oil & gas platforms by utilizing horizontal cabinet expansion instead of vertical stacking. The rugged construction withstands marine environments with 10g shock resistance and vibration tolerance up to 0.5g (16-150 Hz), critical for installations subject to wave motion and mechanical vibration from rotating equipment.

Dual Left Extender Architecture Advantages

Critical benefits for DeltaV I/O expansion and system flexibility:

• Branching Topology: Single extender cable supports two I/O carriers positioned to the left, reducing cable count and simplifying cabinet wiring
• Flexible Layouts: Accommodates asymmetric cabinet designs where I/O carriers are concentrated on one side of the controller or power supply
• Reduced Installation Time: Pre-assembled dual connector eliminates field termination errors and accelerates commissioning schedules
• Scalable Architecture: Add I/O capacity incrementally by connecting additional carriers to available dual left extender ports
• Simplified Troubleshooting: Logical left-side grouping of related I/O carriers simplifies fault isolation and maintenance procedures

Installation Requirements & Best Practices

Critical guidelines for reliable LocalBus operation:

Maximum System Length: The combined length of all I/O carriers and LocalBus extender cables must not exceed 6.5 meters. This includes the physical dimensions of carriers plus the length of all extender cables in the LocalBus chain. Exceeding this limit may result in communication errors, power delivery issues, or intermittent I/O failures.

Power Budget Management: Calculate total I/O module power consumption to ensure it remains within the 12VDC at 8A LocalBus capacity. The dual left extender supports two I/O carriers, so the combined power draw of all modules in both carriers must not exceed 8A. High-density analog input/output modules and HART-enabled CHARMs consume more power than discrete I/O.

Conduit Protection: All interconnecting cables between separate enclosures MUST be installed in conduit for mechanical protection and EMC compliance. This requirement applies to both hazardous and non-hazardous area installations to prevent cable damage from physical impact, rodent intrusion, or environmental exposure.

Grounding & Shielding: Maintain proper cabinet grounding and LocalBus shield continuity throughout the cable chain. The dual left extender must have both connectors properly seated to ensure shield continuity. Improper grounding can introduce ground loops, common mode noise, and communication errors.

Connector Orientation: Verify correct left-side orientation during installation. The KJ4001X1-NB1 is specifically designed for left-side branching; using it in a right-side configuration may result in mechanical interference or connector damage. For right-side branching, use the KJ4001X1-NA1 dual right extender.

Hazardous Area Installation Requirements

Critical safety guidelines for classified locations:

• Installation Documentation: Refer to Document 12P2046 "DeltaV Scalable Process System Zone 2 Installation Instructions" and "Installing Your DeltaV Automation System" manual
• De-Energized Installation: Extender cables MUST NOT be inserted or removed while system power is energized unless area is verified non-hazardous
• Power Isolation: Disconnect LocalBus power and verify zero energy state before cable installation or removal in classified areas
• Hot Work Permits: Obtain appropriate permits before performing any installation work in hazardous areas, even if system is de-energized
• Conduit Requirements: Inter-enclosure cables require rigid or flexible conduit rated for the area classification and environmental conditions

Environmental Specifications

KJ4001X1 Series Extender Options

System Design Considerations

Critical planning factors for successful DeltaV I/O expansion:

• Cable Length Calculation: Measure actual carrier widths and extender cable lengths to verify total system length ≤6.5m before installation
• Power Budget Analysis: Sum all I/O module current draws (from module datasheets) to ensure total ≤8A for dual left extender
• Future Expansion: Reserve 20-30% power budget margin for future I/O additions without requiring LocalBus power supply upgrades
• Redundancy Planning: For critical applications, consider redundant LocalBus paths or spare extender cables for rapid fault recovery
• Documentation: Maintain as-built drawings showing extender cable routing, connector assignments, and power budget calculations

Why Choose Industrial Control Hub?

Your specialized source for genuine Emerson DeltaV automation components:

• ✓ 100% authentic OEM products with full manufacturer traceability and warranty
• ✓ Expert DCS technical support from certified automation engineers
• ✓ Extensive inventory of current production and legacy DeltaV interconnect cables
• ✓ Expedited global shipping to US, UK, EU, and Asia-Pacific markets
• ✓ Competitive pricing with volume discounts for project quantities
• ✓ Complete documentation, installation drawings, and system design assistance

Complementary DeltaV LocalBus Components

Ordering Information & System Planning

• KJ4001X1-NB1: Horizontal LocalBus Dual Left Cable Extender (this product)
• Alternate Part Number: 12P3368X012 (same product, different designation)
• Companion Product: KJ4001X1-NA1 for dual right-side branching applications
• System Planning: Calculate total carrier dimensions + cable lengths to ensure ≤6.5m total system length
• Power Budget: Verify total I/O module consumption remains within 12VDC @ 8A LocalBus capacity

Technical Documentation & Support

Complete installation manuals including Document 12P2046 (Zone 2 Installation Instructions) and "Installing Your DeltaV Automation System" available upon request. Our application engineering team provides system architecture consultation, LocalBus length calculations, power budget analysis, and cabinet layout design assistance for complex DeltaV expansions.

Maintenance & Service Life

• No User-Serviceable Parts: Factory-assembled cable with sealed dual connectors requires no field maintenance
• No Calibration Required: Digital communication protocol eliminates drift and calibration requirements
• Do Not Disassemble: Connector disassembly voids warranty and may compromise signal integrity or power delivery
• Replacement Criteria: Replace if physical damage, connector wear, communication errors, or power delivery issues occur
• Spare Parts Strategy: Maintain spare extender cables for critical applications to minimize downtime during fault recovery

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