Emerson KJ4001X1-NB1 DeltaV Dual Left Local Bus Extender Module

1. Product Overview

The KJ4001X1-NB1 is a dedicated left-side Local Bus extender module built for Emerson DeltaV distributed control systems. As a core bus expansion hardware complementary to right-side extender units, this model features dual left-oriented extension interfaces to expand Local Bus communication and power networks toward the left side of the main rack. It supports long-distance signal transmission and remote I/O rack cascading, delivering stable 8A bus power supply for extended field devices. Designed for flexible left-direction cabinet expansion and decentralized I/O layout, it solves wiring distance limitations and power shortage issues in complex DeltaV system architectures, serving as an essential expansion component for large-scale process automation control cabinets.

2. Core Product Features

1. Dual Left-Side Independent Bus Interfaces Equipped with dual exclusive left-side Local Bus ports, the module enables two-way left-direction cascading for multiple remote I/O racks. This unique left expansion design complements traditional right-side bus extension, realizing full-dimensional multi-rack networking for DeltaV systems. Each interface operates independently without bandwidth conflict or power mutual interference, ensuring stable parallel operation of multiple extended sub-systems.

2. 8A High-Power Local Bus Output Capacity Integrated high-load bus drive circuit provides up to 8A continuous output current, sufficiently supporting power supply and signal transmission for multi-group cascaded I/O frames, terminal displays and on-site auxiliary bus devices. It eliminates voltage drop and insufficient load capacity caused by long-distance bus extension, maintaining consistent power quality for remote I/O modules.

3. 300-Meter Long-Distance Bus Transmission Adopting professional signal amplification and anti-attenuation technology, the module extends the effective LocalBus transmission distance up to 300 meters. It perfectly adapts to scattered field I/O deployment in large workshops, realizing seamless data communication and power synchronization between the main control rack and distant sub-cabinets without additional signal repeaters.

4. Enhanced Industrial Anti-Interference Performance Built-in multi-layer shielding and data error correction mechanisms effectively resist on-site electromagnetic interference from inverters, large motors and high-power electrical equipment. It ensures low-latency, error-free data transmission during long-distance cascaded operation, stabilizing the real-time data interaction of the entire DeltaV control network.

5. Flexible System Layout & Easy Deployment Standard single-slot modular design supports universal DeltaV rail installation. The left-side expansion mode optimizes cabinet internal wiring layout, suitable for irregular cabinet arrangement and multi-directional system expansion. It matches perfectly with various DeltaV I/O modules and bus equipment for new project construction and old system renovation.

3. Technical Specifications

• Model: KJ4001X1-NB1

• Product Type: DeltaV Dual Left Local Bus Extender Module

• Bus Interface: Dual independent left-side Local Bus extension ports

• Bus Operating Voltage: 12VDC

• Max Output Load Current: 8A high-capacity bus power output

• Maximum Extension Distance: Up to 300 meters LocalBus transmission

• Applicable Devices: Remote I/O racks, field terminals, bus auxiliary equipment

• Installation Method: Standard DeltaV horizontal rail mounting

• Operating Temperature: -40℃ ~ +70℃

• Working Humidity: 5%~95% RH, Non-condensing

• Environmental Standard: ISA G3 airborne contaminant resistance

• Vibration & Shock Resistance: Industrial grade mechanical adaptability

• Protection Grade: IP20 (indoor cabinet installation)

• Compatible System: Full series Emerson DeltaV DCS systems

• Certifications: CE, UL industrial safety certified

4. Industrial Application Scenarios

1. Left-direction multi-rack cascading and long-distance I/O expansion for large petrochemical DeltaV control systems

2. Remote bus extension and decentralized cabinet layout for oil & gas field distributed control stations

3. Multi-directional network expansion and bus power supplementation for thermal power plant DCS large-scale I/O systems

4. Long-distance signal transmission adaptation for ultra-large environmental protection and water treatment automation projects

5. Multi-dimensional bus architecture optimization and capacity upgrading for old DeltaV systems with single-direction expansion limitations