Emerson KJ4001X1-NA1 DeltaV Dual Right Local Bus Extender Module

1. Product Overview

The KJ4001X1-NA1 (alternate part number: 12P3373X012) is a professional Local Bus extender module developed exclusively for Emerson DeltaV distributed control systems. Unlike conventional signal acquisition or output I/O cards, this hardware serves as a core network extension and power expansion component, responsible for extending system Local Bus communication distance and expanding multi-rack I/O networking capacity. Featuring dual right-side extension ports and stable bus power output capability, it supports distributed cabinet deployment and long-distance I/O frame expansion. It is widely used in large-scale process automation projects that require multi-cabinet cascading and decentralized control layout, effectively improving the flexibility and scalability of DeltaV system architecture.

2. Core Product Features

1. Dual Independent Right-Side Bus Extension Ports Equipped with dual-channel Local Bus extended interfaces, the module supports simultaneous cascading of two sets of secondary I/O racks. The dual-port design breaks the limitation of single-bus expansion, allowing flexible grouping of on-site distributed I/O cabinets. It realizes independent data transmission and power supply for multiple extended racks without signal congestion or bus load overload, ensuring orderly and stable networking of large-scale I/O systems.

2. High-Capacity Local Bus Power Expansion Built-in high-power bus drive circuit provides stable 12VDC bus power output with up to 8A load capacity. It can independently supply power for multiple extended I/O racks and various functional modules, solving the problem of insufficient power load and unstable voltage caused by long-distance cascading. The constant voltage output design avoids system communication failure caused by power attenuation in multi-stage extension scenarios.

3. Long-Distance Distributed Networking Support Optimized bus signal amplification and anti-attenuation technology effectively extends the transmission distance of DeltaV Local Bus. It adapts to cross-region cabinet layout and decentralized I/O deployment in large workshops, realizing unified control and data interaction between the main control cabinet and multiple remote sub-cabinets. It greatly improves the spatial layout flexibility of the entire automation system.

4. Industrial Anti-Interference & Stable Bus Transmission Adopting professional bus signal shielding and error correction mechanism, the module resists electromagnetic interference from on-site high-power equipment. It ensures high-speed and error-free data transmission during multi-rack cascading operation, avoids data packet loss and communication delay, and maintains the real-time synchronization of the entire DeltaV control network.

5. Lightweight & Standardized Modular Installation With compact structure and ultra-light design, the module occupies a single standard slot and supports standard DeltaV horizontal rail installation. It features simple wiring and convenient cascading deployment, suitable for new system construction and old system expansion and renovation, greatly reducing on-site construction difficulty.

3. Technical Specifications

• Model: KJ4001X1-NA1

• Alternative Part Number: 12P3373X012

• Product Type: DeltaV Local Bus Dual Right Extender Module

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

• Bus Operating Voltage: 12VDC

• Maximum Load Current: 8A high-capacity bus output

• Rated Power Consumption: ≤ 10W

• Networking Mode: Multi-rack cascading, distributed I/O extension

• Installation Type: Standard horizontal DeltaV rail mounting

• Operating Temperature: -40℃ ~ +70℃

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

• Environmental Grade: ISA G3 airborne contaminant resistance

• Vibration & Shock: Industrial standard vibration and impact resistance

• Protection Grade: IP20 (indoor cabinet installation)

• Net Weight: 0.18kg

• Applicable System: Full series Emerson DeltaV DCS systems

• Certifications: CE, UL industrial safety certified

4. Industrial Application Scenarios

1. Multi-cabinet cascading and distributed I/O networking for large petrochemical integrated process plants

2. Long-distance bus extension and sub-rack expansion for oil and gas field station cluster control systems

3. Multi-group I/O frame expansion and bus power distribution for thermal power plant DCS large-scale control systems

4. Decentralized cabinet layout adaptation for ultra-large industrial wastewater treatment and environmental protection automation projects

5. Capacity expansion and network architecture upgrading for old DeltaV systems with insufficient local bus load and limited cabinet space