ABB Industrial Power Supply LXN1604‑6 3BHL000986P7000 Redundant Input

1. Product Overview

The ABB LXN1604‑6 (order code 3BHL000986P7000) is a redundant input industrial power supply designed exclusively for ABB System 800xA DCS and AC800M PAC controller racks. This dedicated power unit features redundant AC/DC input design to avoid power loss caused by single grid circuit failure. It converts universal industrial mains power into stable 24.7VDC high-current output, delivering continuous power to rack CPUs, S800 I/O modules, communication boards and safety control hardware via the rack backplane bus. Manufactured by ABB Industrial Automation, the LXN1604‑6 supports 1+1 and N+1 parallel redundant power deployment. Built-in monitoring circuits upload real-time voltage, current and fault data to the 800xA control platform through CEX bus, making it a standard OEM spare part for continuous-process industrial facilities.

2. Technical Specifications

3. Product Features

3.1 Redundant Dual Input Design

Equipped with two independent input terminals for separate power grid access. If one input circuit loses power, the second input takes over instantly without interrupting rack power supply, eliminating single-point power failure risks for critical control systems.

3.2 Exclusive Matching for ABB 800xA AC800M

Native hardware and bus compatibility with all AC800M CPU models, S800 I/O clusters and TK series control racks. Real-time power status data can be viewed and diagnosed via Compact Control Builder engineering software.

3.3 High Efficiency & Low Ripple Output

Over 90% power conversion efficiency with fanless cooling for zero noise. Ultra-low output ripple prevents signal drift of analog I/O modules, ensuring precise field signal collection and closed-loop control.

3.4 Complete Multi-Layer Circuit Protection

Integrated overvoltage, overcurrent, short-circuit, overheat and reverse connection protection. The module automatically cuts off output under abnormal conditions to safeguard expensive AC800M controller boards.

3.5 Modular DIN Rail Plug-and-Play Structure

Standard DIN rail mounting allows fast installation, hot swap in redundant power systems and easy on-site replacement during equipment maintenance without complex cabinet wiring modification.

3.6 Harsh Industrial Environment Adaptability

Wide operating temperature range and built-in EMC shielding resist vibration, dust and electromagnetic interference in power, chemical, metallurgy and other heavy industrial workshops.

4. Structure and Composition

4.1 Physical Structure

DIN rail mounted power supply module for AC800M control cabinets; installed in the dedicated power slot of TK801A and TK811A racks. The front panel contains redundant input terminals, fault alarm terminals and multi-color LED status indicators.

4.2 Main External Hardware Components

1. Dual Redundant Input Terminal Blocks: Two groups of detachable screw terminals for independent mains power access
2. Backplane Power Connector: Transmits regulated 24VDC power to all rack modules
3. Dry Contact Fault Output Terminal: Links to 800xA operator station for remote alarm notification
4. LED Indicator Lights: Green normal power indicator, red fault alarm indicator
5. Large Area Heat Dissipation Grille: Passive cooling structure without built-in cooling fan

4.3 Internal Core Electronic Components

High-frequency switching transformers, isolation inductors, power management ICs, current-sharing circuits for parallel redundancy, surge protection thyristors and precision filter capacitor groups.

5. Application Fields

The ABB LXN1604‑6 3BHL000986P7000 redundant input power supply is widely deployed in industries requiring uninterrupted DCS control:

1. Thermal, hydro, wind and photovoltaic power plants: 800xA control cabinet redundant power supply
2. Petrochemical & chemical plants: Continuous reactor and pipeline monitoring control system
3. Metallurgy & steel mills: Furnace and rolling mill AC800M automation racks
4. Water treatment & environmental protection: Sewage and waste gas monitoring DCS equipment
5. Pharmaceutical & food manufacturing: Batch process sterile workshop control cabinets
6. Mining industry: Central control room uninterrupted power system
7. Pulp and paper production line process automation control

6. Installation and Maintenance Guidelines

6.1 Installation Precautions

1. ESD protection required: Wear anti-static gloves when disassembling and installing the module to avoid static damage to internal chips.
2. Dual input wiring rules: Connect two independent power sources to the redundant input terminals separately; do not connect both terminals to the same single circuit.
3. Mounting requirement: Secure the module firmly on the DIN rail to prevent loosening caused by equipment vibration.
4. Terminal inspection: Tighten all screw terminals to avoid poor contact leading to voltage drop or false fault alarms.

6.2 Routine Maintenance Guidelines

1. Monthly inspection: Check LED status, clean dust on heat dissipation grilles, and read power load data through 800xA software.
2. Fault diagnosis: Utilize built-in self-test function to quickly locate input circuit, overheat or overload faults.
3. Professional repair service: Aging component replacement, deep cleaning, reflow soldering and full-load aging testing available for refurbished modules.
4. Storage rule: Store spare units in sealed anti-static boxes under dry and constant temperature conditions.

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