1. Product Overview

ABB LXN1604-6, material code 3BHL000986P7000, is a heavy-duty DIN rail redundant switching power supply under ABB Convert Select series, specially matched with ABB Ability System 800xA, AC800M DCS, PCS6000 medium voltage drives and UNITROL excitation cabinets. Rated output: 24.7VDC, 20A, total 500W power, dual redundant input (AC 85–264V / DC 90–350VDC). Its core highlight is complete multi-layer hardware protection system, including overvoltage (OVP), overcurrent (OCP), automatic recovery short-circuit protection, plus over-temperature shutdown, input undervoltage lockout and multi-stage EMC surge filtering, fully safeguarding high-value controllers, Ethernet switches, safety relays and I/O modules from electrical faults. All units we supply are brand-new sealed original ABB goods with complete factory test reports, abundant spot inventory for urgent maintenance and bulk EPC procurement worldwide.

2. Core Technical Specifications (Focus on Protection Functions)

表格

Parameter Item	Standard Specification
Full Part Number	LXN1604-6 / 3BHL000986P7000
Rated Output	24.7VDC, 20A, 500W
Dual Redundant Input	AC 85–264V; DC 90–350VDC dual isolated channels
Key Built-In Protection Suite	OVP Over Voltage, OCP Over Current, Hiccup Mode Short Circuit Auto-Recovery, OTP Over Temperature, Input UVP Under Voltage Lockout, EMC Surge Suppression
Short Circuit Protection Mode	Hiccup auto-recovery (cycle limit output, auto restore after fault cleared, no permanent burnout)
Overvoltage Protection Trigger	Output voltage over threshold, immediately shut down output to avoid damaging backend 24V automation hardware
Overcurrent Protection Mechanism	Current limiting + delayed shutdown under overload, prevent power supply and load circuit overheating damage
Operating Temperature	-20℃ ~ +70℃ continuous operation (derating above 55℃)
PCB Treatment	Full conformal anti-corrosion coating, anti-humidity & chemical vapor
Mounting	Standard 35mm DIN rail metal finned housing, IP20 cabinet internal use
Status Indicators	Power OK green LED, dual input fault alarm LED, fault visible at a glance
Certifications	CE, UL, IEC61010 industrial safety standard, full protection circuit certified
Dimension & Weight	194 × 113.6 × 138 mm, ~2.8kg

3. Detailed Introduction of Core Protection Functions

3.1 OVP Over Voltage Protection

When abnormal grid surge, internal circuit failure or load feedback causes output voltage to exceed safety threshold, the module instantly cuts off DC output to block high voltage from flowing into AC800M CPU, NE800 Ethernet switches, RB520 safety relays and precision transmitters. Effectively avoid chip breakdown, display burnout and permanent scrapping of expensive automation equipment caused by overvoltage impact.

3.2 OCP Over Current Protection

Two-stage overcurrent limiting design:

1. Light overload: Constant current limiting, stabilize output current within safe range to avoid instantaneous overload trip;
2. Severe long-time overload: Trigger delayed shutdown to stop continuous overcurrent heating of power supply internal transformers and backend wiring. Suitable for industrial load surge scenarios such as robot startup, valve cluster simultaneous action and I/O module batch power-on.

3.3 Hiccup Mode Short Circuit Protection (Core Advantage)

Adopt industry-standard hiccup cyclic recovery short-circuit protection, different from one-time lockout of ordinary power supplies:

• When output wiring short-circuit, sensor cable short or module internal short occurs, the power supply repeatedly cuts off and tries low-current output in cycles to limit short-circuit current;
• Once the short-circuit fault is removed, the module automatically resumes normal output without manual power cycle reset;
• No fuse burnout, no permanent power module damage, greatly reduce maintenance downtime for factory cabinet wiring faults.

3.4 Supplementary Full-Range Auxiliary Protection

1. OTP Over Temperature Protection: When cabinet ventilation is poor and internal temperature exceeds limit, thermal shutdown activates to prevent power supply burnout and chain fire risk;
2. UVP Input Under Voltage Lockout: If mains voltage drops sharply, block unstable low voltage output to avoid controller crash and communication disconnection;
3. Multi-Stage EMC Surge Filter: Absorb grid instantaneous surge and drive harmonic interference, prevent protection mis-trigger caused by industrial electromagnetic noise;
4. Dual Input Independent Fault Alarm LED: Real-time identify which redundant input channel fails, convenient rapid troubleshooting without complex testing instruments.

4. Value of Complete Protection System for Industrial Automation

1. Avoid Massive Loss of High-Value Control Hardware ABB 800xA controllers, industrial Ethernet switches and safety instruments are high-cost core equipment. Overvoltage, short-circuit and overcurrent faults are the main causes of permanent module damage. LXN1604-6 integrated full protection forms an electrical safety barrier between power grid and automation hardware, drastically reduce spare parts replacement cost.
2. Minimize Unplanned Production Downtime Hiccup short-circuit auto-recovery eliminates the need to cut cabinet power for reset after wiring faults; dual input redundancy plus multi-layer protection avoid system wide trip caused by single electrical fault, critical for non-stop production lines in chemical, semiconductor, automotive and power plant industries.
3. Adapt to Complex Harsh Industrial Electrical Environments Factory grid voltage fluctuation, drive harmonic interference, humid cabinet wiring leakage and accidental cable short-circuit are common on-site risks. The complete protection system ensures stable power supply output without misoperation in harsh workshop conditions, lower hidden safety hazards of DCS and SIS safety systems.
4. Extend Overall Service Life of Automation Cabinet Hardware Effectively suppress voltage surge and overcurrent impact, reduce long-term electrical fatigue aging of CPU, communication chips and relay contacts, extend the whole cabinet automation equipment service cycle and cut long-term operation & maintenance expenses.

5. Main Application Scenarios

1. Power Plant DCS & Excitation Cabinets: Protect AC800M redundant controllers, CEX-bus BC810 interconnection units and UNITROL excitation boards
2. Chemical SIS Safety Instrumented Systems: Guard safety relays, explosion-proof transmitters and core Ethernet switches against short-circuit/overvoltage faults
3. Semiconductor Wafer Fab Cleanroom Control Racks: Prevent precision measurement sensors and wafer robot control boards from electrical damage
4. Automotive Welding & Assembly Production Lines: Resist welding arc surge, protect robot control cabinets and safety interlock modules
5. Metallurgy PCS6000 Medium Voltage Drive Auxiliary Cabinets: Stabilize power supply for drive control boards under heavy load current shock

6. Original In-Stock & Global Shipping Support

All ABB LXN1604-6 / 3BHL000986P7000 power modules we deliver are 100% genuine original factory products, with sealed original cartons, full performance protection test certificates, covered by formal 12-month manufacturer warranty for manufacturing defects under rated operating conditions. Our warehouse maintains permanent abundant spot stock to support urgent cabinet maintenance orders and large-scale global EPC project bulk procurement. We use anti-static, shockproof and moisture-proof dedicated export packaging to protect internal circuit boards during long-distance sea and air transportation, cooperate with DHL/Fedex/UPS to realize fast door-to-door delivery worldwide, supporting one-stop customs clearance for Europe, North America, Southeast Asia, Middle East and all major industrial regions.
Our full supporting services include pre-sales cabinet load calculation, redundant power topology design, protection function parameter consultation, after-sales DIN rail installation, fault protection test debugging and complete ABB 800xA automation system overall commissioning.

Product Summary

Genuine ABB LXN1604-6 industrial power module integrates complete overvoltage, overcurrent and hiccup auto-recovery short-circuit protection, paired with redundant dual input and wide temperature anti-corrosion design. It provides all-round electrical safety protection for ABB System 800xA full series automation hardware, effectively avoid expensive equipment burnout and unplanned production shutdown caused by power faults. Supported by ample spot stock, efficient global logistics and complete original warranty, it is the standard safety power spare component for all ABB industrial process automation control cabinet projects.