ABB LXN1604-6 3BHL000986P7000 is an AC-DC power conversion module of the LXN series. Compatible with the UNITROL 1000 excitation system and System 800xA distributed control architecture, it adopts a switching power supply topology to realize AC-to-DC power conversion. It delivers a rated DC output of 27V with a total power rating of 500W, and is specially designed to supply steady and continuous DC power to cabinet-mounted controllers, I/O modules, excitation boards, as well as field sensors and actuators.

The LXN1604-6 3BHL000986P7000 features wide-range mains input and an integrated multi-layer circuit protection structure. It is designed for clip-on mounting on standard 35mm DIN rails with an overall IP20 protection rating. Capable of continuous long-term operation in industrial sites with heavy dust exposure and severe voltage fluctuations, it serves as the core power supply unit within complete control cabinets for power generation, metallurgy and chemical industries.

Product Features

1. Electrical Specifications AC input: 85~264 V, 50/60 Hz; DC input: 90~350 V DC Rated output: 27 V DC, maximum output current 18.5 A, total rated power 500 W Output voltage accuracy: ±1%; Ripple & noise ≤ 100 mVp-p
2. Environmental Adaptability Continuous operating temperature: -25 °C ~ +70 °C; Storage temperature: -40 °C ~ +85 °C Operating relative humidity: 5% ~ 95%, non-condensing Suitable for industrial sites with altitude ≤ 2000 m
3. Mounting Structure Clip-on mounting for standard 35 mm DIN rails with spring latches, tool-free installation and removal Screw-clamp terminals, compatible with multi-stranded cables of 0.75~4 mm² cross-section
4. Safety & Insulation Dielectric withstand voltage between power circuit and signal circuit: 3 kV / 1 min; Insulation resistance ≥ 100 MΩ IP20 overall protection rating; for indoor sealed control cabinet installation only
5. Communication & Diagnostics Reserved passive dry contact for fault alarm, which can be connected to system SCADA to collect power supply fault signals No built-in active communication protocols; only passive hardware status feedback
6. Durability Index Mean Time Between Failures (MTBF) ≥ 50,000 hours, supporting 24/7 year-round continuous operation

Product Advantages

Wide-Range Grid Compatibility

It supports dual input modes of 85~264 V AC and 90~350 V DC, covering mainstream industrial grid voltage ranges worldwide. No extra voltage regulation accessories are required for scenarios with on-site voltage fluctuations or voltage drops from long-distance power transmission.

High Energy Efficiency & Low Power Loss

The peak energy conversion efficiency reaches 92%, while standby no-load power loss is controlled within 5 W. Long-term continuous operation reduces cabinet heat generation and lowers the load of matched cooling fans.

Full-Spectrum Circuit Protection

Integrated with four independent protection logics: Over-Voltage Protection (OVP), Over-Current Protection (OCP), Short-Circuit Protection (SCP) and Over-Temperature Protection (OTP). Upon fault triggering, the output will be automatically cut off with the fault indicator light retained, preventing damage to the unit and upstream control equipment caused by single-channel load short circuits.

Compact Cabinet Layout

Unit dimensions: 194 mm × 138 mm × 113.6 mm. Its narrow horizontal DIN rail footprint saves 30% installation space in control cabinets compared with split power supply assemblies, ideal for compact complete cabinet designs.

Easy Maintenance & Visual Fault Indication

Multi-status indicator lights are mounted on the front panel to distinguish four types of fault signals: Power Ready, Overload, Overheat and Input Undervoltage. Power supply abnormalities can be quickly located without external testing tools.

Strong Electromagnetic Interference Resistance

Built-in multi-layer shielding and filtering circuits compliant with IEC 61000 industrial EMC standards. The output ripple is stably controlled within 100 mV even in high-interference environments near inverters and high-power contactors.

Product Comparison

1. LXN1202-3 (3BHL000985P6000): Rated 300W with 24V output, designed for small I/O control cabinets. It features weak load capacity without multi-group separate outputs at a lower cost, suitable for small single cabinets. In contrast, LXN1604-6 delivers higher power with multiple independent outputs to support high-power loads of excitation systems.
2. LXN2006-8 (3BHL000987P8000): High-power model rated 800W, 27V with 30A output current, applied to parallel power supply for large multi-cabinet systems. It has a larger footprint and occupies more DIN rail space, which is unnecessary for standard excitation systems. LXN1604-6 serves as the standard matching specification for excitation equipment.
3. LXN1602-4 (3BHL000986P5000): Same 500W power rating with single-channel output and no channel grouping. It fails to cut off multi-channel loads independently and only fits simple cabinets with a single controller. LXN1604-6 adopts four grouped outputs, so a fault on one channel will not interrupt power supply to other circuits.

Matching Accessories & Supporting Products

1. ABB UNITROL 1000 Excitation Controller: Core matching host unit, supplying stable DC power to the excitation regulation mainboard
2. ABB S800 Series AI/DI/DO I/O Modules: DC power supply for analog and digital signal acquisition cards
3. ABB AC800M PM864 Controller: 27V DC power supply component for the main control unit of DCS systems
4. CI854A Profibus Communication Interface Card: Matching power supply for fieldbus communication boards
5. TK801V001 Commissioning Cable: Supporting wiring for system parameter reading and fault diagnosis of the power module
6. 3BSE018144R1 Slot Filler Module: Seals vacant DIN rail slots to maintain the cabinet’s IP20 protection rating
7. Industrial 27V transmitters, solenoid valves and position feedback actuators: Field terminal load devices

FAQ

Q1: When placing an order, should I fill in LXN1604-6 or 3BHL000986P7000? What is the difference between them? 

A1: 3BHL000986P7000 is the global unified material code, which must be filled in for customs declaration, spare part application and warehouse receiving. LXN1604-6 is the general product model only used for technical selection verification. The order code shall be prioritized on purchasing documents to prevent wrong version delivery.

Q2: Can this module directly replace same-power LXN1604 series products with different suffix codes? 

A2: No. The suffix code corresponds to the matched system version. P7000 is only compatible with standard UNITROL 1000. Hardware pin definitions of suffix P5000 and P8000 are incompatible. Direct replacement will cause unstable power supply and excitation fault alarms.

Q3: The overload indicator keeps flashing after the module is powered on. What are the common fault causes? 

A3: 1. Short circuit of cables on downstream output branches; 2. Total power of single-channel load exceeds the bearing limit of the corresponding channel; 3. Aging of internal output filter capacitors; 4. Ambient temperature exceeds 70°C, triggering over-temperature linkage overload alarm. Disconnect loads one by one for troubleshooting to locate the fault.

Q4: What is the maximum quantity of S800 I/O modules that a single LXN1604-6 can drive? 

A4: The average power consumption of one I/O card is 12W. The total rated power of the module is 500W, among which 300W is reserved for the excitation mainboard. The remaining 200W can support up to 16 S800 series I/O modules. If more modules are required, a second power supply module shall be installed in parallel.

Q5: What inspections are required before installation if the module has been stored for more than 2 years without use? 

A5: Internal capacitors will degrade after storage exceeding 2 years. Power on the module under no-load condition for 2 hours to activate capacitors before installation. Connect loads only after the multimeter measures a stable 27V output voltage. In addition, check whether metal contacts of input terminals are oxidized or corroded.

Q6: Can the module operate normally if the on-site grid AC voltage stays below 90V for a long time? 

A6: The minimum applicable AC input of this module is 85V. Sustained voltage below 90V will trigger input undervoltage alarm and DC output drop. A voltage stabilizer shall be installed at the front end to stabilize the grid voltage within the standard range.

Recommended Models of the Same Series

1. LXN1202-3 (3BHL000985P6000) – 300W AC-DC Power Conversion Module
2. LXN2006-8 (3BHL000987P8000) – 800W AC-DC Power Conversion Module
3. LXN1602-4 (3BHL000986P5000) – 500W Single-Output Power Module
4. LXN0801-2 (3BHL000984P3000) – 180W Compact DIN Rail Power Module
5. LXN2508-9 (3BHL000988P9000) – 1000W High-Power Conversion Module
6. LXN1604-5 (3BHL000986P6500) – 500W Power Module with 24V Output
7. LXN1003-3 (3BHL000984P5000) – 250W Multi-Output Power Supply Module
8. LXN3010-10 (3BHL000989P10000) – 1500W Power Supply Module for Excitation Systems
9. LXN0601-1 (3BHL000983P2000) – 120W Compact Conversion Module
10. LXN1805-7 (3BHL000987P6000) – 600W Multi-Channel Power Module
11. LXN1403-4 (3BHL000985P8000) – 400W Control Cabinet Power Supply Module
12. LXN2207-8 (3BHL000988P7000) – 750W DC Output Conversion Module
13. LXN0902-2 (3BHL000984P4000) – 200W Dedicated Power Module for Instruments
14. LXN1604-6G (3BHL000986P7500) – 500W Wide-Temperature Optimized Version Power Module