ABB LXN1604-6 with part code 3BHL000986P7000 is an all-in-one DIN rail combined hardware integrating a 4-port galvanically isolated Gigabit CEX-bus Ethernet switch and high-efficiency 500W industrial AC-DC power supply, exclusively developed as compact backbone communication & power hub for ABB Ability™ System 800xA distributed control system. Differing from discrete power supply and multi-port standalone switches that waste cabinet DIN rail space, this single slim module integrates power conversion and proprietary CEX-bus real-time switching, perfectly matching small-scale single-controller DCS cabinets, skid-mounted process panels, laboratory pilot equipment and local on-site operation boxes with limited installation space. The built-in 4 dedicated Gigabit RJ45 ports are pre-calibrated for ABB CEX cyclic extended bus, supporting loss-free redundant synchronization between primary/backup AC800M controllers, S800 I/O racks, ACS variable frequency drives and local HMI monitors. We maintain long-term stable spot inventory of factory-sealed brand-new original modules, conduct complete pre-shipment power & communication aging testing, provide same-day packaging and door-to-door global shipping for power, petrochemical, pharmaceutical, metallurgy and water treatment DCS cabinet manufacturing, automation line retrofits and emergency spare part replacement projects worldwide.

Complete Technical Specifications Focused on 4-Port CEX-bus Switch Performance

1. Core 4-Port Gigabit CEX-bus Communication Parameters

The module adopts hardware-accelerated switching chip customized for System 800xA hard real-time control networks, equipped with 4 independent isolated 10/100/1000Mbps auto-sensing RJ45 ports, eliminating redundant idle ports and extra cost compared with 8/16-port industrial switches, ideal for compact single-cabinet control architecture:

• Port isolation: Each port built-in 2.5kV galvanic isolation and independent EMC surge suppression circuit, blocking ground loop noise and high-frequency harmonic interference generated by inverters and servo motors
• Switch fabric: Non-blocking total capacity 12Gbps, packet forwarding rate 8.9Mpps, supports jumbo frames up to 9.6KB for mass process curve data, safety fault logs and batch production record transmission
• Deterministic CEX-bus scheduling: Hardware fixed-cycle forwarding delivers sub-millisecond ultra-low jitter cyclic data mirroring, realizing full synchronization of process variables, safety interlock status and fault timestamps between dual redundant AC800M controllers without packet loss or data offset
• Redundancy protocol: Native RSTP rapid spanning tree, network fault recovery within 20ms; automatic redundant link switchover avoids safety interlock emergency stop caused by communication cable breakage
• Supported industrial protocols: Native CEX-bus, Modbus TCP, PROFINET RT, MMS DCS control protocol, realizing bidirectional real-time data exchange between 800xA engineering workstations, SIS safety logic modules and field analytical transmitters
• Clock synchronization: Embedded IEEE 1588 PTP transparent clock, unifies high-precision timestamps for all 4-port connected field equipment to meet GMP and IEC61511 safety audit traceability requirements
• Per-port diagnosis: Independent LED indicators for link status, data activity and transmission speed; built-in SNMP monitoring uploads single-port packet loss rate, link load and CEX-bus cycle deviation to central HMI with complete timestamped fault records

Standard 4-port allocation scheme for compact DCS cabinets: Port1 for primary AC800M controller CEX sync, Port2 for backup redundant controller mirror link, Port3 for S800 I/O rack communication, Port4 for HMI & drive monitoring connection. Multiple LXN1604-6 modules can be cascaded to construct full redundant ring CEX-bus backbone for multi-reactor batch production control systems.

2. Integrated 500W High-Efficiency DIN Rail 24V DC Power Supply

To fully power the internal 4-port CEX-bus switch and all DCS hardware inside small cabinets, the built-in universal wide-input power unit provides stable regulated DC output:

• Dual universal input: AC 85–264VAC (47–63Hz), DC backup 90–350VDC, compatible with all global industrial mains, UPS and generator backup power without extra voltage transformers
• Rated output: Stabilized 24.7VDC, 20A continuous current, total 500W full power capacity, simultaneously supplying dual redundant AC800M CPUs, slim S800 I/O modules, safety relays, field 4–20mA transmitters and the internal 4-port switching circuit
• Conversion topology: LLC resonant soft-switch design, efficiency ≥90% across 20%–100% load range, ultra-low heat accumulation suitable for poorly ventilated sealed compact DIN rail cabinets
• Output ripple noise: Controlled ≤100mV peak-to-peak, preventing measurement drift of precision pressure transmitters, bioreactor analytical sensors and robot vision equipment
• Reinforced insulation: 3kV AC isolation barrier between power input loop and 4-port Ethernet signal circuits, isolating power-side surge interference from real-time control communication
• Industrial MTBF: Over 50,000 hours under 24/7 full-load continuous DCS unattended operation

3. Multi-Layer Hardware Safety Protection for Power & 4-Port Communication Loops

Full microsecond-level hardware protection architecture safeguards expensive DCS control hardware and 4-port CEX-bus communication channels from all on-site electrical faults:

1. Over Voltage Protection (OVP): Instantly cuts 24V DC output to protect Ethernet transceiver chips and controller mainboards during grid surge voltage impact
2. Overload & Over Current Protection (OCP): Supports long-term stable operation under 120% rated load to withstand instantaneous startup surge of solenoid valves and servo drives; automatic current limiting without permanent module burnout
3. Auto-Recovery Short Circuit Protection (SCP): Rapidly suppress huge short-circuit current triggered by wiring misconnection or cable insulation aging; power and CEX-bus communication automatically resume after fault elimination, no full cabinet power cycle required
4. Over Temperature Thermal Lockout: Real-time internal temperature monitoring, shuts down output to avoid PCB carbonization in densely arranged compact DIN rail layouts
5. Per-port lightning surge filter: Each of the 4 Ethernet ports independent pulse suppression, adapting remote oilfield, mining and water pump stations with unstable power infrastructure

4. DIN Rail Mechanical & Environmental Adaptation Specifications

• Mounting standard: TS35 standard snap-on DIN rail installation, one-click locking and quick disassembly without extra mounting brackets or fixing screws
• Overall dimensions: 194mm depth × 113.6mm height, slim narrow vertical body, saves over 40% DIN rail horizontal space compared with split power + separate switch schemes
• Net weight: Approximately 0.5kg, lightweight structure avoids DIN rail deformation under dense module arrangement inside small cabinets
• PCB surface treatment: Full industrial three-proof conformal coating, passes IEC 60068 anti-vibration and shock testing, resists dust, moisture, oil mist and weak corrosive gas in chemical, metallurgical and pharmaceutical workshops
• Continuous operating temperature range: -25℃ ~ +70℃, maintains stable 4-port CEX-bus high-speed switching and power output without thermal throttling in high-temperature closed cabinets; storage temperature: -40℃ ~ +85℃ for long-term spare part warehouse storage
• Protection grade: IP20 indoor cabinet deployment; global certifications: CE, UL 5085, RoHS, SIL2 functional safety qualification, fully applicable to safety interlock control loops of high-risk process industries
• Hot-swap support: Module replacement without cutting off the entire cabinet main power supply, all 4-port connected DCS equipment keeps normal control operation during maintenance to avoid unplanned production line halt

Core Advantages of 4-Port All-In-One Unit for ABB Ability System 800xA

1. Compact 4-port integrated design drastically reduces cabinet volume and hidden failure points Traditional small DCS cabinet schemes need separate DIN rail power supply and independent managed switch, occupying double TS35 rail length and increasing wiring terminals prone to loose contact faults that trigger power cut-off or CEX-bus communication dropout. LXN1604-6 integrates 500W power conversion and dedicated 4-port CEX-bus switching into a single DIN rail module, simplifying cabinet wiring layout, cutting assembly labor costs, and reducing spare part inventory categories for maintenance teams managing numerous scattered compact 800xA control panels. Parallel N+1 module connection supports redundant power deployment in limited rail space to eliminate single-point power failure risks for critical control loops.
2. Factory pre-calibrated 4-port deterministic CEX-bus perfectly matches 800xA redundant control architecture The four isolated Gigabit ports are specially optimized for the four core link layout of single redundant controller cabinets. Engineers complete one-click CEX-bus ring topology and power parameter configuration via Control Builder M engineering software without secondary program debugging, drastically shortening on-site DCS commissioning and fault replacement recovery time. Hardware-level fixed-cycle CEX-bus forwarding eliminates random jitter of commercial general switches, guaranteeing consistent real-time refresh of safety interlock and process control signals required by pharmaceutical GMP, chemical reactor and power plant safety systems.
3. Low heat, anti-interference design adapts confined sealed cabinet environments Small control cabinets feature poor air circulation and densely arranged electrical components; discrete power supplies and switches generate excessive waste heat and mutual electromagnetic interference, easily triggering over-temperature protection and signal jumping. The module’s high-efficiency LLC soft-switch circuit minimizes heat output, while reinforced isolation and multi-stage EMC filters eliminate cross-interference between power and communication circuits, stabilizing measurement and control signal precision of precision process equipment in narrow cabinet spaces.
4. Reliable original spot stock global supply supports rapid project delivery Refurbished or counterfeit combined power-switch modules adopt inferior switching chips and simplified port isolation circuits, prone to unstable CEX-bus transmission, packet loss and frequent over-temperature trips under long-term full-load operation inside compact cabinets. All LXN1604-6 modules we supply are unmodified factory genuine products with intact 4-port communication and complete power protection circuits, covered by a 12-month global quality warranty. Our professional automation technical team provides free remote guidance for compact cabinet DIN rail layout design, 4-port network wiring planning, DCS load power calculation and CEX-bus communication fault diagnosis after sales service.

Typical Industrial Application Scenarios for 4-Port CEX-bus Switch Integrated Unit

As the standardized compact power and 4-way real-time communication core of ABB Ability System 800xA DCS, ABB LXN1604-6 3BHL000986P7000 is widely applied in all space-limited process automation scenarios requiring 4-channel CEX-bus deterministic control links: single redundant controller compact DCS cabinets for thermal power auxiliary boiler monitoring; small reactor skid-mounted control panels in petrochemical refineries; pharmaceutical bioreactor and sterile filling line mini GMP-compliant DCS panels; single pump/fan automation control boxes for municipal large water treatment plants; metallurgical small auxiliary drive local control panels; offshore oil & gas wellhead compact monitoring DCS frames. Whether for new small cabinet manufacturing, space-saving renovation of old single-link compact DCS control systems, or emergency replacement of faulty combined power-switch modules causing full 4-port control network interruption, original ABB LXN1604-6 4-port Ethernet switch integrated power unit delivers stable, space-saving power and hard real-time CEX-bus communication support for ABB Ability System 800xA industrial DCS control networks.