1. Core Product Identity

• Model: LXN1604-6
• Part No.: 3BHL000986P7000
• Brand: Original ABB / Hitachi Energy
• Positioning: Dual-function unit – CEX-Bus real-time deterministic communication switch + integrated industrial power supply, dedicated to ABB AC 800M & System 800xA DCS platformsABB
• Bus Standard: CEX-Bus (Cyclic Extended Bus) – ABB proprietary high-speed internal expansion bus for controller communication extension, mandatory for real-time cyclic process data exchangeABB

2. CEX-Bus Deterministic Real-Time Core Features

2.1 Deterministic Communication Performance

1. Hard real-time cyclic transmission, fixed sub-millisecond latency, zero jitter for closed-loop process control
2. Hardware-layer scheduling for CEX-Bus traffic, independent of CPU scan cycle, guarantees synchronous I/O & drive data refresh
3. Supports redundant CEX-Bus topology, hot-swap without system downtime, fault isolation per bus segment
4. Built-in traffic shaping & priority queue: critical control commands (valve, drive interlock) transmit prior to background diagnostic data

2.2 CEX-Bus Interface Capacity

• Native CEX-Bus backplane slot connection for AC800M PM8xx series controllers
• Expands controller communication ports via CEX-Bus: 4× galvanically isolated Gigabit Ethernet RJ45 ports (10/100/1000M)
• Compatible with CEX-Bus extension cables (TK850 series) & interconnection units (BC810/BC820K01) for cabinet distributed layout
• Each port supports Modbus TCP, PROFINET IO, EtherNet/IP for field drives, analyzers, remote S800 I/O stations

2.3 Network Diagnosis & Fault Protection

• Real-time CEX-Bus link status monitoring, port error counter, cable break & device offline automatic alarm
• Port-level overvoltage, overcurrent, short-circuit protection for Ethernet field wiring
• Full fault logging synchronized to System 800xA HMI for one-click troubleshooting

3. Integrated Industrial Power Module Specs (Built-In Power Rail for CEX-Bus Backplane)

• Universal AC Input: 85–264 VAC 50/60Hz; DC backup 90–350 VDC
• Rated Output: 24 VDC stabilized power for CEX-Bus communication cards & field transceivers
• Triple power protection: Over Voltage (OVP) / Over Current (OCP) / Short Circuit Auto Recovery (SCP)
• Thermal shutdown protection, high efficiency ≥90%, low standby power consumption
• 3kV AC reinforced isolation between power input and CEX-Bus signal circuit, anti-surge EMC compliance

4. Mechanical & Environmental Specifications

• Mount: Standard TS35 DIN rail / System 800xA controller backplane direct insertion
• Operating Temp: -25 ℃ ~ +70 ℃ (non-condensing); storage -40 ℃ ~ +85 ℃
• Vibration resistance: 5g @10–150Hz (IEC 60068), conformal coating for humid/chemical factory environments
• Protection class: IP20 cabinet use; Certifications: CE, UL, RoHS, SIL2 capable for safety interlock systems
• MTBF >50,000 hours industrial grade reliability

5. Key Application Scenarios (Real-Time Industrial Control Network)

1. Power industry: Thermal power, hydropower, wind turbine DCS CEX-Bus communication expansion
2. Oil & gas / petrochemical: Refinery real-time drive control, distributed analyzer network
3. Metallurgy: Rolling mill closed-loop speed control with deterministic EtherNet/IP via CEX-Bus
4. Water treatment & pharmaceutical batch process control
5. Intelligent factory Industry 4.0: Synchronized robot & conveyor motion control

6. Original Unit Commercial Advantages

1. 100% Original ABB factory sealed stock, full 12-month global warranty
2. All-in-one design: CEX-Bus deterministic switch + power supply, saves cabinet space
3. Fully compatible with Control Builder M engineering software, one-click network configuration
4. Global fast shipment, spot inventory for urgent DCS cabinet replacement projects

Short B2B Listing Title (Alibaba/Industrial Platform)

ABB LXN1604-6 3BHL000986P7000 Original CEX-bus Deterministic Switch Integrated Industrial Power Module with OVP OCP SCP Protection for ABB System 800xA Real-Time DCS Control Network

Full English Sales Description

Original ABB LXN1604-6 3BHL000986P7000 is an integrated CEX-Bus deterministic communication switch and industrial power module exclusively developed for ABB AC 800M & System 800xA real-time distributed control system. Based on ABB proprietary CEX-Bus cyclic extended bus technology, this unit delivers hard deterministic low-jitter real-time data transmission, which is the core guarantee for high-precision closed-loop process control. It expands controller communication capacity with four galvanically isolated Gigabit Ethernet ports, supporting mainstream industrial Ethernet protocols including Modbus TCP and PROFINET IO to connect inverters, remote I/O and online analyzers. The built-in high-efficiency power supply module provides stable 24VDC power for the entire CEX-Bus backplane, equipped with complete over voltage, over current and auto-recovery short-circuit protection to avoid communication card burnout caused by field wiring faults. Redundant CEX-Bus support and hot-swap design ensure uninterrupted plant operation. Manufactured with industrial rugged design, wide temperature range and anti-vibration coating, it performs stably in power, petrochemical, metallurgy and intelligent manufacturing harsh workshops. We supply brand new original units with 12-month quality warranty and worldwide fast delivery, widely used in real-time industrial control network reconstruction and new DCS cabinet projects.