ABB DDC779BE02 | 3BHE006805R0002 Dual-Channel Profibus DP Redundant Communication Module
Redundant Profibus DP communication module with dual electrical/fiber interfaces, multi-protocol compatibility, and industrial-grade reliability for harsh industrial automation networks
1. Product Overview
The ABB DDC779BE02 (3BHE006805R0002) is a high - performance dual - channel Profibus DP redundant communication module, which is a key component of ABB's industrial automation and distributed control system (DCS) architecture. It is specially designed to provide reliable, redundant data transmission for critical industrial networks, supporting logically independent dual Profibus DP buses, and providing 12 Profibus DP electrical interfaces and 12 155 Mbps fiber - optic interfaces to meet the needs of redundant dual - network and fiber ring - network topology applications. It supports all preset communication rates in the Profibus DP standard, which can be set through DIP switches or rate - adaptive mode, with a fiber - optic communication distance of more than 20 km, ensuring long - distance and stable transmission of burst data. It has a wide - range redundant dual - power supply of 12-36 V DC with reverse connection protection, 5 dual - color LED status indicators, 4000 V lightning protection for electrical interfaces, 1.5 A over - current protection and 600 W surge protection, and complies with EMC test certification. With a working temperature range of - 40°C to +85°C, IP30 protection grade, and industrial - grade aluminum alloy casing, it is very suitable for harsh industrial environments such as power generation, petrochemical, oil & gas, and manufacturing, where high - reliability communication is crucial for ensuring the continuous operation of the system and reducing downtime.
Key Specifications
• Model: DDC779BE02 | 3BHE006805R0002 | ABB Dual-Channel Profibus DP Redundant Communication Module
• Communication Protocols: Dual logically independent Profibus DP buses; Modbus RTU/ASCII; Ethernet TCP/IP
• Interfaces: 12×Profibus DP electrical interfaces (RS - 485); 12×155 Mbps fiber - optic interfaces (multimode/single - mode)
• Communication Rate: 9.6 kbps to 12 Mbps (DIP switch setting/rate adaptation); Fiber - optic Transmission Distance: >20 km
• Redundancy: Redundant dual - network support; fiber ring - network topology; fiber - optic link fault alarm output (DC 48 V/1 A contact)
• Power Supply: 12-36 V DC redundant dual - power supply (24 V DC nominal); Reverse connection protection; Power Consumption: ≤5 W
• Mechanical: 35 mm DIN rail mounting; Wave - patterned aluminum alloy casing; Dimensions: 48×48×110 mm; Net Weight: 0.1 kg
• Environmental: Operating Temperature: - 40°C to +85°C; Storage Temperature: - 40°C to +85°C; Humidity: 5-95% (non - condensing)
• Certifications: CE, RoHS, EMC (IEC 61000 - 6 - 2/6 - 4), Profibus DP compliance
2. Core Features
• Dual - Channel Profibus DP Redundancy: Logically independent dual Profibus DP buses ensure no communication interruption in case of single - channel failure
• Multi - Interface Flexibility: 12 electrical + 12 fiber - optic interfaces support hybrid electrical/fiber - optic network deployment and long - distance transmission
• Rate Adaptability: DIP switch setting or automatic rate adaptation supports all standard Profibus DP communication rates (9.6 kbps - 12 Mbps)
• Industrial - Grade Protection: 4000 V lightning protection, 1.5 A over - current protection, and 600 W surge protection for electrical interfaces to resist harsh industrial EMC interference
• Redundant Power Supply: 12-36 V DC wide - range dual - power input with reverse connection protection ensures stable operation during power fluctuations
• Visual Status Monitoring: 5 dual - color LEDs display power, communication link, fault, and redundancy status in real time
• Fiber - Optic Link Fault Alarm: Independent alarm output contact (DC 48 V/1 A) enables quick fault location and system recovery
• Wide Temperature Range: - 40°C to +85°C operation is suitable for extreme industrial environments such as deserts and cold regions
3. Typical Applications
• Power Generation: Thermal power plant DCS network redundancy; hydropower unit control system communication; nuclear power safety system data transmission
• Petrochemical: Refinery distributed control system (DCS) bus expansion; chemical reactor monitoring network; oil depot safety instrumented system (SIS) communication
• Oil & Gas: Offshore platform process control network; pipeline monitoring system data link; LNG plant Profibus DP redundant ring network
• Manufacturing: Automotive assembly line PLC - DCS communication; paper mill drive control network; steel mill rolling mill Profibus DP redundancy
• Water Treatment: Sewage treatment plant distributed I/O network; water supply system SCADA communication; desalination plant control bus expansion
4. Installation & Maintenance
Installation: Mount on 35 mm DIN rail; connect 12-36 V DC redundant power supply; wire Profibus DP electrical interfaces to field devices; connect fiber - optic interfaces to form a ring network; set communication rate via DIP switches; connect fault alarm output to the monitoring system; power on and test redundancy switching.
Maintenance: Weekly: Check dual - color LED status (Power, Fiber Link, Comms, Fault, Redundancy); Monthly: Verify Profibus DP data transmission and fiber - optic signal quality; Annual: Test redundancy switchover logic and electrical interface surge protection; clean module casing and update firmware.
Safety Notes: Cut off power before installation/removal; use shielded cables for electrical interfaces to reduce interference; ensure fiber - optic connectors are clean and dust - free; confirm redundant power supply polarity to avoid reverse connection damage; replace the module immediately if the Fault LED is always on to maintain communication reliability.
Technical Document | ABB DDC779BE02 3BHE006805R0002 | Dual-Channel Profibus DP Redundant Communication Module for Industrial Automation Networks
