ABB RLM01 3BDZ000398R1 PROFIBUS Redundancy Link Module

Technical Specifications

• Product Type: PROFIBUS DP/FMS Redundancy Link Module
• Product Series: RLM01
• Communication Ports: 3 x PROFIBUS DP ports (9-pin Sub-D, RS-485 interface)
• Transmission Rates: 9.6 Kbps to 12 Mbps (auto-baud detection)
• Maximum Client Connections: Supports up to 31 PROFIBUS DP clients
• Signal Function: Signal amplification, regeneration, and integrity monitoring
• Isolation: Functional galvanic isolation (500 V eff test voltage, VDE 0110 compliant)
• Power Supply: 24 V DC (operating range: +20 V to +33 V DC)
• Power Consumption: Typical 150 mA at 24 V DC
• Dimensions: 134 mm (Length) × 56 mm (Width) × 70 mm (Depth)
• Weight: Approximately 0.33 kg
• Operating Temperature: -25°C to +70°C
• Storage Temperature: -40°C to +85°C
• Humidity Range: 5%–95% RH (non-condensing)
• Vibration Resistance: 5–150 Hz, 0.1 g acceleration
• Shock Resistance: 10 g acceleration (11 ms duration)
• Protection Class: IP20 (suitable for cabinet installation)
• Mounting: 35 mm DIN rail (DIN EN 50022 standard)
• Diagnostics Interface: 8-pin terminal strip for detailed diagnostic data access
• Status Indicators: Front-panel LED indicators for line status and fault signaling
• Certifications: CE, UL 508, CSA, ATEX Zone 2/22, Germanischer Lloyd (marine)
• Standards Compliance: IEC 61010-1, EN 50170, PROFIBUS DP V1

Functional Features

Advanced PROFIBUS Redundancy

• Dual-Line Redundancy Conversion: Converts a single PROFIBUS DP line into two redundant physical lines, creating an active failover mechanism. If the primary line fails, the module automatically and seamlessly switches to the backup line within milliseconds, ensuring zero communication interruption.
• Transparent Network Operation: Functions as a transparent device within the PROFIBUS network, requiring no slave address configuration or changes to existing network parameters. This preserves the original network architecture and reduces integration complexity.
• Real-Time Line Monitoring: Continuously monitors the signal quality, activity, and error status of all three connected lines (primary, redundant, and master). It detects cable breaks, short circuits, signal interference, and device faults instantly.

High-Performance Signal Processing

• Signal Amplification & Regeneration: Acts as an active signal repeater, restoring and amplifying the waveform and amplitude of PROFIBUS data signals. This extends the maximum usable cable length and maintains high signal integrity across long-distance network segments.
• Wide Baud Rate Support: Automatically detects and supports all standard PROFIBUS transmission speeds from 9.6 Kbps up to 12 Mbps, ensuring compatibility with legacy and modern field devices.
• Minimal Communication Delay: Features ultra-low data propagation latency (A/B to M: 11 Bit times + 0.6 μs; M to A/B: 4 Bit times + 0.6 μs), preserving the real-time performance critical for industrial process control.

Comprehensive Diagnostics & Status Management

• Visual Status Feedback: Equipped with bright front-panel LEDs to indicate the operational status of each line (normal, fault, active) and general module health.
• Remote Diagnostic Access: Provides an 8-pin terminal strip for accessing detailed diagnostic messages, including specific line errors, signal quality metrics, and module internal faults. This enables remote troubleshooting without physical inspection.
• Active Fault Signaling: Integrates a dedicated signaling contact for external alarm systems, triggering immediate alerts upon detecting any communication anomaly or hardware failure.

Industrial-Grade Robustness & Durability

• Harsh Environment Operation: Designed to withstand extreme industrial conditions, including wide temperature fluctuations, high humidity, vibration, and electrical noise. It maintains stable performance in heavy industrial settings.
• Electromagnetic Compatibility: Fully compliant with IEC 61000-4 EMC standards, providing superior resistance to electromagnetic interference (EMI) and electrical surges common in industrial plants.
• Hot-Swappable Design: Supports online replacement and maintenance. The module can be installed or removed without powering down the entire network, minimizing system downtime during servicing.

Broad System Compatibility

• Multi-Vendor Device Support: Fully compatible with all standard PROFIBUS DP devices, including PLCs (ABB AC500/AC800M, Siemens S7-300/400), variable frequency drives, remote I/O modules, and field instruments.
• Seamless System Integration: Integrates flawlessly into ABB 800xA DCS, AC800M, and Compact800 control systems, as well as third-party SCADA and automation platforms.
• Marine & Hazardous Area Approval: Certified by Germanischer Lloyd for marine applications and ATEX for use in Zone 2/22 hazardous areas, expanding its deployment versatility.

Application Scenarios

Oil & Gas, Petrochemical & Chemical Industries

• Critical Process Control Networks: Establishes redundant communication for DCS and PLC systems in refineries, chemical plants, and offshore platforms, ensuring continuous control of pumps, valves, and reactors.
• Safety Instrumented Systems (SIS): Provides reliable communication paths for emergency shutdown (ESD) systems and fire/gas detection networks, where uninterrupted data links are essential for personnel and plant safety.
• Remote Wellhead & Pipeline Monitoring: Maintains robust communication over long-distance PROFIBUS lines for upstream oil field operations and pipeline monitoring systems.

Power Generation & Distribution

• Power Plant Automation: Connects redundant field devices in boiler, turbine, and generator control systems, ensuring stable operation in thermal, hydro, and combined-cycle power plants.
• Substation Automation: Supports fault-tolerant communication for protection relays, switchgear, and SCADA systems in high-voltage distribution substations.
• Renewable Energy Systems: Ensures reliable data transmission in wind farms and solar power plants, connecting turbine controllers and inverter systems to central control rooms.

Manufacturing & Discrete Automation

• Automated Assembly Lines: Provides redundant communication for PLCs, robots, and conveyor systems in automotive, electronics, and packaging production lines.
• Material Handling Systems: Ensures uninterrupted operation of high-throughput warehouses, sorting facilities, and logistics automation equipment.
• Machine Tools & Heavy Machinery: Delivers stable PROFIBUS connectivity for CNC machines, presses, and industrial robots, preventing production halts due to communication failures.

Mining & Metals Processing

• Mineral Processing Plants: Operates reliably in high-dust, high-vibration environments for control systems in crushing, grinding, and material handling operations.
• Conveyor & Hoist Control: Maintains communication redundancy for long-distance conveyor belts and mine hoists, critical for continuous ore transportation.

Marine & Offshore Applications

• Shipboard Automation Systems: Certified for marine use, providing redundant networks for propulsion control, auxiliary systems, and navigation equipment on commercial vessels and offshore rigs.
• Offshore Platform Control: Resists salt spray, corrosion, and extreme humidity while maintaining fault-tolerant communication for topside processing and subsea equipment control.

Water & Wastewater Treatment

• Treatment Plant Control Networks: Ensures reliable communication for pump stations, filter systems, and water quality monitoring equipment in municipal and industrial water treatment facilities.
• Long-Distance Pipeline Control: Extends and secures PROFIBUS communication for water distribution and wastewater collection networks.