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ABB RLM01 Redundant Link Module  

Product Overview

The ABB RLM01 is a high-performance PROFIBUS redundancy link module designed for critical industrial automation applications. It serves as an active switch that converts between redundant and non-redundant PROFIBUS DP networks, ensuring continuous communication even during network disruptions .

Technical Specifications

General Parameters

• Brand: ABB

• Model: RLM01 (alternative part number: 3BDZ000399R1) 

• Type: PROFIBUS redundancy link module

• Dimensions: 134×56×70 mm (H×W×D) 

• Weight: 330g (0.6kg in some sources) 

• Protection Rating: IP20 

• Mounting: 35mm DIN rail 

Electrical Characteristics

• Operating Voltage: 24VDC (+20..+33V range) 

• Current Consumption: 150mA typical at 24V 

• Power Consumption: Approx. 3.6W 

• Connection: 8-pin terminal strip (0.14-1.5mm² wire) 

Communication Interfaces

• PROFIBUS Ports: 3 (A, B, and M) 

• Connector Type: 9-pin Sub-D 

• Electrical Isolation: 500Veff functional isolation 

• Supported Rates: 9.6Kbps to 12Mbps 

• Maximum Stations: 31 PROFIBUS clients per interface 

Environmental Conditions

• Operating Temperature: 0°C to +50°C 

• Storage Temperature: -30°C to +85°C 

• Humidity: Max 75% non-condensing 

Certifications

• Safety: CE, UL, CSA 

• Marine: Germanischer Lloyd (Categories A-D) 

Functional Features

1. Redundancy Conversion:

   • Converts single PROFIBUS DP to redundant dual links (A/B) and vice versa 

   • Transparent operation without register byte limitations 

2. Signal Processing:

   • Amplifies signal shape and amplitude 

   • Includes repeater functionality 

3. Monitoring & Diagnostics:

   • Real-time monitoring of all three links (A, B, M) 

   • Front-panel LED indicators for status/errors 

   • Potential-free alarm contact (max 1A @ 60VDC) 

4. Power Management:

   • Supports redundant 24VDC power inputs 

   • Automatic switchover during power failure 

5. System Compatibility:

   • Works with ABB AC800M PM865/PM856 systems 

   • Compatible with non-ABB systems (e.g., Siemens) 

Application Scenarios

Typical Use Cases

1. Process Industries: Oil & gas refineries, chemical plants 

2. Power Systems: Generation and distribution networks 

3. Water Treatment: Plant automation systems 

4. Manufacturing: Production line control 

5. Transportation: Rail signaling systems 

Configuration Examples

• Connecting non-redundant AC800F FI830F to redundant DP network 

• Integrating single-DP devices (e.g., drives) into redundant systems 

• Creating mixed networks with both redundant and non-redundant segments 

Installation and Operation Notes

Wiring Guidelines

• Use shielded PROFIBUS cables with single-end grounding 

• Maintain separation between communication and power cables 

• For outdoor runs, use fiber optic media converters 

Power Considerations

• External protection (fuses 1.6A-10A) recommended per UL/CSA 

• Ensure proper ventilation for heat dissipation 

Maintenance

• Monitor LED indicators for fault detection 

• Regularly check terminal connections 

• Avoid operating beyond specified temperature limits 

Technical Comparison

Alternative Models

• RLM02 

• CI871 

• YPK112A 

Key Differentiators

• Unlike Y-Link (3-module combination), RLM01 is a single unit 

• No configuration required in control software 

• Transparent operation preserves original PROFIBUS addressing 

The structure and details of the product：

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