RLM02 ABB PROFIBUS Redundancy Link Module

ABB RLM02 Redundancy Link Module for PROFIBUS DP/FMS

The ABB RLM02 Redundancy Link Module is designed to convert a non-redundant PROFIBUS line into two redundant RS485 lines, providing enhanced reliability and functionality for industrial communication systems. Below are the detailed specifications and features of the RLM02 module.

Benefits

• Conversion Capability: Converts one non-redundant PROFIBUS line into two redundant lines (A/B).
• Versatile Use: Applicable for PROFIBUS DP/FMS lines.
• Automatic Line Selection: Automatically selects the operational line.
• Wide Transmission Rate Range: Supports rates from 9.6 kbit/s to 12 Mbit/s.
• Communication Monitoring: Continuous monitoring of communication lines.
• Repeater Functionality: Regenerates signal shape and amplitude.
• Redundant Power Supply: Ensures uninterrupted power.
• Status and Error Display: LEDs indicate operational status and errors.
• Potential-Free Alarm Contact: Provides diagnostic capabilities.
• Easy Installation: Mounts on standard DIN rails.

Features

• Positioning: Can be placed directly after a master, before bus segments with multiple slaves, or before individual slaves.
• Redundant Coupler Compatibility: Connects directly to PROFIBUS stations with redundant couplers.
• Interface Assignment: Allows optional assignment of stations to line A or B.
• Capacity: Each interface can handle up to 31 PROFIBUS stations.
• Extended Line Length: Utilizes repeaters and media converters to extend PROFIBUS lines.

Function

• RS 485 Interfaces: Supports all transmission rates from 9.6 kbit/s to 12 Mbit/s as specified in IEC 61158-2.
• Repeater Functionality: Regenerates signal shape and amplitude.
• Monitoring: Monitors lines A, B, and M for activity and errors.
• Error Indication: Errors are indicated by front panel LEDs and potential-free alarm contacts.
• Power Supply Monitoring: Tests the presence of both power sources.

Technical Specifications

Adjustment and Indication