Manufacture	ABB
Item No	RLM01
Article number	3BDZ000398R1
Series	800XA Control Systems
Origin	Sweden
Dimension	155*155*67(mm)
Weight	0.4kg
Customs Tariff Number	85389091
Type	Link Module

 ABB RLM01 3BDZ000398R1 PROFIBUS Redundancy Link Module The RLM 01 converts a simple non-redundant Profibus line into two mutually redundant lines A/B. The module works bidirectionally, which means that all three interfaces can receive and transmit data. The RLM01 does not support master redundancy, i.e. one master operates only line A and the other only line B. Even though both masters balance their own program modules on the application level, the bus communication is asynchronous. The Melody central unit CMC 60/70 provides clock-synchronized communication thanks to redundant PROFIBUS terminals (A and B).•Conversion: Line M <=> Lines A/B • Use on PROFIBUS DP/FMS lines • Automatic line selection • Transmission rate 9.6 kBit/s .... 12 MBit/s • Monitoring of communication • Repeater functionality • Redundant power supply • Status and error display • Monitoring of the power supply • Potential-free alarm contact • Simple assembly on DIN mounting railFrequently asked questions about the product are as follows: -What are the functions of the ABB RLM01 3BDZ000398R1 PROFIBUS Redundant Link Module? The ABB RLM01 is a PROFIBUS Redundant Link Module that ensures redundant communication between PROFIBUS devices in critical systems. The module creates redundant communication paths by enabling two PROFIBUS networks to operate simultaneously. -How does PROFIBUS redundancy in the ABB RLM01 module work? The RLM01 creates redundant PROFIBUS networks by providing two independent communication paths. Primary link The primary communication link between PROFIBUS devices. Secondary link The backup communication link that automatically takes over if the primary link fails. The RLM01 continuously monitors both communication links. If a fault or error is detected in the primary link, the module switches to the secondary link without interrupting the operation of the system. -What are the main functions of the ABB RLM01 Redundant Link Module? Redundancy support provides a seamless failover mechanism between two PROFIBUS networks. Fault-tolerant communication ensures continuous communication in systems where downtime is critical. High availability is suitable for applications where system availability and reliability are critical, such as automation and process control systems. Hot-swap capability In some configurations, you can replace or maintain redundant modules without shutting down the entire system.