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Description：

You can position the module directly after a master,before a bus segment with several slaves or beforean individual slave. PROFIBUS stations with redun-dant couplers [K] can be directly connected to thePROFIBUS set redundant by RLM02.

Stations with only one interface can be optionallyassigned to the A or B line. Each RLM02 PROFIBUSinterface can serve up to 31 PROFIBUS stations. Us-ing repeaters [R] and media converters [O/E] makesit possible to increase the length of the PROFIBUSlines and the number of stations.

The three RS 485 interfaces of the module supportall transmission rates specified in IEC 61158-2 forthe PROFIBUS from 9.6 kbit/s to 12 Mbit/s. The module has repeater functionality, i.e., it regener-ates the signal shape and the amplitude of receiveddata. RLM02 monitors all three lines A, B and Mforactivity and error states.

Detected errors are signalled by LEDs (light emittingdiodes) on the front panel. The potential-free alarmcontact activated in parallel to this can be polled fordiagnostic purposes by the process control systemPCS or by a PLC. Thethree serial RS 485 interfaces are potential-free rela-tive to each other and to the power supply. This is afunctional electrical isolation.

Specification：

Frequently asked questions

Q1: What is the ABB RLM02 3BSE091723R1 Link Module?

A1: It is an industrial link module used for communication and signal interfacing within ABB and control systems.

Q2: What is the RLM02 3BSE091723R1 device protection class of this module?

A2: The RLM02 3BSE091723R1 device protection class is Class 3.

Q3: What is the RLM02 3BSE091723R1 operating voltage range?

A3: The RLM02 3BSE091723R1 operating voltage is 24 VDC with a range of +20 V to +33 V.

Q4: What is the RLM02 3BSE091723R1 operating temperature range?

A4: The RLM02 3BSE091723R1 operating temperature range is 0°C to +55°C.

Q5: What is the RLM02 3BSE091723R1 maximum installation altitude supported?

A5: The RLM02 3BSE091723R1 module supports installation at altitudes up to 2000 meters.

Product Applications

Electricity and Energy: Used in the hydraulic control systems of steam turbines in thermal power plants, actuators in hydropower stations, and generator excitation control to ensure the stability and safety of core power station facilities.

Petroleum, Chemicals and Natural Gas: In highly explosive and environmentally complex refineries and chemical plants, guarantee continuous communication between critical control systems (such as DCS) and on-site instruments.

Water Treatment and Environmental Protection: Remote I/O stations distributed in large sewage treatment plants or water supply networks to ensure the real-time and accurate transmission of critical data and control instructions.

Benefits

• Conversion of one simple, non- redundant PROFIBUSline into two reciprocally redundant lines A/B

• Use on PROFIBUSDP/FMSlines

• 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 rail