{"product_id":"abb-advant-ocs-and-advant-800xa-rlm02-3bse091723r1-redundancy-link-module","title":"ABB RLM02 3BSE091723R1 Redundancy Link Module","description":"\u003cp\u003eThe ABB RLM02 (3BSE091723R1) is a PROFIBUS DP\/FMS Redundancy Link Module designed to provide cable redundancy for PROFIBUS communication networks. It functions as an active repeater and switch, converting a single non-redundant PROFIBUS RS-485 line into two redundant communication lines (A\/B), or vice versa. This ensures high-availability communication by automatically switching to the healthy path if a cable or segment fails, preventing downtime in critical automation systems.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSupports PROFIBUS DP and FMS protocols.\u003c\/li\u003e\n\u003cli\u003eTransmission rates from 9.6 kbit\/s to 12 Mbit\/s.\u003c\/li\u003e\n\u003cli\u003eActive repeater functionality for signal regeneration.\u003c\/li\u003e\n\u003cli\u003eAutomatic line selection and monitoring of communication quality.\u003c\/li\u003e\n\u003cli\u003eRedundant power supply support with potential-free alarm contact.\u003c\/li\u003e\n\u003cli\u003eStatus LEDs for bus activity, errors, and power supply monitoring.\u003c\/li\u003e\n\u003cli\u003eSimple DIN-rail mounting.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTurbine Generators (Gas\/Steam\/Hydro).\u003c\/li\u003e\n\u003cli\u003eBoiler Control Systems and redundant combustion loops.\u003c\/li\u003e\n\u003cli\u003eEmergency Diesel Generators (EDGs).\u003c\/li\u003e\n\u003cli\u003eLarge-Scale Compressors and Pumps for oil\/gas pipelines.\u003c\/li\u003e\n\u003cli\u003eIndustrial Kilns and Furnaces.\u003c\/li\u003e\n\u003cli\u003eWater Treatment Machinery and automated filtration systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eRLM02 3BSE091723R1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e120 mA (typical at 24 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Loss\u003c\/td\u003e\n\u003ctd\u003eApprox. 3.6 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRS-485 Interface\u003c\/td\u003e\n\u003ctd\u003e9-pin Sub-D connector (A, B, M)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Rate\u003c\/td\u003e\n\u003ctd\u003e9.6 kbit\/s to 12 Mbit\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical Isolation\u003c\/td\u003e\n\u003ctd\u003e500 Veff (functional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 degC to +55 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-30 degC to +85 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Class\u003c\/td\u003e\n\u003ctd\u003eIP20 \/ Device Class 3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the module is mounted on a standard DIN rail in an appropriate enclosure (IP20 rated).\u003c\/li\u003e\n\u003cli\u003eMaintain an ambient operating temperature between 0 degC and +55 degC with adequate ventilation.\u003c\/li\u003e\n\u003cli\u003eEnsure all PROFIBUS cables are properly shielded and grounded according to standard industrial practices to prevent EMI.\u003c\/li\u003e\n\u003cli\u003eThe module provides functional electrical isolation; ensure power supply connections are secure and polarity is correct.\u003c\/li\u003e\n\u003cli\u003eAlways power down the system before inserting or removing the module from the DIN rail.\u003c\/li\u003e\n\u003cli\u003eThe potential-free alarm contact can be wired to a PLC or DCS input for diagnostic monitoring of module health.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eWhat is the ABB RLM02 3BSE091723R1?\u003c\/h3\u003e\u003cp\u003eThe ABB RLM02 is an active switch that integrates single-interface PROFIBUS devices into a redundant RS485 PROFIBUS network, ensuring fault-tolerant communication.\u003c\/p\u003e\u003ch3\u003eHow does it handle communication faults?\u003c\/h3\u003e\u003cp\u003eThe module monitors lines A, B, and M for activity. If an error is detected on one of the redundant lines, the logic automatically switches to the operational path without interrupting data exchange.\u003c\/p\u003e\u003ch3\u003eWhat is the maximum number of connected devices?\u003c\/h3\u003e\u003cp\u003eEach RLM02 PROFIBUS interface can support up to 31 PROFIBUS stations.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":50994826936572,"sku":"RLM02 3BSE091723R1","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_48a02cc8-e45f-4d6c-9957-d80cc239e24b.jpg?v=1787068968","url":"https:\/\/www.electronicplc.com\/products\/abb-advant-ocs-and-advant-800xa-rlm02-3bse091723r1-redundancy-link-module","provider":"Electronic PLC","version":"1.0","type":"link"}