{"product_id":"abb-tb840-3bse021456r1-s800-modulebus-cluster-modem","title":"ABB TB840 3BSE021456R1 S800 Modulebus Cluster Modem","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eABB TB840 (3BSE021456R1)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as a high-performance Modulebus Cluster Modem within the S800 I\/O system. This optical modem facilitates the connection between a Fieldbus Communication Interface (FCI) and remote I\/O clusters over fiber optic links. We supply this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New and Original\u003c\/strong\u003e, featuring native support for 1+1 redundant configurations. It enables deterministic, long-distance communication between I\/O stations, ensuring high-speed data synchronization across distributed control architectures while maintaining total electrical isolation.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp\u003eThe TB840 utilizes specialized optical circuitry to bridge communication across industrial I\/O segments:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTB840 \/ 3BSE021456R1\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOptical Cluster Modem\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eRedundancy\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSupports 1+1 Redundant Operation\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProduct Net Height\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e15.7 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProduct Net Width\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8.0 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProduct Net Depth\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e16.0 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProduct Net Weight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.272 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eHS Code\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e85389091\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInterface Compatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eS800 Modulebus (Optical)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInterchangeability\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePin compatible with TB840A\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eEngineering Advantages\u003c\/h2\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFault-Tolerant 1+1 Redundancy:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe TB840 architecture supports 1+1 redundant pairing. If the primary optical link or modem hardware fails, the redundant pair assumes the communication load instantly. This ensures continuous I\/O data flow for mission-critical processes where network downtime results in immediate production loss.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eComplete EMI\/RFI Immunity:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBy utilizing fiber optic media for the Modulebus extension, the TB840 eliminates the risk of electromagnetic interference. This allows engineers to route communication cables through areas with high-voltage switchgear, large motors, and variable frequency drives (VFDs) without signal degradation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Speed Cluster Synchronization:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe modem manages the transition from electrical Modulebus to optical signals with microsecond-level latency. This maintains the deterministic performance of the S800 I\/O system, allowing remote clusters to operate with the same precision as locally mounted modules.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eGalvanic Isolation Between Clusters:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe optical link provides a total electrical break between the I\/O stations. This prevents ground loops and protects sensitive control electronics from transient voltage spikes and lightning strikes that might travel through traditional copper cabling between different plant buildings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaintenance-Friendly Design:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFront-panel diagnostics provide real-time status of the optical link and internal module health. Technicians can identify a degraded fiber signal or a hardware fault at a glance, facilitating rapid maintenance without specialized network analysis tools.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between the TB840 and the TB840A?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe TB840A is the direct, pin-compatible successor to the TB840 (3BSE021456R1). While the internal hardware components differ, the functionality remains identical. You can use the TB840 as a drop-in replacement for existing TB840A installations without any software or configuration changes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the TB840 require a specific baseplate or MTU?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. You must mount the TB840 on a compatible Module Termination Unit (MTU), such as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTU840\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eor\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTU841\u003c\/strong\u003e, which provides the mechanical support and electrical connections for the 24V DC power and the fiber optic cables.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a factory-sealed, 100% Brand New unit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAbsolutely. We guarantee this TB840 (3BSE021456R1) is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoriginal hardware. It arrives in the original ABB factory packaging with all security seals, serial numbers, and technical documentation intact.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHow many I\/O clusters can I connect using the TB840?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe TB840 typically connects one remote cluster to the FCI. By utilizing optical splitters or additional modems in a star or daisy-chain topology, you can expand the S800 system to include up to seven remote I\/O clusters.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":53096074510520,"sku":"TB840 3BSE021456R1","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/TB8403BSE021456R1.jpg?v=1774431589","url":"https:\/\/www.globalpetroparts.com\/products\/abb-tb840-3bse021456r1-s800-modulebus-cluster-modem","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}