{"product_id":"tb840a-3bse037760r1-abb-s800-i-o-modulebus-cluster-modem","title":"TB840A 3BSE037760R1 ABB S800 I\/O Modulebus Cluster Modem","description":"\u003cp\u003eConfigured for optical-to-electrical signal conversion in S800 I\/O distributed control network platforms, the \u003cstrong\u003eABB TB840A\u003c\/strong\u003e (\u003cstrong\u003e3BSE037760R1\u003c\/strong\u003e Modulebus Cluster Modem) provides direct physical electrical execution for interconnecting I\/O clusters via fiber optic interfaces.\u003c\/p\u003e\n\u003ch3\u003eModel Identification and Suffix Reference\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBase Model: TB840A\u003c\/li\u003e\n\u003cli\u003eOrdering Part Number: 3BSE037760R1\u003c\/li\u003e\n\u003cli\u003eFunction: Optical ModuleBus Cluster Modem\u003c\/li\u003e\n\u003cli\u003eSeries: S800 I\/O\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eTB840A (3BSE037760R1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eABB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eSweden\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e5.3 x 10.5 x 12 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e120 mA (at 24 VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtocol\u003c\/td\u003e\n\u003ctd\u003eModuleBus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax I\/O Modules\u003c\/td\u003e\n\u003ctd\u003e12 (Electrical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication and Deterministic Scaling\u003c\/h3\u003e\n\u003cp\u003eThe TB840A modem enables I\/O density scaling by supporting up to 7 fiber-linked clusters, with each cluster accommodating up to 12 electrical I\/O modules. The modem provides galvanic isolation through its optical interface, ensuring that backplane bus communication velocity remains stable even in high-interference environments. Its internal circuitry maintains firm firmware flash compatibility, allowing the host controller to manage diagnostic supervision of both the electrical ModuleBus and secondary power supply rails.\u003c\/p\u003e\n\u003ch3\u003eOrdering Info\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 unit: TB840A Modulebus Cluster Modem\u003c\/li\u003e\n\u003cli\u003e1 set: Technical safety and compliance documentation\u003c\/li\u003e\n\u003cli\u003e1 unit: Protective port covers for fiber optic interfaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation and Operational Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMounting and Integration:\n\u003cul\u003e\n\u003cli\u003eThe modem is designed for integration with compatible TU series termination units.\u003c\/li\u003e\n\u003cli\u003eEnsure the electrical ModuleBus connector is fully seated to maintain bus continuity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eSignal and Power Connections:\n\u003cul\u003e\n\u003cli\u003eConnect the fiber optic media to the two optical ports to establish the redundant or extended ModuleBus link.\u003c\/li\u003e\n\u003cli\u003eEnsure the 24 VDC power supply input is within the specified range and fused according to system requirements.\u003c\/li\u003e\n\u003cli\u003eVerify that the cluster addressing matches the system configuration to prevent communication errors on the optical loop.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eQ: How does the TB840A facilitate redundant operation?\u003c\/p\u003e\n\u003cp\u003eA: In 1+1 redundant configurations, two TB840A units connect to the same electrical ModuleBus while utilizing distinct optical ModuleBus lines to provide fault-tolerant communication.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: What is the primary difference between the TB840 and TB840A?\u003c\/p\u003e\n\u003cp\u003eA: The TB840A is an evolution of the modem series, specifically designed for use in redundant I\/O configurations requiring synchronized fiber optic links.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: Is the TB840A hot-swappable?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the modem can be replaced while the system is powered, provided the redundancy logic is handled by the primary controller to prevent process interruption.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: What happens if a fiber link is severed?\u003c\/p\u003e\n\u003cp\u003eA: The modem triggers a supervisory alarm via the ModuleBus, allowing the host controller to switch to the redundant optical link if configured.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: Does this modem provide isolated power to connected I\/O?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the unit includes an isolated power supply interface for the attached I\/O modules, protecting them from electrical noise on the main supply.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: What is the maximum distance for the fiber optic link?\u003c\/p\u003e\n\u003cp\u003eA: The distance is limited by the fiber type and transceiver capability; refer to the specific optical budget calculation for your fiber medium.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: Does the modem require external configuration software?\u003c\/p\u003e\n\u003cp\u003eA: No, the modem is configured through the system controller's I\/O bus settings; it acts as a transparent physical layer interface.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: Can I connect more than 12 I\/O modules to one TB840A?\u003c\/p\u003e\n\u003cp\u003eA: The electrical interface is limited to 12 modules; to add more, you must utilize the fiber optic interface to bridge to an additional I\/O cluster.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":46021152440493,"sku":"3BSE037760R1","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/TB840A_154.jpg?v=1783415905","url":"https:\/\/www.maxwellplc.com\/products\/tb840a-3bse037760r1-abb-s800-i-o-modulebus-cluster-modem","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}