{"product_id":"tb840-3bse021456r1-abb-ac-800m-optical-cluster-modem","title":"TB840 3BSE021456R1 ABB AC 800M Optical Cluster Modem","description":"\u003ch2\u003eABB TB840 3BSE021456R1 S800 Series Optical Cluster Modem\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eABB TB840 3BSE021456R1\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eTB840\u003c\/strong\u003e Optical Cluster Modem, operates as a dedicated hardware component for 1+1 redundant optical communication within ABB AC 800M Control System architectures.\u003c\/p\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\u003eTB840 3BSE021456R1\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\u003e0.272 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e160 x 157 x 80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eStandard industrial range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eDrawn from Modulebus baseplate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface Type\u003c\/td\u003e\n\u003ctd\u003eOptical Modulebus Cluster Interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Transfer Rate\u003c\/td\u003e\n\u003ctd\u003eUp to 9600 bps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy\u003c\/td\u003e\n\u003ctd\u003e1+1 Optical Communication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Compatibility\u003c\/td\u003e\n\u003ctd\u003eABB AC 800M Control System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuperseded Model\u003c\/td\u003e\n\u003ctd\u003eTB840A (Pin-Compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Backplane Communication \u0026amp; Optical Redundancy\u003c\/h3\u003e\n\u003cp\u003eThe module establishes dual-channel optical links between S800 I\/O clusters and main controller nodes over the optical Modulebus network. Utilizing a 1+1 redundant architecture, the hardware executes real-time channel switching to maintain deterministic network communications during single-fiber link failures. Internal processing components buffer data transmission to minimize protocol latencies, preventing communication timeouts while scaling I\/O density across distributed rack configurations. Fiber optic media eliminates electrical ground loops and preserves signal integrity in high-noise industrial environments.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the TB840 handle hot-swapping during 1+1 redundant optical operation?\u003c\/p\u003e\n\u003cp\u003eA: You can extract and replace a faulted TB840 module without interrupting active controller traffic, provided the redundant backup module is ONLINE and primary optical communications are active. Always verify status LEDs before disengaging the physical locking mechanism from the baseplate.\u003c\/p\u003e\n\u003cp\u003eQ: Can you directly swap a legacy TB840 3BSE021456R1 with the superseded TB840A model?\u003c\/p\u003e\n\u003cp\u003eA: Yes. The TB840A is fully pin-compatible with the TB840. You can mount it directly onto the existing Modulebus baseplate without altering field cabling, fiber runs, or cabinet mechanical layouts.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eFollow these technical procedures during field deployment to maintain hardware integrity:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Connector Care\u003c\/strong\u003e: Keep protective rubber covers over optical ports until fiber optic connectors are mated. Clean all optical fiber ferrules with isopropyl alcohol wipes before insertion to prevent signal attenuation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Isolation\u003c\/strong\u003e: Ensure the underlying Modulebus rack power or target baseplate bus is de-energized or set to hot-swap mode prior to inserting the module into its chassis slot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Routing Restrictions\u003c\/strong\u003e: Maintain a minimum bend radius for all optical fiber cables within the cabinet wiring ducting. Never bend fiber cables sharp around metallic corners or exceed specified mechanical tension limits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEarth Grounding\u003c\/strong\u003e: Ensure the enclosure and DIN-rail baseplate maintain a low-impedance connection to the main cabinet ground bar to prevent electrostatic discharge buildup.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":43771883028579,"sku":"TB840 3BSE021456R1","price":676.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/159_1c699107-7c55-4984-a8a7-8f4f66f736f4.jpg?v=1760146494","url":"https:\/\/www.autocontrolglobal.com\/products\/tb840-3bse021456r1-abb-ac-800m-optical-cluster-modem","provider":"AutoControl Global","version":"1.0","type":"link"}