{"product_id":"abb-ps856-module-termination-units","title":"ABB PS856 Module Termination Units","description":"\u003cp\u003eThe \u003cstrong\u003eABB PS856\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003ePS856\u003c\/strong\u003e High-Density I\/O Bus Interface and Termination Board, operates as a dedicated hardware component for signal synchronization and impedance matching within industrial automation networks. Configured under part number \u003cstrong\u003e4824 506-HY\u003c\/strong\u003e, this rack-mounted hardware assembly establishes physical layer connections, bus extensions, and active signal termination to secure communication lines between upstream digital signal processors (DSP) and decentralized I\/O modules.\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\u003ePS856\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 (SE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eFactory standard subrack card weight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eCompact footprint designed for standard ABB system racks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eFactory standard industrial ambient window\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive\/Active termination network bus rail draw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e4824 506-HY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunctional Core\u003c\/td\u003e\n\u003ctd\u003eBus extension, interface linking, and termination\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Compatibility\u003c\/td\u003e\n\u003ctd\u003eABB DSP platforms and high-density I\/O modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation Format\u003c\/td\u003e\n\u003ctd\u003eDedicated rack-mounted installation slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIndustrial Control and Drives Dedicated I\/O Density Scaling\u003c\/h3\u003e\n\u003cp\u003eThe PS856 manages parallel communication lines directly over the system's distribution backplane. To transmit complex process variables and diagnostic interlocks between the DSP and the high-density I\/O modules without data attenuation or timing skew, the integrated termination circuits match line impedances to optimize backplane bus communication velocity. This reduction in signal degradation prevents data packet collision during rapid processor polling cycles, supporting clean signal execution and expanding modular I\/O density scaling options across interconnected system racks. Because the board operates as a physical routing interface, it maintains complete firmware flash compatibility with upstream master units, ensuring that system configuration tables and expansion definitions pass over the bus lines without causing signal transit noise or communication timeouts.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the high-density termination layout on the PS856 impact the system's backplane bus communication velocity?\u003c\/p\u003e\n\u003cp\u003eA: The board applies dedicated resistive networks across the high-density data paths. By absorbing electrical energy at the physical endpoints of the bus array, it eliminates high-frequency line reflections that cause bit distortion, keeping the backplane bus communication velocity stable at maximum throughput.\u003c\/p\u003e\n\u003cp\u003eQ: What physical system behavior indicates that a termination path on the PS856 has failed?\u003c\/p\u003e\n\u003cp\u003eA: A failure in the termination circuit leads to intermittent communication faults, frame errors, or lost I\/O drops. The central DSP senses these signal drops as a runtime bus timeout, logs a diagnostic error code, and moves the affected high-density I\/O channels into a pre-programmed safe state.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":47589424267454,"sku":"PS856","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/screenshot_2026-05-29_16-30-39_dc06d5b2-bcf3-4be3-a1ec-284964b15cd0.png?v=1780047780","url":"https:\/\/www.autooiltech.com\/products\/abb-ps856-module-termination-units","provider":"AutoOilTech Limited","version":"1.0","type":"link"}