{"product_id":"8-di-8-do-expansion-module-foxboro-fbm42-p0902xb-i-a-series","title":"8 DI 8 DO Expansion Module | Foxboro FBM42 P0902XB I\/A Series","description":"\u003ch2\u003eFoxboro FBM42 P0902XB I\/A Series Expansion Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eFoxboro FBM42 P0902XB\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eFBM42\u003c\/strong\u003e Digital I\/O Expansion Module, operates as a dedicated hardware component for contact input and VDC output signal processing within Foxboro I\/A Series DCS networks. Designed to expand the channel capacity of primary main modules, the assembly accommodates 8 discrete digital inputs and 8 discrete digital outputs to convert field electrical signals for real-time bus transmission.\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\u003eFBM42 P0902XB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFoxboro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.80 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e11.4 cm x 5.15 cm x 14.7 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e3 W (Maximum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Configuration\u003c\/td\u003e\n\u003ctd\u003e8 Contact\/VDC Inputs \/ 8 VDC Outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Rating\u003c\/td\u003e\n\u003ctd\u003eGalvanic Isolation between Field and Logic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Connection\u003c\/td\u003e\n\u003ctd\u003eRemovable Screw-Terminal Blocks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBus Interface\u003c\/td\u003e\n\u003ctd\u003eInternal Expansion Bus via Baseplate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Rating\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control \u0026amp; Digital Network Connectivity\u003c\/h3\u003e\n\u003cp\u003eThe FBM42 interfaces through an expandable main module to exchange discrete field signals with control processors. By maintaining galvanic isolation between field-side contacts and internal logic circuits, the module shields system electronics from field-induced electrical surges and ground loops. Channel-to-channel isolation prevents cross-talk across digital input loops and 24 VDC output lines, ensuring deterministic signal state validation for process interlocks and alarm actuation.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the FBM42 module operate as a standalone module directly on the fieldbus?\u003c\/p\u003e\n\u003cp\u003eA: No. The FBM42 is an expansion module and must connect directly to an expandable main module (such as an FBM41) via the baseplate expansion bus to share digital processor and fieldbus transceiver resources.\u003c\/p\u003e\n\u003cp\u003eQ: How does the module maintain field signal isolation?\u003c\/p\u003e\n\u003cp\u003eA: Optical coupler arrays provide galvanic isolation between the field wiring terminals and the backplane logic bus, preventing common-mode voltage spikes from damaging backplane electronics.\u003c\/p\u003e\n\u003cp\u003eQ: Does replacing the FBM42 module require shutting down the entire baseplate?\u003c\/p\u003e\n\u003cp\u003eA: No. The module supports live removal and insertion (hot-swapping) on active baseplates, provided the associated primary main module and software configuration permit fieldbus expansion re-initialization.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the FBM42 into the designated expansion slot adjacent to its primary main module on the I\/A Series baseplate. Press the module firmly onto the backplane connectors until the mechanical latch engages securely. Tighten top and bottom retaining screws to ensure proper grounding contact and resistance against cabinet vibration.\u003c\/p\u003e\n\u003cp\u003eStrip field conductors to the recommended length before securing them into the removable terminal blocks using 18-22 AWG copper wire. Separate 24 VDC output power cables from low-voltage instrument signals inside the wire ducting. Connect all cable shields to the cabinet ground bus bar to maintain electromagnetic compliance across discrete signal paths.\u003c\/p\u003e","brand":"Foxboro","offers":[{"title":"Default Title","offer_id":43931668414554,"sku":"P0902XB","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/294.1_04d7aa51-4610-4959-9b4c-5d34b45141c3.jpg?v=1787906586","url":"https:\/\/www.spareoil.com\/products\/8-di-8-do-expansion-module-foxboro-fbm42-p0902xb-i-a-series","provider":"SpareOil Automation","version":"1.0","type":"link"}