{"product_id":"foxboro-a2h254-16-p0973bk-ethernet-switch","title":"Foxboro A2H254-16 P0973BK Ethernet Switch","description":"\u003cp\u003eThe \u003cstrong\u003eFoxboro A2H254-16 P0973BK\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eA2H254-16\u003c\/strong\u003e Ethernet Switch, operates as a dedicated hardware component for deterministic network packet routing and industrial network backhaul communication within Foxboro DCS architectures. Configured with 16 total Fast Ethernet ports and dual Mini-GBIC SFP uplink expansion slots, it manages real-time control traffic across enterprise and industrial network segments.\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\u003eA2H254-16 P0973BK\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\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to +50 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e30 W maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Port Count\u003c\/td\u003e\n\u003ctd\u003e16 Fast Ethernet ports + 2 Mini-GBIC SFP slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCopper Interfaces\u003c\/td\u003e\n\u003ctd\u003e8 x 10\/100 Mbps RJ45 (100BASE-T)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiber Interfaces\u003c\/td\u003e\n\u003ctd\u003e8 x 100BASE-FX multimode MT-RJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStacking Capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 8 units via SecureStack bus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eChannel-to-Channel Isolation and Loop Protocol Connectivity\u003c\/h3\u003e\n\u003cp\u003eThe Foxboro A2H254-16 P0973BK switch incorporates physical optical isolation via its multimode MT-RJ fiber ports, preventing high common-mode noise and ground potential differences between field enclosures from disrupting control data. This optical isolation isolates DCS node communications from high-voltage surges, preserving signal integrity for underlying 4-20 mA HART loop protocol field networks and preventing thermal ground loop offsets at remote cold junction compensation (CJC) sensor nodes.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does auto-negotiation operate on the 10\/100BASE-T copper RJ45 ports?\u003c\/p\u003e\n\u003cp\u003eA: The switch automatically senses link speed (10 Mbps or 100 Mbps) and duplex mode (half or full) on connected network devices to establish optimal physical connection parameters without manual configuration.\u003c\/p\u003e\n\u003cp\u003eQ: What is the maximum stacking limit for the A2H254-16 P0973BK assembly?\u003c\/p\u003e\n\u003cp\u003eA: Up to eight SecureStack A2 switches can be interconnected using the stacking bus, forming a single managed switch fabric with centralized IP addressing.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the switch into a standard 19-inch equipment rack or control cabinet frame using factory-approved brackets. Prior to energizing the unit, verify that cabinet power distribution feeds conform to rated input voltage limits.\u003c\/p\u003e\n\u003cp\u003eInsert fiber cables into the 100BASE-FX MT-RJ connectors carefully to avoid end-face contamination, observing minimum fiber bend radius limits. Connect copper Ethernet drops to the RJ45 ports using shielded twisted-pair (STP) cables, ensuring the shield is grounded at the cabinet entry barrier. Bond the switch chassis directly to the main cabinet earth ground bar, and ensure all conduit penetrations maintain a minimum of 5 full threads of engagement on NPT fittings.\u003c\/p\u003e","brand":"Foxboro","offers":[{"title":"Default Title","offer_id":53399164191029,"sku":"A2H254-16 P0973BK","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/A2H254-16P0973BK.png?v=1787627901","url":"https:\/\/www.5gplc.com\/products\/foxboro-a2h254-16-p0973bk-ethernet-switch","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}