{"product_id":"396458-18-1-emerson-i-o-expansion-board","title":"396458-18-1 Emerson I\/O Expansion Board","description":"\u003cp\u003eThe \u003cstrong\u003eEmerson 396458-18-1\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e396458-18-1\u003c\/strong\u003e I\/O Expansion Board, operates as a dedicated hardware component for high-density signal distribution and module interface housing within DeltaV and Ovation control architectures. The unit provides physical slot alignment, backplane communications routing, and power distribution for up to 16 analog, digital, and temperature I\/O modules across system expansion racks.\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\u003e396458-18-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eEmerson\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\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e2.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e482.6 mm x 132 mm x 100 mm\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\u003eSystem backplane \/ Field loop powered\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e24 VDC or 110\/220 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 16 I\/O modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Style\u003c\/td\u003e\n\u003ctd\u003eDIN rail or panel-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnvironmental Protection\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003eHigh-speed DeltaV or Ovation system bus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagnostic Visuals\u003c\/td\u003e\n\u003ctd\u003eLED indicators for power status, module status, and communication activity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical Safeguards\u003c\/td\u003e\n\u003ctd\u003eOvervoltage protection, overcurrent protection, and signal isolation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003e4-20 mA HART Loop Protocol and Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe expansion board incorporates systemic channel-to-channel isolation networks across the backplane bus interface to block differential ground noise between connected I\/O channels. Internal bus traces maintain full pass-through integrity for 4-20 mA HART loop protocol signals, preserving digital secondary variables and HART device diagnostic data routed to controller nodes. Onboard electrical safeguards, combined with local cold junction compensation support on incoming thermal channels, prevent environmental signal drift and sustain conversion precision under severe cabinet temperature variations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can individual I\/O modules installed on the 396458-18-1 base be hot-swapped during online operations?\u003c\/p\u003e\n\u003cp\u003eA: Yes, provided the host DeltaV or Ovation carrier setup permits RIUP (Removal and Insertion Under Power). Replacing an I\/O card interrupts processing only for the affected slot without disturbing bus communication to adjacent modules.\u003c\/p\u003e\n\u003cp\u003eQ: How is primary system earth grounding established on the assembly?\u003c\/p\u003e\n\u003cp\u003eA: The expansion board must be bonded directly to the cabinet functional earth bus via dedicated grounding lugs on the base chassis to ensure overvoltage protection and signal isolation circuits function correctly.\u003c\/p\u003e\n\u003cp\u003eQ: What power sources can be wired to the primary power input terminals?\u003c\/p\u003e\n\u003cp\u003eA: The board features a wide-range power interface accepting either direct 24 VDC industrial loop supplies or standard 110\/220 VAC mains sources.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eMount the expansion base horizontally on a standard 35 mm DIN rail or bolt directly to an enclosure backpanel using the designated mounting holes.\u003c\/li\u003e\n\u003cli\u003eConnect a heavy-gauge copper conductor from the chassis ground terminal directly to the enclosure main earth grounding bus bar.\u003c\/li\u003e\n\u003cli\u003eWire the incoming power supply line (24 VDC or 110\/220 VAC) to the terminal strip, verifying line polarity and voltage levels before energizing.\u003c\/li\u003e\n\u003cli\u003eAlign module rear connectors carefully with the target slot keyways on the backplane and push firmly until slot lock latches engage fully.\u003c\/li\u003e\n\u003cli\u003eTerminate all field signal cable drain shields at a dedicated single-point ground rail separate from the backplane power supply connections.\u003c\/li\u003e\n\u003cli\u003eVerify status LEDs on the base assembly to confirm proper DC bus power distribution and active system bus communication.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"EMERSON","offers":[{"title":"Default Title","offer_id":53445449154869,"sku":"396458-18-1","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/396357-02-4_13b92f4a-fb37-4c7d-aad4-5e1715704824.png?v=1788337810","url":"https:\/\/www.5gplc.com\/products\/396458-18-1-emerson-i-o-expansion-board","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}