{"product_id":"honeywell-bphm64-hart-backplane","title":"Honeywell BPHM64 HART Backplane","description":"\u003cp\u003eThe \u003cstrong\u003eHoneywell BPHM64\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eBPHM64\u003c\/strong\u003e HART Backplane, operates as a dedicated hardware component for HART interface signal multiplexing and field instrument bus consolidation within Honeywell Experion PKS and DCS platforms. Manufactured by MTL Instruments, the unit hosts up to 1 x MTL4841 communications module and 4 x MTL4842 HART interface modules, routing field digital communication signals directly to higher-level automation networks. It provides physical carrier infrastructure and electrical power distribution to sustain multi-channel HART signal extraction without interrupting underlying control loops.\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\u003eBPHM64\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHoneywell \/ MTL Instruments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard MTL HART backplane footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.35 W maximum (with 1 x MTL4841 and 4 x MTL4842 modules)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Capacity\u003c\/td\u003e\n\u003ctd\u003e1 x MTL4841 comms module, 4 x MTL4842 HART interface modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Ratio Requirement\u003c\/td\u003e\n\u003ctd\u003e1 x MTL4841 module required per 16 x MTL4842 modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable Interfaces\u003c\/td\u003e\n\u003ctd\u003e4 x DIN41651 20-way ribbon cables (16 HART signal lines + 4 common returns per cable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Connections\u003c\/td\u003e\n\u003ctd\u003eScrew terminal interface or custom backplane connectors\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 \u0026amp; Channel-to-Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe BPHM64 backplane uses isolated signal conditioning channels to decouple digital HART frequency-shift keying (FSK) signals from analog loop currents. Internal galvanic isolation barriers prevent common-mode voltage spikes and ground loop noise from passing between individual transmitter channels or into the host DCS system. By maintaining strict channel-to-channel isolation across all 20-way DIN41651 ribbon cable connections, the backplane preserves 4-20 mA HART loop protocol signal integrity and shields process measurement networks against electromagnetic noise.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the MTL4842 interface modules be installed or removed while the BPHM64 backplane is powered?\u003c\/p\u003e\n\u003cp\u003eA: Yes, individual HART interface modules support live insertion and removal, provided the multi-pin DIN backplane bus connectors are kept aligned during hot-swapping to avoid shorting adjacent power rails.\u003c\/p\u003e\n\u003cp\u003eQ: How are field instrument signals physically routed to the BPHM64 backplane?\u003c\/p\u003e\n\u003cp\u003eA: Signal connections pass through 4 x DIN41651 20-way ribbon cable assemblies, where each cable carries 16 discrete HART signal connections along with 4 common return lines to screw terminal interfaces.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eMount the backplane securely onto a standard DIN-rail or mounting plate inside the enclosure using all dedicated chassis mounting points.\u003c\/li\u003e\n\u003cli\u003eConnect the 20-way DIN41651 ribbon cables to the designated I\/O terminal blocks, ensuring keyways line up correctly to prevent reverse polarity insertion.\u003c\/li\u003e\n\u003cli\u003eVerify that the backplane functional earth ground terminal connects to the main cabinet grounding bus bar via a low-impedance conductor.\u003c\/li\u003e\n\u003cli\u003eCheck that the total module complement does not exceed the system ratio limit of one MTL4841 communications module per sixteen MTL4842 HART interface modules.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":53625447481653,"sku":"BPHM64","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/BPHM64.png?v=1790048481","url":"https:\/\/www.5gplc.com\/products\/honeywell-bphm64-hart-backplane","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}