{"product_id":"8u-pdisa1-honeywell-digital-input-sequence-of-events-module","title":"8U-PDISA1 Honeywell Digital Input Sequence of Events Module","description":"\u003cp\u003eConfigured for high-speed discrete signal monitoring and timestamping in Honeywell Experion PKS platforms, the \u003cstrong\u003eHoneywell 8U-PDISA1\u003c\/strong\u003e (\u003cstrong\u003e8U-PDISA1\u003c\/strong\u003e Digital Input Sequence of Events Module) provides direct physical\/electrical execution.\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\u003e8U-PDISA1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHoneywell\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\u003e0.35 kg nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard Series C Module Footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e95 mA nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e32 discrete inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e18 to 30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSOE Resolution\u003c\/td\u003e\n\u003ctd\u003e1 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScan Time\u003c\/td\u003e\n\u003ctd\u003e20 ms (normal) \/ 5 ms (fast)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003e1000 VAC RMS \/ +\/-1000 VDC\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 Pass-Through and Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eHoneywell 8U-PDISA1\u003c\/strong\u003e incorporates galvanically isolated optical coupling stages providing 1000 VAC RMS or +\/-1000 VDC isolation between field-side input channels and internal processing logic. The high-density signal conditioning block filters 24 VDC discrete transitions across 32 channels, suppressing common-mode potential offsets, high-frequency surge transients, and ground loop disturbances. Integrated timing circuitry enables Sequence of Events (SOE) timestamping with 1 ms resolution across both 20 ms standard and 5 ms fast scan configurations without introducing thermal drift.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 8U-PDISA1 module support live hot-swapping under power?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the unit features hot-swappable architecture, allowing insertion and removal without interrupting system backplane operations or de-energizing cabinet power.\u003c\/p\u003e\n\u003cp\u003eQ: What is the primary function of the SOE capabilities on this digital input card?\u003c\/p\u003e\n\u003cp\u003eA: The Sequence of Events (SOE) feature logs field signal transitions with 1 ms timestamp resolution for root-cause analysis during equipment trips and process disturbances.\u003c\/p\u003e\n\u003cp\u003eQ: What input voltage thresholds are supported across the 32 discrete channels?\u003c\/p\u003e\n\u003cp\u003eA: The module accepts a nominal voltage of 24 VDC with an operational input voltage range of 18 to 30 VDC.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eConfirm proper cabinet grounding practices by bonding the I\/O rack chassis directly to the primary enclosure Earth bar using a low-impedance conductor.\u003c\/li\u003e\n\u003cli\u003eInspect backplane connectors for pin damage or foreign debris before seating the 8U-PDISA1 module into its designated rack slot.\u003c\/li\u003e\n\u003cli\u003eRoute 24 VDC discrete input field wiring through dedicated grounded metallic conduits separated by at least 300 mm from AC power distribution lines.\u003c\/li\u003e\n\u003cli\u003eObserve static-safe handling protocols including grounded ESD wrist straps during installation and maintenance procedures.\u003c\/li\u003e\n\u003cli\u003eEnsure cabinet ventilation systems maintain ambient operational temperatures within the defined range of 0 to 60 deg C.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":52318629167400,"sku":"8U-PDISA1","price":315.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0827\/6266\/2184\/files\/8C-PDIPA151454471-375_09150061-8fb6-42f8-aed5-d3e1a37de656.png?v=1788318986","url":"https:\/\/www.powerdcs.com\/products\/8u-pdisa1-honeywell-digital-input-sequence-of-events-module","provider":"Power DCS Parts Limited","version":"1.0","type":"link"}