{"product_id":"honeywell-8u-pdisa1-digital-input-module","title":"Honeywell 8U-PDISA1 Digital Input Sequence of Events Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Honeywell 8U-PDISA1 is a high-performance 32-channel digital input module engineered for Sequence of Events (SOE) recording in critical industrial automation environments. This module provides high-speed signal monitoring with 1 ms resolution, enabling precise timestamping of field events for root-cause analysis and operational diagnostics in power generation, oil and gas, and complex process control applications.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e32 discrete input channels supporting 24 VDC industrial signals.\u003c\/li\u003e\n\u003cli\u003eSequence of Events (SOE) capability with 1 ms resolution for accurate event logging.\u003c\/li\u003e\n\u003cli\u003eDual scanning modes: 20 ms normal scan cycle and 5 ms fast scan cycle for high-priority signals.\u003c\/li\u003e\n\u003cli\u003eIntegrated optical isolation providing 1000 VAC RMS or ±1000 VDC galvanic separation.\u003c\/li\u003e\n\u003cli\u003eHot-swappable design allowing for module replacement without interrupting system operation.\u003c\/li\u003e\n\u003cli\u003eRobust electrical protection against ground potential differences and transient surges.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis module is designed for use in systems requiring detailed event sequence tracking, such as turbine control, emergency shutdown systems (ESD), and complex process monitoring where millisecond-level accuracy is required to analyze process disturbances and equipment trips.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\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\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\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e95 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the system power is managed according to site safety protocols before installing or removing the module, although the unit supports hot-swapping.\u003c\/li\u003e\n\u003cli\u003eVerify that field wiring is correctly terminated to the appropriate terminal blocks before seating the module into the I\/O rack.\u003c\/li\u003e\n\u003cli\u003eMaintain proper grounding practices to ensure the effectiveness of the module's galvanic isolation.\u003c\/li\u003e\n\u003cli\u003eEnsure adequate ventilation in the cabinet to maintain ambient temperatures within the specified 0 to 60 deg C range.\u003c\/li\u003e\n\u003cli\u003eHandle with care to prevent electrostatic discharge (ESD) damage to the module's internal circuitry.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eDoes this module support hot-swapping?\u003c\/h3\u003e\u003cp\u003eYes, the 8U-PDISA1 is designed to support removal and insertion under power (hot-swap), which helps minimize downtime during maintenance in continuous process environments.\u003c\/p\u003e\u003ch3\u003eWhat is the primary purpose of the SOE functionality?\u003c\/h3\u003e\u003cp\u003eThe Sequence of Events (SOE) functionality allows the system to capture and timestamp field signal transitions with 1 ms resolution, which is essential for post-incident analysis and troubleshooting complex process disturbances.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":44656450076760,"sku":"8U-PDISA1","price":172.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/wm_1_fe0e02bf-eee0-4d45-8f25-2ce830700ab1.jpg?v=1787674111","url":"https:\/\/www.industriaxplc.com\/id\/products\/honeywell-8u-pdisa1-digital-input-module","provider":"IndustriaX Limited","version":"1.0","type":"link"}