{"product_id":"wesdac-d20a-ge-analog-scan-module","title":"WESDAC D20A GE Analog Scan Module","description":"\u003cp\u003eThe \u003cstrong\u003eGE WESDAC D20A\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eWESDAC D20A\u003c\/strong\u003e Analog Scan Module, operates as a dedicated hardware component for multi-channel analog signal acquisition within WESDAC D20 automation architectures.\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\u003eWESDAC D20A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGE (General Electric)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eStandard D20 Series Module Weight Profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eTwo-Module Detachable Chassis Assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eStandard Substation Operating Temperature Range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eInternal Baseplate Logic Dependent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e32 analog inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Configuration\u003c\/td\u003e\n\u003ctd\u003eConfigurable for voltage or current loops\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocols\u003c\/td\u003e\n\u003ctd\u003eDNP3, GE D.20 link protocol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical Layout\u003c\/td\u003e\n\u003ctd\u003eModular framework with detachable units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eI\/O Density Scaling and Firmware Flash Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe analog scan infrastructure accommodates 32 independent signal lines across a detachable two-unit physical assembly. To scale I\/O density inside a multi-node subsystem cage, the digitized analog registers must pass seamlessly to upstream logic blocks using DNP3 or proprietary D.20 link protocol layers. Maintaining deterministic sample-and-hold update velocities across all 32 channels requires strict alignment with verified firmware flash compatibility matrices running on the master station gateway to prevent addressing conflicts or register latency anomalies.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the detachable modules of the WESDAC D20A be uncoupled while the terminal backplane power is active?\u003c\/p\u003e\n\u003cp\u003eA: No. The inter-module connectors do not feature delayed pre-charge pins. Decoupling the separate physical blocks under active load can create electrical transients that interrupt communication on the active D.20 link loop and cause hardware data faults.\u003c\/p\u003e\n\u003cp\u003eQ: How are individual channel inputs isolated when converting between voltage and current source tracking?\u003c\/p\u003e\n\u003cp\u003eA: Switching channel configurations requires modifying internal physical jumper states on the terminal card alongside matching register settings in the system software. Failure to match hardware jumper locations with software parameter choices will disrupt the analog-to-digital signal verification loop.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog Signal Shield Grounding:\u003c\/strong\u003e Connect all twisted-pair analog signal shields to a single low-impedance ground point at the panel bulkhead enclosure boundary to eliminate common-mode noise across the 32 input paths.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Mechanical Seating:\u003c\/strong\u003e Verify that both modular detachable components are fully seated and that the retention clips are clicked into position before executing system initialization routines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Voltage Cable Segregation:\u003c\/strong\u003e Route all incoming analog current and voltage signal cables through dedicated wire ducts separate from parallel high-voltage AC distribution circuits to prevent electromagnetic induction.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"General Electric","offers":[{"title":"Default Title","offer_id":53115079196981,"sku":"D20 M+SS","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/WESDACD20A.png?v=1783677615","url":"https:\/\/www.5gplc.com\/products\/wesdac-d20a-ge-analog-scan-module","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}