{"product_id":"ge-wesdac-d20-c-analog-digital-i-o-module","title":"GE WESDAC D20 C Analog Digital I\/O Module","description":"\u003cp\u003eConfigured for analog data acquisition and discrete relay control execution in electrical substation automation platforms, the \u003cstrong\u003eGE WESDAC D20 C\u003c\/strong\u003e (\u003cstrong\u003eGE D20C\u003c\/strong\u003e Analog Digital I\/O Module) provides direct physical\/electrical execution. The hardware integrates localized multi-channel monitoring and command-relay routing within a single distributed architecture node, maintaining deterministic processing intervals across all configured internal circuits.\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 D20 C (D20C)\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\u003e2.5 kg (Approximate based on physical frame assembly)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e19.0\" x 5.25\" x 2.5\" (Standard 19-inch rackmount width)\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 (Standard industrial substation rating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e5 W typical (20-60 VDC range), 11 W maximum with 24 VDC contact wetting active\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcessor Type\u003c\/td\u003e\n\u003ctd\u003e8-bit Freescale 68HC11 MPU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClock Speed\u003c\/td\u003e\n\u003ctd\u003e2 MHz MPU clock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOnboard Memory\u003c\/td\u003e\n\u003ctd\u003e24 KB EPROM, 32 KB static RAM, 512 bytes EEPROM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Inputs\u003c\/td\u003e\n\u003ctd\u003e16 bipolar, differential inputs via plug-in daughter board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-0.05% for voltage configurations, +\/-0.1% for current configurations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Drift\u003c\/td\u003e\n\u003ctd\u003e+\/-10 ppm per deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eADC Resolution\u003c\/td\u003e\n\u003ctd\u003e14 bits plus sign bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScan Conversion Rate\u003c\/td\u003e\n\u003ctd\u003e275 ms for 16 inputs @ 60 Hz line filter, 328 ms for 16 inputs @ 50 Hz line filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDynamic Input Range\u003c\/td\u003e\n\u003ctd\u003e125% of normalized full-scale inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Outputs\u003c\/td\u003e\n\u003ctd\u003e8 interposing relays plus 2 Master Trip\/Close relays, or 8 isolated Form C contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Switching Rating\u003c\/td\u003e\n\u003ctd\u003e60 W maximum, 3 A maximum, 220 VDC maximum (single Form-C or -A contact)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Duration Control\u003c\/td\u003e\n\u003ctd\u003eProgrammable 1 to 215 ms (1 ms intervals) or 1 to 215 s (1 s intervals)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoil Integrity Check\u003c\/td\u003e\n\u003ctd\u003eContinuous status loop verification executed every 500 microseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Isolation Rating\u003c\/td\u003e\n\u003ctd\u003e1500 Vrms component isolation, 1000 VDC dielectric rating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Communication\u003c\/td\u003e\n\u003ctd\u003e2 dedicated D.20 Link ports, 1 local RS-232 maintenance port at 9600 baud\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLocal Interface\u003c\/td\u003e\n\u003ctd\u003ePhysical toggle switch for local enable\/disable authorization\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIndustrial Control \u0026amp; Firmware Flash Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe architectural interface relies on low-latency backplane bus execution profiles synchronized directly with the Freescale MPU pipeline. Field deployment requires absolute verification of firmware flash compatibility versions when linking the sub-assembly to the primary D20 processor node. Operating parameters dictate that EEPROM allocation memory must match the system image map to preserve local calibration curves during hot-swap recovery cycles. If firmware revisions deviate from the core processing unit base level, communications across the dual D.20 Link ports will drop packets, triggering a hardware-driven local lockout state.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the local enable\/disable switch alter the physical command state of the control relays?\u003c\/p\u003e\n\u003cp\u003eA: The physical toggle switch acts as a hardware-level interlock that isolates the drive coils of the 8 control relays and the 2 Master Trip\/Close relays from the internal logic. When toggled to the disable position, it prevents all remote execution commands from activating the output circuits, providing an absolute safety break for local physical maintenance.\u003c\/p\u003e\n\u003cp\u003eQ: What is the mechanical and electrical isolation threshold between the analog processing electronics and the field wiring terminations?\u003c\/p\u003e\n\u003cp\u003eA: The module incorporates optocouplers and magnetic transformers providing a component isolation rating of 1500 Vrms and a dielectric breakdown limit of 1000 VDC. This prevents high-voltage transient surges originating on external 4-20 mA or voltage loops from cross-propagating into the internal 8-bit MPU logic bus.\u003c\/p\u003e\n\u003cp\u003eQ: How does the hardware handle scanning cycles if the grid frequency fluctuates between 50 Hz and 60 Hz?\u003c\/p\u003e\n\u003cp\u003eA: The analog-to-digital converter relies on fixed hardware integration filters tailored to the line frequency. If configured for 60 Hz, the execution time for all 16 differential channels requires exactly 275 ms; if configured for 50 Hz, the integration window expands to 328 ms to suppress ambient line noise. Discrepancies between physical frequency and software filter settings degrade accuracy margins beyond the stated specifications.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRack Mounting \u0026amp; Thermal Dissipation\u003c\/strong\u003e: The unit must be secured within a standard 19-inch electronic enclosure using high-tensile machine screws. Maintain a minimum of 1U (44.45 mm) structural clearance above and below the assembly frame to permit unrestricted natural convection cooling across the internal daughterboard heat sinks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField Wiring and Shielding Terminations\u003c\/strong\u003e: All analog differential signals must be routed using twisted-pair cables with overall braided foil shields. Ground all shield tails exclusively at the master substation terminal ground busbar; do not daisy-chain shields or ground them at both ends to eliminate ground loop current injection into the 14-bit ADC stage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelay Contact Arc Suppression\u003c\/strong\u003e: For inductive DC loads connected to the Form C output relays, external flyback diodes must be reverse-biased across the external load terminal points. Failure to deploy suppression will induce high-voltage arcing during contact break sequences, accelerating mechanical pitting and degrading the 60 W maximum switching limit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Input Grounding\u003c\/strong\u003e: The 20-60 VDC primary power supply lines must be routed through a dedicated circuit breaker. Connect the chassis ground terminal directly to the panel frame using a low-impedance copper conductor with a minimum cross-sectional area of 2.5 mm squared.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"General Electric","offers":[{"title":"Default Title","offer_id":53124018962741,"sku":"WESDAC D20C","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/WESDACD20C.png?v=1783932454","url":"https:\/\/www.5gplc.com\/products\/ge-wesdac-d20-c-analog-digital-i-o-module","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}