{"product_id":"ge-8121-di-dc-discrete-input-module","title":"GE 8121-DI-DC Discrete Input Module","description":"\u003cp\u003eThe \u003cstrong\u003eGE 8121-DI-DC\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e8121-DI-DC\u003c\/strong\u003e 16-Channel Discrete Input Module, operates as a dedicated hardware component for multi-channel binary signal acquisition and pulse counting within PAC8000 distributed control architecture networks.\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\u003e8121-DI-DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGE\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\u003e0.21 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e42 mm module width\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e90 mA typ. \/ 135 mA max. (Railbus 12V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Channels\u003c\/td\u003e\n\u003ctd\u003e16 channels, non-isolated, module-powered\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOFF Current\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.3 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eON Current\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 1.2 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWetting Current\u003c\/td\u003e\n\u003ctd\u003e2.8 mA typ.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProfinet \/ EtherNet\/IP deterministic networks\u003c\/h3\u003e\n\u003cp\u003eThe module integrates standardized backplane communication velocity protocols and deterministic network interfacing designed for real-time process monitoring environments. Signal routing relies on high-speed internal bus transceivers engineered to minimize propagation delay across multi-rack Railbus topologies. Diagnostic telemetry monitors internal rail voltages, input threshold states, and communication frame error rates continuously to maintain loop integrity.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What is the maximum pulse counting frequency supported when input debounce filtering is disabled?\u003c\/p\u003e\n\u003cp\u003eA: The module supports a maximum input frequency of up to 100 Hz in pulse counting mode when configured without debounce filtering.\u003c\/p\u003e\n\u003cp\u003eQ: What are the electrical isolation ratings between the field input channels and the internal Railbus?\u003c\/p\u003e\n\u003cp\u003eA: The non-isolated channel architecture provides an electrical isolation rating of 250 V ac from any channel to the Railbus.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the module securely into the designated PAC8000 carrier backplane slot, ensuring proper edge connector alignment and mechanical latching.\u003c\/li\u003e\n\u003cli\u003eVerify that field wiring connected to the terminal blocks adheres to FM non-incendive parameters for safe operation in classified environments.\u003c\/li\u003e\n\u003cli\u003eRoute discrete input signal cables separately from high-voltage AC power conduits and motor leads to eliminate electromagnetic interference (EMI).\u003c\/li\u003e\n\u003cli\u003eCheck that cabinet ventilation maintains operating ambient temperatures within specified thermal limits to prevent electronic drift.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GE FANUC","offers":[{"title":"Default Title","offer_id":52672206176568,"sku":"8121-DI-DC","price":220.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0893\/1616\/3896\/files\/8121-DI-DC.jpg?v=1784621293","url":"https:\/\/www.automodulexpert.com\/products\/ge-8121-di-dc-discrete-input-module","provider":"AutoModuleXpert Ltd.","version":"1.0","type":"link"}