{"product_id":"allen-bradley-1746-iv8-slc-500-dc-input-module","title":"Allen-Bradley 1746-IV8 SLC 500 8-Channel 24V DC Sourcing Input Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Allen-Bradley 1746-IV8 is a high-performance discrete DC input module engineered for the SLC 500 programmable controller series. This module provides eight (8) current-sourcing input channels, designed to interface seamlessly with sinking (NPN) field devices such as proximity sensors, limit switches, and pushbuttons. It serves as a critical bridge between industrial field signals and the SLC 500 processor, ensuring reliable data acquisition in demanding automation environments.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEight (8) independent current-sourcing input channels.\u003c\/li\u003e\n\u003cli\u003eNominal operating voltage of 24V DC, compatible with a wide 10-30V DC range.\u003c\/li\u003e\n\u003cli\u003eIntegrated status LEDs for each channel, providing real-time visual diagnostics.\u003c\/li\u003e\n\u003cli\u003eStandard 8 ms signal delay for both ON and OFF transitions to mitigate signal noise and contact bounce.\u003c\/li\u003e\n\u003cli\u003eCompact, modular design specifically for SLC 500 I\/O chassis mounting.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThe 1746-IV8 is widely utilized in factory automation, process control, and machine monitoring systems. It is ideal for applications requiring the integration of multiple DC-powered field devices into a centralized control architecture, including conveyor control, assembly line monitoring, and safety-interlocked machine operation.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Line\u003c\/td\u003e\n\u003ctd\u003eSLC 500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eDigital DC Input (Sourcing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e8 (1 group of 8)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range\u003c\/td\u003e\n\u003ctd\u003e10-30V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Off-State Voltage\u003c\/td\u003e\n\u003ctd\u003e5.0V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Off-State Current\u003c\/td\u003e\n\u003ctd\u003e1 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Input Current\u003c\/td\u003e\n\u003ctd\u003e8 mA @ 24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5V)\u003c\/td\u003e\n\u003ctd\u003e50 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Delay\u003c\/td\u003e\n\u003ctd\u003e8 ms (ON\/OFF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 degC (32 to 140 degF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the SLC 500 chassis power is disconnected before installing or removing the module.\u003c\/li\u003e\n\u003cli\u003eAlign the module carefully with the chassis slot guides to prevent damage to the backplane connector.\u003c\/li\u003e\n\u003cli\u003eSecure the module using the top and bottom retaining screws to ensure proper grounding and mechanical stability.\u003c\/li\u003e\n\u003cli\u003eRoute signal wiring away from high-voltage AC lines and high-EMI sources to prevent signal interference.\u003c\/li\u003e\n\u003cli\u003eUse shielded cabling for long runs to maintain signal integrity.\u003c\/li\u003e\n\u003cli\u003eVerify that field device polarity matches the sourcing configuration of the module (NPN\/sinking devices).\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eWhat is the primary function of the 1746-IV8?\u003c\/h3\u003e\u003cp\u003eThe 1746-IV8 is a digital input module that detects 24V DC signals from field devices and converts them into logic levels for the SLC 500 PLC processor.\u003c\/p\u003e\u003ch3\u003eIs this module compatible with sinking field devices?\u003c\/h3\u003e\u003cp\u003eYes, the 1746-IV8 is a current-sourcing module, which means it is designed to work with sinking (NPN) field devices.\u003c\/p\u003e\u003ch3\u003eWhat does the 8 ms signal delay do?\u003c\/h3\u003e\u003cp\u003eThe 8 ms delay acts as a hardware filter, preventing the PLC from registering false triggers caused by electrical noise or mechanical contact bounce in field switches.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":50734015840508,"sku":"1746-IV8","price":93.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_f87f5a76-ccf8-4233-a393-08d62306827a.jpg?v=1785292853","url":"https:\/\/www.electronicplc.com\/es\/products\/allen-bradley-1746-iv8-slc-500-dc-input-module","provider":"Electronic PLC","version":"1.0","type":"link"}