{"product_id":"allen-bradley-1746-ib8-sinking-input-module","title":"Allen-Bradley 1746-IB8 SLC 500 8-Channel 24V DC Sinking Input Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Allen-Bradley 1746-IB8 is a high-performance digital DC input module designed for use within the SLC 500 programmable logic controller system. This module provides eight (8) current-sinking input channels, allowing the PLC to monitor the status of various field devices such as limit switches, pushbuttons, and proximity sensors. It reliably converts 24V DC field signals into logic-level data for processing by the SLC 500 controller.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEight (8) isolated current-sinking input channels.\u003c\/li\u003e\n\u003cli\u003eNominal operating voltage of 24V DC with an operating range of 10-30V DC.\u003c\/li\u003e\n\u003cli\u003eIntegrated hardware filtering with an 8 ms signal delay to mitigate mechanical contact bounce.\u003c\/li\u003e\n\u003cli\u003eRobust design offering high noise immunity and resistance to shock up to 30G.\u003c\/li\u003e\n\u003cli\u003eBackplane power consumption of 50 mA at 5V DC.\u003c\/li\u003e\n\u003cli\u003e1500V AC isolation between the backplane and the input circuitry.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThe 1746-IB8 is widely utilized in industrial automation environments for discrete signal monitoring. It is commonly deployed in manufacturing lines, material handling systems, and process control applications where reliable detection of binary field device states is required.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\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 Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e8 (Current Sinking)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Input Voltage\u003c\/td\u003e\n\u003ctd\u003e24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e10–30V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-State Voltage (Max)\u003c\/td\u003e\n\u003ctd\u003e5.0V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-State Current (Max)\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 DC)\u003c\/td\u003e\n\u003ctd\u003e50 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e1.3 Watts Total\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003e1500V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the PLC chassis is powered down before inserting or removing the module to prevent electrical damage.\u003c\/li\u003e\n\u003cli\u003eThe 1746-IB8 must be installed in an SLC 500 chassis; ensure the module is fully seated and the retaining screws are tightened to provide a secure ground connection.\u003c\/li\u003e\n\u003cli\u003eUse shielded cabling for input signals to minimize electromagnetic interference (EMI) in high-noise environments.\u003c\/li\u003e\n\u003cli\u003eMaintain proper ventilation within the enclosure to ensure the ambient temperature remains within the 0 to 60 degC operating range.\u003c\/li\u003e\n\u003cli\u003eVerify that field devices are correctly wired for a sinking configuration, where the device sources current to the module input.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eWhat is the primary function of the 1746-IB8 module?\u003c\/h3\u003e\u003cp\u003eThe 1746-IB8 is a digital input module that detects 24V DC signals from field sensors and switches, converting them into digital signals that the SLC 500 processor can interpret.\u003c\/p\u003e\u003ch3\u003eDoes this module require external power for the inputs?\u003c\/h3\u003e\u003cp\u003eYes, the 1746-IB8 requires an external 24V DC power supply to energize the input field devices, as the module itself does not provide power to the sensors.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":50730390978812,"sku":"1746-IB8","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_a24a3f84-c00f-4864-97dc-717865fcafde.jpg?v=1785221881","url":"https:\/\/www.electronicplc.com\/ar\/products\/allen-bradley-1746-ib8-sinking-input-module","provider":"Electronic PLC","version":"1.0","type":"link"}