{"product_id":"allen-bradley-1746-ib16-slc-500-digital-input-module","title":"Allen-Bradley 1746-IB16 SLC 500 Digital Input Module","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1746-IB16\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1746-IB16\u003c\/strong\u003e Digital Input Module, operates as a dedicated hardware component for discrete DC signal processing within Allen-Bradley SLC 500 rack platforms.\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\u003e1746-IB16\u003c\/td\u003e\n\u003c\/tr\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\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\u003e0.88 lbs (0.40 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard SLC 500 Single-Slot Module Width\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e0.25 W (5 VDC backplane draw)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e16 Inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Type\u003c\/td\u003e\n\u003ctd\u003eCurrent Sinking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Category\u003c\/td\u003e\n\u003ctd\u003e24 VDC (10-30 VDC operating range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5 VDC)\u003c\/td\u003e\n\u003ctd\u003e0.05 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (24 VDC)\u003c\/td\u003e\n\u003ctd\u003e0 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Signal Delay\u003c\/td\u003e\n\u003ctd\u003e8 ms (ON\/OFF transition)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Heat Dissipation\u003c\/td\u003e\n\u003ctd\u003e3.6 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Dissipation per Point\u003c\/td\u003e\n\u003ctd\u003e0.2 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Heat Dissipation\u003c\/td\u003e\n\u003ctd\u003e0.425 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Block\u003c\/td\u003e\n\u003ctd\u003eRemovable Terminal Block Included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication Velocity \u0026amp; I\/O Density Scaling\u003c\/h3\u003e\n\u003cp\u003eThe 1746-IB16 interface card maintains deterministic backplane bus communication velocity by scanning 16 discrete channels via backplane logic level transitions at a minimal current draw of 0.05 A at 5 VDC. High I\/O density scaling is achieved through 16 current-sinking input circuits designed for 24 VDC discrete field devices. The module incorporates optoelectronic channel-to-backplane isolation to suppress field-side electromagnetic interference, while limiting maximum signal propagation delays to 8 ms across all channels to optimize real-time controller throughput.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What is the backplane current draw of the 1746-IB16 on the 24 VDC rail?\u003c\/p\u003e\n\u003cp\u003eA: The 1746-IB16 draws 0 A from the 24 VDC backplane bus, relying solely on 0.05 A from the 5 VDC backplane rail to power its internal logic components.\u003c\/p\u003e\n\u003cp\u003eQ: Does the 1746-IB16 module require powering down the rack to change terminal wiring?\u003c\/p\u003e\n\u003cp\u003eA: No, the module includes a removable terminal block (RTB) that allows field wiring to be disconnected and serviced without altering the physical backplane slot alignment or backplane connector integrity.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAlign the circuit board with the top and bottom chassis card guides, pushing the module firmly into the vacant SLC 500 slot until the securing latches click.\u003c\/li\u003e\n\u003cli\u003eWire field input devices to the removable terminal block observing correct polarity for current-sinking circuits (+24 VDC common to field devices, module terminal acting as current path to ground).\u003c\/li\u003e\n\u003cli\u003eEnsure signal wiring is physically separated from high-voltage AC lines and motor leads to prevent inductively coupled transient noise from causing erratic input transitions.\u003c\/li\u003e\n\u003cli\u003eVerify that field supply wiring stays strictly within the 10-30 VDC operating threshold to prevent premature thermal stress or input channel degradation.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48793742016702,"sku":null,"price":80.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/1746-N2_df72307b-2e06-48ce-9aff-cac3db450985.png?v=1787881224","url":"https:\/\/www.autooiltech.com\/products\/allen-bradley-1746-ib16-slc-500-digital-input-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}