{"product_id":"allen-bradley-1746-io8-combination-input-output-module-slc-500","title":"Allen-Bradley 1746-IO8 Combination Input\/Output Module SLC 500","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1746-IO8\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1746IO8\u003c\/strong\u003e Digital I\/O Cards, operates as a dedicated hardware component for discrete signal acquisition and relay switching within programmable logic controller networks.\u003c\/p\u003e\n\u003ch3\u003ePart Nomenclature and Catalog Mapping\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1746-IO8: Primary catalog designation for the combination module\u003c\/li\u003e\n\u003cli\u003e1746IO8: Standard manufacturer part string without separator hyphens\u003c\/li\u003e\n\u003cli\u003e1746-IO8\/: Alternative revision suffix marker for alternate stock tracing\u003c\/li\u003e\n\u003c\/ul\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-IO8\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\u003e0.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e14 cm x 13 cm x 3.3 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to +60 deg C (standard industrial enclosure range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eBackplane current draw sourced from chassis power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e85 Volts AC to 132 Volts AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Configuration\u003c\/td\u003e\n\u003ctd\u003e4 inputs and 4 relay outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Delay\u003c\/td\u003e\n\u003ctd\u003e35 milliseconds to 45 milliseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current Capacity\u003c\/td\u003e\n\u003ctd\u003e1.2 amps at 24 VDC per output point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Network Velocity and I\/O Scaling\u003c\/h3\u003e\n\u003cp\u003eThe module communicates via the SLC 500 backplane bus communication velocity framework, establishing deterministic data transfer intervals between the physical terminals and the central processing unit. Backplane bus communication velocity handles discrete state updates within fixed scan cycles, preserving loop timing synchronization across distributed rack expansions. I\/O density scaling allows seamless integration alongside specialized analog and communication modules without violating backplane current loading limits or introducing protocol conversion latencies. Firmware flash compatibility is managed through system software tools to maintain baseline operational stability across revision changes.\u003c\/p\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Allen-Bradley 1746-IO8 Combination Input\/Output Module\u003c\/li\u003e\n\u003cli\u003e1 x Removable Field Wiring Terminal Block Block\u003c\/li\u003e\n\u003cli\u003e1 x Technical Hardware Reference Leaflet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePhysical Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eChassis Slot Insertion\n\u003cul\u003e\n\u003cli\u003eEnsure system rack power is fully isolated before mounting or dismounting the module to prevent backplane bus damage.\u003c\/li\u003e\n\u003cli\u003eAlign the circuit board evenly with the internal chassis guide rails and push firmly until the locking latches snap into position.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eField Wiring Terminations\n\u003cul\u003e\n\u003cli\u003eStrip field conductors to recommended lengths and insert them securely into the removable terminal block screw terminals.\u003c\/li\u003e\n\u003cli\u003eVerify that high-voltage AC input lines are separated from low-voltage control loops to reduce electromagnetic interference.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Technical Inquiries\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eQ: What is the total channel breakdown provided by this module?\u003c\/li\u003e\n\u003cli\u003eA: The unit provides 4 discrete inputs and 4 relay outputs.\u003c\/li\u003e\n\u003cli\u003eQ: What is the specified operating voltage range for the input channels?\u003c\/li\u003e\n\u003cli\u003eA: The input circuits operate within a range of 85 Volts AC to 132 Volts AC.\u003c\/li\u003e\n\u003cli\u003eQ: What is the signal delay timing for input and output state changes?\u003c\/li\u003e\n\u003cli\u003eA: The signal delay spans between 35 milliseconds and 45 milliseconds.\u003c\/li\u003e\n\u003cli\u003eQ: What is the maximum current rating per output point at 24 VDC?\u003c\/li\u003e\n\u003cli\u003eA: Each output point delivers up to 1.2 amps at 24 VDC.\u003c\/li\u003e\n\u003cli\u003eQ: Does this hardware component support live hot-swapping inside an active rack?\u003c\/li\u003e\n\u003cli\u003eA: No, power must be cut from the chassis backplane prior to inserting or removing the module.\u003c\/li\u003e\n\u003cli\u003eQ: What are the physical dimensions of the shipping package?\u003c\/li\u003e\n\u003cli\u003eA: The shipping dimensions measure 14 cm x 13 cm x 3.3 cm.\u003c\/li\u003e\n\u003cli\u003eQ: How much does the packaged hardware unit weigh?\u003c\/li\u003e\n\u003cli\u003eA: The total unit weight is 0.2 kg.\u003c\/li\u003e\n\u003cli\u003eQ: Why is proper grounding important for the terminal wiring?\u003c\/li\u003e\n\u003cli\u003eA: Proper grounding prevents ground loops and suppresses electrical noise from disrupting digital signal integrity.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066404950189,"sku":"1746-IO8","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1746-IO8_13.jpg?v=1785145518","url":"https:\/\/www.maxwellplc.com\/ru\/products\/allen-bradley-1746-io8-combination-input-output-module-slc-500","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}