{"product_id":"allen-bradley-1769-ia8i-compactlogix-8-point-d-i-module","title":"Allen Bradley 1769-IA8I Compactlogix 8-Point D\/I Module","description":"\u003cdiv class=\"flex max-w-full flex-col flex-grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"13b2d554-bcf9-445c-a559-1a80a8082a3c\" dir=\"auto\" class=\"min-h-8 text-message flex w-full flex-col items-end gap-2 whitespace-normal break-words text-start [.text-message+\u0026amp;]:mt-5\" data-message-model-slug=\"gpt-4o\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[3px]\"\u003e\n\u003cdiv class=\"markdown prose w-full break-words dark:prose-invert light\"\u003e\n\u003cp\u003e\u003cstrong\u003eAllen Bradley 1769‑IA8I CompactLogix Digital Input Module\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen Bradley 1769‑IA8I\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1769‑IA8I\u003c\/strong\u003e digital input module, operates as a dedicated hardware component for AC signal acquisition within CompactLogix and 1769 I\/O networks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHardware Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e1769‑IA8I\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eAllen Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e270 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e118 x 35 x 87 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e90 mA @ 5.1 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eInput Type\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e8 individually isolated AC inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eVoltage Category\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e100\/120 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eOperating Voltage Range\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e79–132 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eFrequency Range\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e47–63 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eInput Delay (On\/Off)\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e20 ms \/ 20 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eOff‑state Voltage (Max)\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e20 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eOff‑state Current (Max)\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e2.5 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eOn‑state Voltage (Min)\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e79 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eOn‑state Current\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e5 mA @ 74 V AC (min), 12 mA @ 120 V AC (max)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eInrush Current (Max)\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e250 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e12 kΩ @ 50 Hz, 10 kΩ @ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eIsolation Voltage\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e1517 V AC or 2145 V DC for 1 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eWorking Voltage\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e132 V AC (IEC Class II reinforced insulation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eDIN rail or panel mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eSlot Width\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003ePower Supply Compatibility\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e1769‑PA2, 1769‑PB2, 1769‑PA4, 1769‑PB4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eDistance Rating\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e8 modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eTerminal Screw Torque\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e0.68 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eRetaining Screw Torque\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e0.46 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eWire Size\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e22–14 AWG solid, 22–16 AWG stranded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eWire Type\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eCu‑90 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eReplacement Terminal Block\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e1769‑RTBN18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eReplacement Door Label\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e1769‑RL1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eReplacement Door\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e1769‑RD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eEnclosure Type Rating\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eNone (open‑style)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003e\u003cstrong\u003eBackplane Bus Communication Velocity and Firmware Flash Compatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWithin CompactLogix architectures, the 1769‑IA8I adheres to deterministic backplane scheduling rules that govern input update timing. Each AC input channel is sampled according to fixed bus cycles, ensuring predictable propagation of state changes to the controller scan. Firmware flash compatibility is maintained through revision‑matched profiles, preventing initialization faults during module power‑up. I\/O density scaling is supported through the 1769 platform’s distance rating, allowing up to eight modules from the power supply without degrading bus timing or input latching behavior.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the 1769‑IA8I be hot‑swapped?\u003c\/strong\u003e A: No. The module must be inserted or removed only when the CompactLogix or 1769 I\/O system is de‑energized to avoid undefined input states.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does each input channel have electrical isolation?\u003c\/strong\u003e A: Yes. All eight input points are individually isolated, allowing independent AC signal acquisition.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are firmware mismatches possible during installation?\u003c\/strong\u003e A: Yes. The controller requires a matching module profile; mismatched firmware may prevent correct initialization or input scaling.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eField Installation Guidelines\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEnsure the system is de‑energized before installing or removing the module.\u003c\/li\u003e\n\u003cli\u003eRoute AC input wiring separately from low‑level analog or communication conductors to reduce noise coupling.\u003c\/li\u003e\n\u003cli\u003eMaintain proper torque on terminal and retaining screws to ensure mechanical stability.\u003c\/li\u003e\n\u003cli\u003eUse copper conductors rated at 90 deg C and verify insulation stripping lengths before termination.\u003c\/li\u003e\n\u003cli\u003eConfirm the module’s placement within the eight‑module distance rating from the power supply.\u003c\/li\u003e\n\u003cli\u003eValidate input state transitions after commissioning to ensure correct on\/off delay behavior.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43809215316042,"sku":"1769-IA8I","price":320.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/8569\/3770\/files\/1769-OW16_1.jpg?v=1743411288","url":"https:\/\/www.topbrandsplc.com\/products\/allen-bradley-1769-ia8i-compactlogix-8-point-d-i-module","provider":"Topbrands PLC Limited","version":"1.0","type":"link"}