{"product_id":"allen-bradley-1756-ia8d-controllogix-digital-ac-input-module","title":"Allen-Bradley 1756-IA8D ControlLogix Digital AC Input Module","description":"\u003cp\u003eThe Allen-Bradley \u003cstrong\u003e1756-IA8D\u003c\/strong\u003e is a ControlLogix digital AC input module designed for industrial automation architectures. Featuring 8 diagnostic input points operating across a 79-132 VAC range, this open-style chassis-mount module delivers advanced point-level diagnostics and reliable signal processing for 120V AC applications. It utilizes a 20-pin removable terminal block to ensure secure field-side connections and seamless system integration within harsh operational environments.\u003c\/p\u003e\n\u003ch3\u003eFunctional Overview and Diagnostics\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1756-IA8D\u003c\/strong\u003e module provides eight diagnostic input points configured in two groups of four points each. The integrated field-side diagnostics monitor channel-level conditions, including open-wire faults and loss of power, ensuring enhanced visibility and rapid troubleshooting during operational anomalies.\u003c\/p\u003e\n\u003ch3\u003eElectrical and Timing Specifications\u003c\/h3\u003e\n\u003cp\u003eThis module operates on a nominal 120V AC input voltage with an operating range of 79 to 132 VAC at 47 to 63 Hz. It features user-selectable input filter times of 1 ms or 2 ms for off-to-on transitions, and 9 ms or 18 ms for on-to-off transitions, allowing users to tune noise immunity and response speed.\u003c\/p\u003e\n\u003ch3\u003eInstallation and Chassis Mounting\u003c\/h3\u003e\n\u003cp\u003eDesigned for standard ControlLogix chassis mounting, the unit requires an open-style enclosure layout with proper thermal consideration for a maximum power dissipation of 4.5 W at 60 deg C. It interfaces with field wiring via compatible 20-pin removable terminal blocks such as the 1756-TBNH or 1756-TBSH.\u003c\/p\u003e\n\u003ch3\u003eTechnical Parameters\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\u003e1756-IA8D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley (Rockwell Automation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eDigital AC Input Module with Diagnostics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e8 points (4 points per group)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Category\u003c\/td\u003e\n\u003ctd\u003e120V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e79-132 VAC, 47-63 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Power Consumption\u003c\/td\u003e\n\u003ctd\u003e0.58 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation, Max\u003c\/td\u003e\n\u003ctd\u003e4.5 W at 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminals\u003c\/td\u003e\n\u003ctd\u003e20 Pin (Removable Terminal Block)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Type\u003c\/td\u003e\n\u003ctd\u003eOpen Style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eChassis Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.50 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003eFrequently Asked Questions\u003c\/p\u003e\n\u003cp\u003eQ: What RTB types are compatible with the 1756-IA8D module? A: The module accommodates standard 20-pin removable terminal blocks, specifically the 1756-TBNH and 1756-TBSH housing variants, to secure field-side wiring.\u003c\/p\u003e\n\u003cp\u003eQ: How do the diagnostic functions detect faults? A: Point-level diagnostics monitor conditions like open wires and loss of power, transmitting status data back to the ControlLogix processor for active alarm generation and quick troubleshooting.\u003c\/p\u003e\n\u003cp\u003eQ: Can this module operate in hazardous industrial locations? A: Yes, it carries cULus certification for Class I, Division 2 hazardous locations, alongside CE, RCM, and marine compliance standards when installed per specifications.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":67156276412531,"sku":"1756-IA8D","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/1756-OX8I_1__Cocoai_4e8765d7-6044-45c5-84a4-fe6db1992ed3.jpg?v=1794289523","url":"https:\/\/www.dcssupplier.com\/products\/allen-bradley-1756-ia8d-controllogix-digital-ac-input-module","provider":"DcsSupplier Limited","version":"1.0","type":"link"}