{"product_id":"allen-bradley-1771-iad-plc-5-digital-ac-dc-input-module","title":"Allen-Bradley 1771-IAD PLC 5 Digital AC\/DC Input Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1771-IAD\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as a high-density digital input module within the legacy PLC-5 platform. It bridges the gap between field-side sensors and the processor by converting 120V AC or DC signals into logic-level data. This module supports 16 discrete inputs, providing a space-efficient solution for monitoring switches, pushbuttons, and proximity sensors in rugged industrial environments. We supply this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New and Original\u003c\/strong\u003e, ensuring maximum uptime for your critical control architecture.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe following table outlines the core electrical and physical parameters of the 1771-IAD:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification Details\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eVoltage Category\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e120 Volts AC\/DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Voltage Range\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e79–138 Volts AC\/DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNumber of Inputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e16 Channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBackplane Current\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e195 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eTypical AC Signal Delay (On)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5 (± 3) ms\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eTypical AC Signal Delay (Off)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e25 (± 5) ms\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMax AC Off-State Current\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2.8 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCompatible Wiring Arm\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1771-WH\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.00 lbs (0.45 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDual-Voltage Versatility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1771-IAD handles both AC and DC input signals seamlessly. This flexibility eliminates the need for separate module types when integrating different field device power sources.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRapid Signal Processing:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePrecise hardware filters manage signal delays (typically 5ms for \"On\" states). These filters effectively suppress electrical noise and contact bounce, ensuring the PLC processor receives clean, accurate data.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eChassis Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module installs directly into standard 1771 Universal I\/O chassis (including A1B, A2B, and A4B models). This modularity allows engineers to expand or maintain existing PLC-5 racks without significant mechanical re-work.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSimplified Maintenance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUtilizing the 1771-WH wiring arm allows technicians to replace the module without disconnecting field wires. This design significantly reduces Mean Time to Repair (MTTR) during hardware swaps.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 1771-IAD require a specific wiring arm?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, you must use the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1771-WH\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewiring arm. It secures to the chassis and connects the field wiring to the module's gold-plated backplane connectors, facilitating a \"swing-away\" design for easy maintenance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan this module handle 125V DC signals?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The operating range extends up to 138V DC. However, ensure that your off-state leakage current remains below 2.8mA to prevent the module from registering a \"false on\" signal.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this product factory sealed?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe guarantee that the 1771-IAD is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e. It ships in its original packaging with the factory seal intact, ensuring it meets all original manufacturer performance standards.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the primary difference between AC and DC operation for this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhile the voltage range is identical, the signal delay differs slightly. DC \"On\" delays can be as fast as 3ms, whereas AC \"On\" delays typically average 5ms due to the nature of the sinusoidal waveform.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53459794133176,"sku":"1771-IAD","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1771-IAD.jpg?v=1778659351","url":"https:\/\/www.globalpetroparts.com\/products\/allen-bradley-1771-iad-plc-5-digital-ac-dc-input-module","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}