{"product_id":"allen-bradley-1771-iad-industrial-automation-module-heavy-duty","title":"Allen-Bradley 1771-IAD Industrial Automation Module - Heavy-Duty","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1771-IAD is a discrete input module designed for the 1771 family of Programmable Logic Controllers (PLCs). It accepts both AC and DC signal voltages, including 120VAC at 50\/60 Hz and 125VDC. With sixteen (16) input channels, it interfaces seamlessly with discrete devices such as pushbuttons, switches, relay contacts, and contactors.\u003c\/p\u003e\u003cp\u003ePart of the 1771 product bulletin, the 1771-IAD is compatible with a variety of 1771 chassis, including 1771-A1B, A2B, A3B, A3B1, A4B, 1771-AM1, and AM2. Its modular design and field wiring arm simplify installation and maintenance, making it a practical choice for expanding input capacity in existing control systems.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1771-IAD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eDigital AC\/DC Input Module\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\u003eVoltage Category\u003c\/td\u003e\n\u003ctd\u003e120 Volts AC\/DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAC Operating Voltage\u003c\/td\u003e\n\u003ctd\u003e79-138 Volts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC Operating Voltage\u003c\/td\u003e\n\u003ctd\u003e79-138 Volts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical AC Signal Delay (On)\u003c\/td\u003e\n\u003ctd\u003e5 (+\/- 3) ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical DC Signal Delay (On)\u003c\/td\u003e\n\u003ctd\u003e3 (+\/- 0.1) or 10 (+\/- 1) ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical AC Signal Delay (Off)\u003c\/td\u003e\n\u003ctd\u003e25 (+\/- 5) ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical DC Signal Delay (Off)\u003c\/td\u003e\n\u003ctd\u003e25 (+\/- 5) ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax AC Off-State Current\u003c\/td\u003e\n\u003ctd\u003e2.8 Miliamperes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e195 Miliamperes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring Arm\u003c\/td\u003e\n\u003ctd\u003e1771-WH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e3.5 x 6.5 x 2.0 in (89 x 165 x 51 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e16 input channels\u003c\/strong\u003e for monitoring a wide range of discrete field devices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile voltage range\u003c\/strong\u003e of 79-138V AC\/DC enables use in both AC and DC control circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable signal delays\u003c\/strong\u003e allow tuning response times to match application requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField wiring arm (1771-WH)\u003c\/strong\u003e simplifies wiring replacement without disconnecting field wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane current draw of 195 mA\u003c\/strong\u003e ensures reliable communication with the PLC processor.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eIndustry Applications\u003c\/h2\u003e\u003cp\u003eThe 1771-IAD excels in industrial environments where reliable discrete input monitoring is critical. Typical applications include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing lines:\u003c\/strong\u003e Monitor pushbuttons and limit switches to control machine sequencing and safety interlocks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial handling:\u003c\/strong\u003e Interface with proximity sensors and conveyor status contacts for automated sorting and routing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess control:\u003c\/strong\u003e Capture auxiliary contacts from relays and contactors to verify equipment status in chemical or food processing plants.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation \u0026amp; Setup\u003c\/h2\u003e\u003cp\u003eWhen installing the 1771-IAD, select a compatible 1771 chassis (A1B through A4B, AM1, AM2). The module requires keying bands set between pins 10 and 12 or 14 and 16 to ensure correct slot placement. Attach the 1771-WH wiring arm to connect field wiring; this removable terminal block simplifies replacement and maintenance. Always power down the chassis before insertion to avoid damage.\u003c\/p\u003e\u003ch2\u003eMaintenance \u0026amp; Reliability\u003c\/h2\u003e\u003cp\u003eThe 1771-IAD is built for long service life with optoelectrical isolation that protects circuits from electrical transients. Its input filtering reduces electrical noise, enhancing reliability in industrial settings. Routine inspection of the wiring arm and status indicators—1 green active LED and 16 red channel LEDs—helps detect issues early. Periodic cleaning of the module and chassis vents prevents dust buildup that could affect heat dissipation.\u003c\/p\u003e\u003ch2\u003eCompatibility \u0026amp; Integration\u003c\/h2\u003e\u003cp\u003eThis module is compatible with all 1771 I\/O chassis and works with PLC-5 processors. It supports ½, 1, and 2-slot I\/O addressing, offering flexibility in system configuration. The 1771-IAD is a Series D module, ensuring broad compatibility within the 1771 family.\u003c\/p\u003e\u003ch2\u003eSelection Guide \u0026amp; Purchasing Advice\u003c\/h2\u003e\u003cp\u003eBefore purchasing the Allen-Bradley 1771-IAD, verify your chassis model and required input voltage (120V AC\/DC). Confirm the number of inputs needed and whether the 1771-WH wiring arm is included or must be ordered separately. PLC Source PRO offers genuine 1771-IAD modules with fast shipping and competitive pricing, backed by industry expertise.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default","offer_id":44438768287843,"sku":"1771-IAD","price":217.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/1771-A3B1_282_29_7927008e-7b6b-4545-9364-109a54b068b6.jpg?v=1785849756","url":"https:\/\/www.plcsourcepro.com\/ar\/products\/allen-bradley-1771-iad-industrial-automation-module-heavy-duty","provider":"PLC Source PRO","version":"1.0","type":"link"}