{"product_id":"1771-iad-ab-1771-series-120v-ac-dc-input-module","title":"1771-IAD AB 1771 Series 120V AC\/DC Input Module","description":"\u003ch3 style=\"font-weight: bold; margin-bottom: 15px;\"\u003eAllen-Bradley 1771-IAD Digital Input Module | Global PLC Spare HUB\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley\u003c\/strong\u003e \u003cstrong\u003e1771-IAD\u003c\/strong\u003e is a high-performance discrete input module engineered for industrial automation environments. As part of the robust \u003cstrong\u003e1771\u003c\/strong\u003e series, this digital AC\/DC input module handles sixteen channels of 120VAC or 125VDC signals. Engineers deploy the \u003cstrong\u003e1771-IAD\u003c\/strong\u003e to bridge field-level control devices with \u003cstrong\u003ePLC-5\u003c\/strong\u003e controllers seamlessly. Global PLC Spare HUB delivers this component with strict quality standards to ensure plant uptime.\u003c\/p\u003e\n\n\u003ch3 style=\"font-weight: bold; margin-top: 20px; margin-bottom: 15px;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 15px;\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e \u003cstrong\u003eAllen-Bradley\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Rockwell Automation \/ \u003cstrong\u003eAllen-Bradley\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePart Number\/Catalog No.:\u003c\/strong\u003e \u003cstrong\u003e1771-IAD\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e \u003cstrong\u003e1771\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eModule Type:\u003c\/strong\u003e Digital AC\/DC Input Module\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNumber of Inputs:\u003c\/strong\u003e 16 input channels\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOperating Voltage Range:\u003c\/strong\u003e 79 to 138V AC\/DC\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVoltage Category:\u003c\/strong\u003e 120 Volts AC\/DC\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 50\/60 Hz\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSignal Delay (On-State):\u003c\/strong\u003e AC: 5ms or 20ms; DC: 3ms or 10ms\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSignal Delay (Off-State):\u003c\/strong\u003e 25 ms for AC and DC\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMax Off-State Current:\u003c\/strong\u003e 3mA for AC, 0.8mA for DC\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBackplane Current Load:\u003c\/strong\u003e 195 mA at 5V DC\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePower Dissipation:\u003c\/strong\u003e Maximum 8.8 Watts, Minimum 1.0 Watts\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eThermal Dissipation:\u003c\/strong\u003e Maximum 30.1 BTU\/hr, Minimum 3.42 BTU\/hr\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOperating Temperature Range:\u003c\/strong\u003e Standard industrial panel limits\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInterference Resistance:\u003c\/strong\u003e Built-in optoelectrical isolation and input filtering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"font-weight: bold; margin-top: 20px; margin-bottom: 15px;\"\u003eCompatibility \u0026amp; Installation Guide\u003c\/h3\u003e\n\u003cul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 15px;\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCompatible Chassis:\u003c\/strong\u003e \u003cstrong\u003e1771-A1B\u003c\/strong\u003e, \u003cstrong\u003eA2B\u003c\/strong\u003e, \u003cstrong\u003eA3B\u003c\/strong\u003e, \u003cstrong\u003eA3B1\u003c\/strong\u003e, \u003cstrong\u003eA4B\u003c\/strong\u003e, \u003cstrong\u003e1771-AM1\u003c\/strong\u003e, and \u003cstrong\u003eAM2\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSlot Addressing:\u003c\/strong\u003e Supports half-slot, 1-slot, and 2-slot I\/O addressing modes\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKeying Position:\u003c\/strong\u003e Upper connector between pins 14 and 16; lower connector between pins 10 and 12\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eField Wiring Arm:\u003c\/strong\u003e \u003cstrong\u003e1771-WH\u003c\/strong\u003e terminal block for modular wiring\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"font-weight: bold; margin-top: 20px; margin-bottom: 15px;\"\u003eCommissioning, Maintenance \u0026amp; Diagnostics\u003c\/h3\u003e\n\u003cul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 15px;\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStatus Indicators:\u003c\/strong\u003e Features 1 green module active LED and 16 red channel status lights\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaintenance Ease:\u003c\/strong\u003e Removable \u003cstrong\u003e1771-WH\u003c\/strong\u003e wiring arm allows module replacement without detaching field wires\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNoise Suppression:\u003c\/strong\u003e Integrated input filters eliminate electrical transients in harsh factory floors\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"font-weight: bold; margin-top: 20px; margin-bottom: 15px;\"\u003eTypical Applications \u0026amp; Operating Scenarios\u003c\/h3\u003e\n\u003cul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 15px;\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDiscrete Monitoring:\u003c\/strong\u003e Interfaces pushbuttons, limit switches, and selector switches\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStatus Tracking:\u003c\/strong\u003e Connects auxiliary contacts from heavy-duty motor starters and control relays\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAlarm Systems:\u003c\/strong\u003e Integrates pilot lights and annunciator panels into the main control loop\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"font-weight: bold; margin-top: 20px; margin-bottom: 15px;\"\u003eLogistics, Packaging \u0026amp; Warranty\u003c\/h3\u003e\n\u003cul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 15px;\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eShipping Carriers:\u003c\/strong\u003e Fast dispatch via FedEx, UPS, and DHL\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHandling Time:\u003c\/strong\u003e Dispatched within 24 to 48 hours of order confirmation\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePackage Contents:\u003c\/strong\u003e One \u003cstrong\u003e1771-IAD\u003c\/strong\u003e module and one \u003cstrong\u003e1771-WH\u003c\/strong\u003e wiring arm\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWarranty Terms:\u003c\/strong\u003e Comprehensive 12-month warranty coverage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"font-weight: bold; margin-top: 20px; margin-bottom: 15px;\"\u003eGlobal PLC Spare HUB's Insight\u003c\/h3\u003e\n\u003cp\u003eGlobal PLC Spare HUB technical specialists note that improper keying during installation is a primary cause of chassis backplane fault codes. Always verify your keying bands match pins 14-16 and 10-12 before seating the \u003cstrong\u003e1771-IAD\u003c\/strong\u003e into the \u003cstrong\u003e1771\u003c\/strong\u003e chassis. Furthermore, utilizing the \u003cstrong\u003e1771-WH\u003c\/strong\u003e wiring arm correctly saves hours of rewiring labor during emergency hardware swaps.\u003c\/p\u003e\n\n\u003ch3 style=\"font-weight: bold; margin-top: 20px; margin-bottom: 15px;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can the 1771-IAD module handle mixed AC and DC signals simultaneously across its 16 channels?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, the module accepts both 120VAC and 125VDC inputs, but system designers typically group similar voltage types per common terminal blocks to maintain electrical safety and signal clarity.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What should I check if a channel LED does not illuminate when a field switch closes?\u003c\/strong\u003e\u003cbr\u003e\nA: Global PLC Spare HUB field experts recommend checking the input voltage level to ensure it exceeds the 79V threshold and verifying that the field wiring arm is securely locked.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How does optoelectrical isolation protect the PLC control system?\u003c\/strong\u003e\u003cbr\u003e\nA: Optoelectrical isolation creates a barrier between field-side high voltage transients and processor-side logic circuits, preventing surge damage to your expensive \u003cstrong\u003ePLC-5\u003c\/strong\u003e hardware.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013911470262,"sku":"1771-IAD","price":142.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1771-IAD_f31a76ee-7acc-45d3-a2ad-e012aec0ebef.jpg?v=1789538106","url":"https:\/\/www.plcsparehub.com\/products\/1771-iad-ab-1771-series-120v-ac-dc-input-module","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}