{"product_id":"allen-bradley-1771-ind-16-point-digital-ac-dc-input-module","title":"Allen-Bradley 1771-IND 16-point Digital Ac\/Dc Input Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1771-IND\u003c\/strong\u003e is a \u003cstrong\u003e16-point digital AC\/DC input module\u003c\/strong\u003e for PLC-5 1771 I\/O systems. It accepts both \u003cstrong\u003e16–30V AC\u003c\/strong\u003e and \u003cstrong\u003e9–30V DC\u003c\/strong\u003e signals, providing flexible dual-mode operation for interfacing a wide range of industrial switching devices with PLC-5 controllers.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Inputs:\u003c\/strong\u003e 16 channels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Category:\u003c\/strong\u003e 24V AC\/DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAC Operating Range:\u003c\/strong\u003e 16–30V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC Operating Range:\u003c\/strong\u003e 9–30V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Current:\u003c\/strong\u003e 250 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax AC Off-State Current:\u003c\/strong\u003e 1.5 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax DC Off-State Current:\u003c\/strong\u003e 0.6 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical AC Signal Delay (On):\u003c\/strong\u003e 35 ± 10 ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical DC Signal Delay (On):\u003c\/strong\u003e 10 ms (Series B: 5 ms)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical AC Signal Delay (Off):\u003c\/strong\u003e 45 ± 15 ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical DC Signal Delay (Off):\u003c\/strong\u003e 50 ms (Series B: 10 ms)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolation:\u003c\/strong\u003e 1500V AC tested (Series B)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Arm:\u003c\/strong\u003e 1771-WH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Rack mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e 0–60 °C (32–140 °F)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.05 lbs (930 g)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFeatures \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual AC\/DC Operation:\u003c\/strong\u003e Single module handles both AC and DC input signals, reducing inventory and simplifying design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed DC Response:\u003c\/strong\u003e Series B offers 5 ms ON delay for fast DC signal detection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrong Electrical Isolation:\u003c\/strong\u003e 1500V AC isolation (Series B) protects controller from field-side transients\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Power Consumption:\u003c\/strong\u003e 3.8 mA per input (DC) minimizes power supply loading\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Voltage Tolerance:\u003c\/strong\u003e 9–30V DC and 16–30V AC ranges accommodate typical industrial control voltages\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 1771 Form Factor:\u003c\/strong\u003e Compatible with all 1771-series I\/O chassis and wiring arms\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e24V DC sensor and switch interfacing\u003c\/li\u003e\n\u003cli\u003e24V AC pilot device monitoring\u003c\/li\u003e\n\u003cli\u003eMachine control and safety circuit input\u003c\/li\u003e\n\u003cli\u003ePushbutton and selector switch detection\u003c\/li\u003e\n\u003cli\u003eLimit switch and proximity sensor integration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Configuration:\u003c\/strong\u003e The entire module must be configured for either AC or DC operation—\u003cstrong\u003edo not mix AC and DC inputs on the same module\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Installation:\u003c\/strong\u003e Insert the 1771-IND into a compatible 1771 I\/O chassis slot. Verify backplane current capacity (250 mA).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Arm Connection:\u003c\/strong\u003e Attach the \u003cstrong\u003e1771-WH wiring arm\u003c\/strong\u003e for screw-terminal field connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField Wiring:\u003c\/strong\u003e Connect all 16 inputs to either AC (16–30V) or DC (9–30V) field devices. Maintain consistent voltage type across all channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWire Separation:\u003c\/strong\u003e Route AC\/DC input conductors separately from communication and low-level signal wiring to reduce electrical interference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTorque Specification:\u003c\/strong\u003e Use a torque screwdriver set to \u003cstrong\u003e7–9 lb-in\u003c\/strong\u003e for secure, vibration-resistant terminal connections.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I mix AC and DC inputs on the 1771-IND?\u003c\/strong\u003e\u003cbr\u003e\nA: No. The entire module must be configured for either AC or DC operation. All 16 inputs must use the same voltage type.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is the minimum activation voltage?\u003c\/strong\u003e\u003cbr\u003e\nA: 16V AC or 9V DC is required to guarantee ON-state detection.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is the maximum wire length?\u003c\/strong\u003e\u003cbr\u003e\nA: Up to 1000 feet (305 meters) with proper shielding and wire gauge. Verify voltage drop calculations for long runs.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is the 1771-IND suitable for outdoor use?\u003c\/strong\u003e\u003cbr\u003e\nA: No. The module is rated for indoor\/dry locations only. Install in NEMA-rated enclosures for environmental protection.\u003c\/p\u003e\n\n\u003ch3\u003eSelection Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVerify all field devices use the same voltage type (AC or DC) before selecting this module\u003c\/li\u003e\n\u003cli\u003eSeries B offers faster DC response (5 ms) and higher isolation (1500V) than earlier series\u003c\/li\u003e\n\u003cli\u003eCalculate total wire run length and verify signal integrity at the module terminals\u003c\/li\u003e\n\u003cli\u003eUse shielded cables for installations exceeding 100 feet to prevent noise pickup\u003c\/li\u003e\n\u003cli\u003eFor new designs, consider CompactLogix 1769-IQ16 or ControlLogix 1756-IB16D modules\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53803391451320,"sku":"1771-IND","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1771-IND_2.png?v=1784796204","url":"https:\/\/www.globalpetroparts.com\/products\/allen-bradley-1771-ind-16-point-digital-ac-dc-input-module","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}