{"product_id":"allen-bradley-1771-ig-plc-5-series-digital-input-module","title":"Allen-Bradley 1771-IG PLC-5 Series Digital Input Module","description":"\u003cp\u003eConfigured for discrete status signal sensing in 1771 I\/O chassis assemblies, the \u003cstrong\u003eAllen-Bradley 1771-IG\u003c\/strong\u003e (\u003cstrong\u003e1771IG\u003c\/strong\u003e Digital Input Module) provides direct physical\/electrical execution.\u003c\/p\u003e\n\u003ch3\u003eCatalog Nomenclature \u0026amp; Hardware Variants\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1771-IG\u003c\/strong\u003e: Standard 16-point discrete TTL digital input card engineered for Allen-Bradley 1771 chassis racks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1771IG\u003c\/strong\u003e: Equivalent base assembly part number representing identical 16-point TTL digital input circuitry.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eElectrical \u0026amp; Physical Specifications\u003c\/h3\u003e\n\u003cfigure\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\u003e1771-IG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.4 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e2.8 x 15.3 x 26.0 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.5 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Points\u003c\/td\u003e\n\u003ctd\u003e16 Points (TTL Logic Level)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Category\u003c\/td\u003e\n\u003ctd\u003e5 VDC TTL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current Draw\u003c\/td\u003e\n\u003ctd\u003e0.3 A at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eChassis Slot Mountable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Network \u0026amp; Bus Integration\u003c\/h3\u003e\n\u003cp\u003eThe assembly processes field contact state changes and leverages backplane bus communication velocity routines to transmit digitized status bits across the backplane bus. High channel density enables optimized I\/O density scaling inside standard 1771 universal racks. The internal architecture maintains strict firmware flash compatibility with host PLC-5 controllers to prevent scan cycle delays or data buffer mismatches during execution.\u003c\/p\u003e\n\u003ch3\u003eStandard Package Items\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 1771-IG Digital Input Module Assembly\u003c\/li\u003e\n\u003cli\u003e1 x Field Wiring Arm Alignment Keying Clip\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical Installation \u0026amp; Wiring Guidelines\u003c\/h3\u003e\n\u003ch4\u003eChassis Insertion Steps\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSnap plastic keying bands into the chassis backplane edge connector at designated pin positions to enforce correct slot keying.\u003c\/li\u003e\n\u003cli\u003eAlign top and bottom circuit board guides with chassis slots and slide the assembly inward until the rear connector seats into the backplane.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWiring and Shielding Standards\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eRoute digital signal conductors using twisted-pair wiring to prevent electromagnetic cross-talk.\u003c\/li\u003e\n\u003cli\u003eTerminate signal drain wires to frame ground at a single panel connection point to avoid ground loops.\u003c\/li\u003e\n\u003cli\u003eMaintain a minimum separation of 30 cm between low-voltage TTL signal conduits and AC power cables.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Operational FAQs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWhat input voltage logic levels are supported by the 1771-IG?\u003c\/p\u003e\n\u003cp\u003eThe module is designed to interface with 5 VDC TTL logic-level discrete signal sources across its 16 points.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow much current does the 1771-IG draw from the chassis backplane?\u003c\/p\u003e\n\u003cp\u003eThe module logic circuits draw a nominal current load of 0.3 A at 5 VDC from the 1771 chassis backplane supply.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs hot-swapping permitted while the 1771 chassis is powered?\u003c\/p\u003e\n\u003cp\u003eNo. Disconnect backplane power before inserting or removing the card to prevent electrical damage to connector pins.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the total digital point density of this input module?\u003c\/p\u003e\n\u003cp\u003eThe 1771-IG module provides 16 discrete input channels for monitoring field device state conditions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat wire gauge size is compatible with the field wiring arm?\u003c\/p\u003e\n\u003cp\u003eThe field wiring terminal block accepts solid or stranded copper wire sizes ranging from 14 AWG to 22 AWG.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow does the module handle signal filtering for noise suppression?\u003c\/p\u003e\n\u003cp\u003eInternal RC filtering circuits condition input signals to prevent contact bounce transients from triggering false scans.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the module require an external DC power supply for field inputs?\u003c\/p\u003e\n\u003cp\u003eYes. Field inputs require a clean external 5 VDC supply reference matching TTL logic threshold requirements.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat operating temperature envelope applies to this module?\u003c\/p\u003e\n\u003cp\u003eThe card is specified for continuous operation in cabinet environments ranging from 0 to 60 deg C.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066443485357,"sku":"1771-IG","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/allen-bradley_1771-ig_1.jpg?v=1786891579","url":"https:\/\/www.maxwellplc.com\/ga\/products\/allen-bradley-1771-ig-plc-5-series-digital-input-module","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}