{"product_id":"1771-il-allen-bradley-plc-5-series-analog-input-module","title":"1771-IL Allen-Bradley PLC-5 Series Analog Input Module","description":"\u003cp\u003eThe \u003cb\u003eAllen-Bradley 1771-IL\u003c\/b\u003e, also cataloged as the \u003cb\u003e1771IL\u003c\/b\u003e Analog Input Module, operates as a dedicated hardware component for isolated bipolar analog signal conversion within Allen-Bradley PLC-5 1771 I\/O chassis assemblies.\u003c\/p\u003e\n\u003ch3\u003eOrdering Reference \u0026amp; Model Architecture\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003e1771-IL\u003c\/b\u003e: High-resolution 8-point isolated analog input module processing voltage (-10 to 10 VDC) and current (-20 to 20 mA) field signals.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003e1771IL\u003c\/b\u003e: Equivalent catalog designation denoting the 8-channel isolated input board configured for 1771 I\/O slots.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications Summary\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1771-IL\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAllen-Bradley\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOrigin\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUSA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eWeight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.7 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eShipping Dimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24 x 14.7 x 3 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOperating Temp\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 60 deg C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePower Consumption\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e6.5 W\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInput Channels\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8 Points (Isolated)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eVoltage Range\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-10 to 10 VDC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCurrent Range\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-20 to 20 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eResolution\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e16-bit binary over full range\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBackplane Current\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.3 A at 5 VDC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInternal Scan Rate\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e50 ms for 8 channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eBackplane Integration \u0026amp; Deterministic Communication\u003c\/h3\u003e\n\u003cp\u003eThe unit executes analog-to-digital conversions across 8 isolated channels, sending 16-bit binary data values across the backplane bus communication velocity link. High-speed backplane throughput maintains deterministic execution across PLC-5 scanning loops. The internal circuit topology maintains firmware flash compatibility with host processors, supporting flexible I\/O density scaling without bus congestion.\u003c\/p\u003e\n\u003ch3\u003ePackage Inspection List\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e1 x 1771-IL Analog Input Module\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e1 x Field Wiring Arm Alignment Keying Plastic Clip\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical Installation Guidelines\u003c\/h3\u003e\n\u003ch4\u003eChassis Insertion Protocols\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eInsert plastic keying bands into the 1771 I\/O backplane edge connector matching the module slot configuration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAlign the circuit board edge with upper and lower card guides, sliding the module inward until the rear backplane connector locks into position.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWiring and Shielding Standards\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eTerminate all analog signal lines using shielded twisted-pair cables to restrict electromagnetic interference.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConnect cable shield drain wires to frame ground at a single ground point to eliminate differential loop currents.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRoute signal wiring through independent conduits kept separate from high-voltage AC distribution power cables.\u003c\/p\u003e\n\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 signal ranges does the 1771-IL support?\u003c\/p\u003e\n\u003cp\u003eThe module processes analog voltage inputs from -10 to 10 VDC and analog current inputs from -20 to 20 mA across its 8 channels.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the A\/D conversion resolution of the input channels?\u003c\/p\u003e\n\u003cp\u003eThe internal analog-to-digital converter delivers 16-bit binary resolution across the entire operating input signal range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow much current does the 1771-IL draw from the backplane?\u003c\/p\u003e\n\u003cp\u003eThe module draws a nominal current load of 1.3 A (up to 1.4 A maximum) at 5 VDC directly from the 1771 chassis backplane supply.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the internal update scan time for all 8 input channels?\u003c\/p\u003e\n\u003cp\u003eThe internal circuit architecture completes a full analog scan cycle across all 8 isolated channels in 50 ms.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan the module be inserted or removed while backplane power is active?\u003c\/p\u003e\n\u003cp\u003eNo. Backplane power must be fully isolated before module removal or insertion to prevent damage to backplane pin logic.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs channel-to-channel isolation provided on this module?\u003c\/p\u003e\n\u003cp\u003eYes. The 1771-IL features individual galvanically isolated input channels to prevent inter-channel signal ground interference.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat are the typical signal turn-off delay times for AC and DC inputs?\u003c\/p\u003e\n\u003cp\u003eThe module exhibits a typical AC signal turn-off delay of 24 (+\/- 10) ms and a typical DC signal turn-off delay of 20 (+\/- 9) ms.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat wire gauge range fits the field wiring arm terminals?\u003c\/p\u003e\n\u003cp\u003eThe corresponding field wiring arm accommodates solid or stranded copper wire sizes from 14 AWG to 22 AWG.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066443550893,"sku":"1771-IL","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/allen-bradley_1771-il.jpg?v=1786891340","url":"https:\/\/www.maxwellplc.com\/ga\/products\/1771-il-allen-bradley-plc-5-series-analog-input-module","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}