{"product_id":"1762-iq8-rockwell-automation-micrologix-discrete-input-module","title":"1762-IQ8 Rockwell Automation MicroLogix Discrete Input Module","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1762-IQ8\u003c\/strong\u003e\u003c\/span\u003e is an 8-channel sink\/source DC digital input expansion module within the Allen-Bradley \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eMicroLogix Series\u003c\/strong\u003e\u003c\/span\u003e by Rockwell Automation. Designed for compact industrial control applications, this single-slot module expands the input capacity of host controllers via the integrated 1762 bus interface. Operating at a nominal 24VDC input voltage, it detects signal states from field devices such as limit switches, proximity sensors, and pushbuttons across a wide 10 to 30VDC operating envelope.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eTechnical \u0026amp; Electrical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eBrand \u0026amp; Manufacturer\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eAllen-Bradley \/ Rockwell Automation\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eModel \u0026amp; Catalog Number\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1762-IQ8\u003c\/strong\u003e\u003c\/span\u003e (\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eMicroLogix Series\u003c\/strong\u003e\u003c\/span\u003e)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eDiscrete DC Digital Input Module\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eInput Capacity\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e8 Channels (1 isolated group of 8 inputs)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eWiring Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eSinking and Sourcing field device configurations\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eNominal \u0026amp; Range Voltage\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e24VDC nominal; 10 to 30VDC at 30°C (10 to 26.4VDC at 55°C)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eON-State Current Demands\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e2.0 mA min at 10VDC; 8.0 mA nominal at 24VDC; 12.0 mA max at 30VDC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eOFF-State Current Threshold\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e1.5 mA maximum allowable leakage current\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eSignal Transition Delay\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e8 ms typical hardware signal delay (OFF-to-ON and ON-to-OFF)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eBackplane Power Consumption\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e50 mA at 5.1VDC (0.25 W); 0 mA at 24VDC; 3.7 W maximum heat dissipation\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eDielectric Isolation Rating\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e1200VAC for 1 sec or 1697VDC for 1 sec; 75VDC working voltage (IEC Class 2 reinforced)\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e\u003cstrong\u003eSystem Compatibility \u0026amp; Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eHost Controller Platforms\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eMicroLogix 1100, MicroLogix 1200, MicroLogix 1400, and MicroLogix 1500 controllers\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eMounting Configurations\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e35 mm DIN rail or direct panel wall mounting with 50.8 mm (2 in) clearance spacing\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eTerminal Protection\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eFinger-safe removable terminal block cover over bit addresses 0 to 7\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eStatus Diagnostics\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eSingle multi-state LED status indicator for module power and operational integrity\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eEnvironmental Classifications\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eOvervoltage Category II rating; clean, dry non-hazardous industrial environment\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e\u003cstrong\u003eTarget Applications \u0026amp; Hardware Diagnostics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1762-IQ8\u003c\/strong\u003e\u003c\/span\u003e module is widely deployed on small OEM machinery, automated packaging cells, indexing tables, and pump control panels. Automation technicians rely on the front-panel status LED for rapid visual verification during commissioning. If a field device fails to trigger an input bit, technicians measure the signal terminal against the common bus; a voltage above 10VDC with at least 2.0 mA drive current verifies that the field circuit properly satisfies the module's ON-state threshold.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eGlobal PLC Spare HUB's Insight\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIn compact control cabinets where thermal dissipation is critical, engineers often overlook input module heat loads. When expanding a MicroLogix 1400 rack with multiple \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1762-IQ8\u003c\/strong\u003e\u003c\/span\u003e units, maintaining the mandatory 50.8 mm (2-inch) surrounding air gap prevents heat buildup from the 3.7 W dissipation spec. Additionally, verifying whether field sensors are PNP (sourcing) or NPN (sinking) prior to landing wire on the shared common terminal avoids short-circuit trips during initial system power-up.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eModel Selection Comparison \u0026amp; Technical Recommendations\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eEvaluate hardware density options within the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eMicroLogix Series\u003c\/strong\u003e\u003c\/span\u003e expansion I\/O family:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard 8-Point Input Module:\u003c\/strong\u003e The \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1762-IQ8\u003c\/strong\u003e\u003c\/span\u003e offers an economical 8-channel footprint with a single common point for small-scale digital sensor integration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Density 16-Point Variant:\u003c\/strong\u003e For panels with higher input counts, selecting a 16-point input module doubles channel density per expansion slot, reducing total DIN rail footprint when backplane power budgets allow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eEngineering Selection Tip:\u003c\/strong\u003e Match your total expansion count to the host controller's expansion bus limit. MicroLogix 1100 controllers support up to 4 expansion modules, while MicroLogix 1200\/1400 models handle up to 7 modules. Calculate total 5.1VDC backplane current draw across all connected modules to ensure it remains under the host supply's maximum threshold.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eWarranty, Logistics \u0026amp; Product Quality\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition Guarantee:\u003c\/strong\u003e 100% Brand New and Original in Factory Sealed Packaging\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty Coverage:\u003c\/strong\u003e Backed by a full 12 Months factory warranty\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShipping Lead Time:\u003c\/strong\u003e Ships within 24 to 48 hours following order processing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExpress Couriers:\u003c\/strong\u003e Fast global delivery via FedEx, UPS, and DHL\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions (FAQ)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I configure the common terminal for sinking versus sourcing input wiring on this module?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eA: For sinking inputs (NPN sensors), connect the common terminal to DC+ (+24V). For sourcing inputs (PNP sensors), connect the common terminal to DC- (24V Common).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is the significance of the 8 ms hardware signal delay on input channels?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eA: The built-in 8 ms hardware filter buffers mechanical contact bounce from switches and relays, preventing false input triggers in PLC logic execution.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can high-speed encoder pulses be captured directly by channels on this expansion module?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eA: No, the 8 ms transition delay limits signal processing; high-speed pulse trains must connect directly to the host controller's embedded high-speed counter (HSC) inputs.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does the 1762-IQ8 module draw 24VDC operating power directly from the host controller backplane?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eA: The module draws 50 mA from the 5.1VDC backplane logic bus, while channel input loop power (10-30VDC) must be supplied by an external field power supply.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How can technicians field-test an individual input channel that appears inactive in software?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eA: Jumper 24VDC directly across the channel terminal and its assigned common. If the channel bit updates in the controller data table, inspect the field wiring or sensor output.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013911765174,"sku":"1762-IQ8","price":166.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1762-IQ8_7d82278e-0368-4b3c-84e4-a6d6b7eb09ff.jpg?v=1785314650","url":"https:\/\/www.plcsparehub.com\/products\/1762-iq8-rockwell-automation-micrologix-discrete-input-module","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}