{"product_id":"1746-io12dc-allen-bradley-slc-500-24vdc-input-relay-output-module","title":"1746-IO12DC Allen-Bradley SLC 500 24VDC Input\/Relay Output Module","description":"\u003ch3\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eAllen-Bradley 1746-IO12DC SLC 500 Digital I\/O Combination Module Overview\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e1746-IO12DC\u003c\/span\u003e\u003c\/strong\u003e is a versatile digital I\/O combination module engineered for the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eSLC 500\u003c\/span\u003e\u003c\/strong\u003e platform. This module integrates \u003cstrong\u003e6 DC inputs\u003c\/strong\u003e and \u003cstrong\u003e6 relay contact outputs\u003c\/strong\u003e into a single-slot form factor, providing a cost-effective solution for small-scale automation or distributed I\/O requirements. The \u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e1746-IO12DC\u003c\/span\u003e\u003c\/strong\u003e operates with an input voltage range of 10-30V DC and features rugged relay outputs capable of switching both AC and DC loads. Its robust design ensures reliable performance across any available slot in an \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eSLC 500\u003c\/span\u003e\u003c\/strong\u003e chassis (excluding slot 0). We recommend engineers download the \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1746-IO12DC.pdf?v=1774939478\"\u003e1746 series installation guide\u003c\/a\u003e for proper terminal alignment.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eTechnical Specifications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e \u003cstrong\u003eRockwell Automation \/ Allen-Bradley\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e1746-IO12DC\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eSLC 500\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Type:\u003c\/strong\u003e \u003cstrong\u003eDigital I\/O Combination Module\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Count:\u003c\/strong\u003e \u003cstrong\u003e6 Points\u003c\/strong\u003e (24V DC Sinking\/Sourcing)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Count:\u003c\/strong\u003e \u003cstrong\u003e6 Points\u003c\/strong\u003e (Relay Contact - Normally Open)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Voltage Range:\u003c\/strong\u003e \u003cstrong\u003e10–30V DC\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Voltage Range:\u003c\/strong\u003e 5–265V AC \/ 5–125V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Output Current:\u003c\/strong\u003e 1.5A @ 120V AC \/ 1.2A @ 24V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Current:\u003c\/strong\u003e 80mA @ 5V DC \/ 60mA @ 24V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat Dissipation:\u003c\/strong\u003e 3.9 Watts (Total Module)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Delay:\u003c\/strong\u003e 35ms (ON) \/ 45ms (OFF)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e C-UL and CSA Certified; NEMA ICS 2-230 Noise Immunity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eGlobal PLC Spare HUB's Insight\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e1746-IO12DC\u003c\/span\u003e\u003c\/strong\u003e is a \"Swiss Army Knife\" for legacy system maintenance. In our engineering review, the primary value lies in its hybrid nature; it allows you to read 24V sensors while simultaneously driving high-voltage solenoids or motor starters through its isolated relay contacts. This eliminates the need for separate input and output modules in tight chassis configurations. Unlike solid-state modules, the mechanical relays in the \u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e1746-IO12DC\u003c\/span\u003e\u003c\/strong\u003e provide physical air-gap isolation, which is critical for safety-interlock monitoring and mixed-voltage control circuits.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eApplication \u0026amp; Diagnostic Capabilities\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiagnostic Indicators:\u003c\/strong\u003e Front-panel LEDs provide immediate visual confirmation of individual I\/O point status and module health.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDevice Compatibility:\u003c\/strong\u003e Interfaces perfectly with 24V DC proximity switches and limit switches, while driving AC contactors or DC indicators.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTarget Scenarios:\u003c\/strong\u003e Small pump stations, localized conveyor control, and retrofitting older machine tools where space is limited.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental Tolerance:\u003c\/strong\u003e Rated for 30G operational shock and 2.5G vibration, ensuring stability in high-impact industrial zones.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eShipping \u0026amp; Warranty\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Dispatch:\u003c\/strong\u003e We ship all \u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e1746-IO12DC\u003c\/span\u003e\u003c\/strong\u003e orders within \u003cstrong\u003e24-48 hours\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal Express:\u003c\/strong\u003e Worldwide delivery available via \u003cstrong\u003eFedEx\u003c\/strong\u003e, \u003cstrong\u003eUPS\u003c\/strong\u003e, and \u003cstrong\u003eDHL\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTechnical Warranty:\u003c\/strong\u003e Includes a full \u003cstrong\u003e12-month warranty\u003c\/strong\u003e against hardware failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage List:\u003c\/strong\u003e One \u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e1746-IO12DC\u003c\/span\u003e\u003c\/strong\u003e Combination Module in secure industrial packaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eFrequently Asked Questions (FAQ)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eCan I use the 1746-IO12DC to switch both AC and DC voltages on the same module?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYes. Since the outputs are relay contacts, you can wire different voltages to different points, provided you observe proper isolation and safety standards within the wiring duct.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhat happens if I exceed the 1.5A current rating on an output point?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eExceeding the current rating will lead to premature contact welding or carbon buildup. Always use an external interposing relay for high-current inductive loads.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eIs there a specific requirement for the input wiring polarity?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e1746-IO12DC\u003c\/span\u003e\u003c\/strong\u003e inputs are typically 24V DC. Ensure your common (COM) terminal matches your sensor type (PNP vs NPN) for correct sinking\/sourcing logic.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eDoes this module occupy the CPU slot in the SLC 500 chassis?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNo. The \u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e1746-IO12DC\u003c\/span\u003e\u003c\/strong\u003e can be placed in any slot except Slot 0, which is reserved exclusively for the SLC 500 processor.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHow do I troubleshoot a point that is \"On\" in software but the field device isn't moving?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCheck the module's LED. If the LED is on but the device is off, check for a blown fuse in your field wiring or a mechanical failure of the internal relay contact.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003ePurchasing \u0026amp; Maintenance Guide\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVerify your total backplane power budget; this module draws significant current from both the 5V and 24V rails.\u003c\/li\u003e\n\u003cli\u003eFor applications with high-frequency switching, consider solid-state modules instead, as mechanical relays have a finite lifespan.\u003c\/li\u003e\n\u003cli\u003eEnsure the terminal block is securely fastened to prevent intermittent I\/O signals caused by cabinet vibration.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013896593590,"sku":"1746-IO12DC","price":155.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1746-IO12DC_d82a829f-8f50-44e6-87c7-10d7b4d34ac0.jpg?v=1774946131","url":"https:\/\/www.plcsparehub.com\/products\/1746-io12dc-allen-bradley-slc-500-24vdc-input-relay-output-module","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}