{"product_id":"allen-bradley-1746-io12-slc-500-digital-i-o-combination-module","title":"Allen-Bradley 1746-IO12 SLC 500 Digital I\/O Combination Module","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eWhen control panels run out of space and every slot counts, the Allen-Bradley 1746-IO12 delivers a practical solution. This SLC 500 Digital I\/O Combination Module merges six 120V AC input channels with six relay output channels into a single chassis slot, cutting hardware costs and simplifying wiring. By combining input and output functions, the 1746-IO12 reduces the number of modules needed in an enclosure, freeing up space for other critical components.\u003c\/p\u003e\u003cp\u003eThe Allen-Bradley 1746-IO12 operates with an input voltage range of 85–132V AC, making it compatible with standard industrial power supplies. Its relay outputs handle both AC and DC loads, offering flexibility across diverse applications. This module is engineered for reliable performance in demanding environments, with CSA certification for Class 1, Division 2 hazardous locations.\u003c\/p\u003e\u003ch2\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSix 120V AC inputs\u003c\/strong\u003e – direct connection to sensors, switches, and pushbuttons.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSix Form A (Normally Open) relay outputs\u003c\/strong\u003e – suitable for controlling contactors, solenoids, and small motors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide output voltage range\u003c\/strong\u003e – 24–125V DC and 120–240V AC, accommodating mixed-load systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-slot design\u003c\/strong\u003e – maximizes chassis capacity in the SLC 500 platform.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast signal response\u003c\/strong\u003e – 35ms ON delay and 45ms OFF delay for efficient process control.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation\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\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1746-IO12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eSLC 500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eDigital I\/O Combination Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputs\u003c\/td\u003e\n\u003ctd\u003eSix (6) 120V AC inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs\u003c\/td\u003e\n\u003ctd\u003eSix (6) Form A Contacts (Normally Open)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Operating Voltage\u003c\/td\u003e\n\u003ctd\u003e120V AC (range 85–132V AC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Operating Voltage\u003c\/td\u003e\n\u003ctd\u003e24–125V DC; 120–240V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent per Output (24V DC)\u003c\/td\u003e\n\u003ctd\u003e1.2 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent per Output (120V AC)\u003c\/td\u003e\n\u003ctd\u003e1.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous Current per Module\u003c\/td\u003e\n\u003ctd\u003e8.0 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e70–90 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Delay\u003c\/td\u003e\n\u003ctd\u003e35–45 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlot Width\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eArea Classification\u003c\/td\u003e\n\u003ctd\u003eClass 1, Division 2 (CSA certified)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eThese specifications are directly sourced from the manufacturer’s data, ensuring accuracy for your system design. The 1746-IO12’s backplane current draw of 0.090A at 5V DC and 0.070A at 24V DC must be considered when calculating total power consumption in a chassis.\u003c\/p\u003e\u003ch2\u003eIndustry Applications\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1746-IO12 excels in applications that require both discrete sensing and load switching in one compact unit. Common use cases include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging machinery\u003c\/strong\u003e – monitor limit switches and activate actuators.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial handling systems\u003c\/strong\u003e – interface with photoelectric sensors and drive conveyor motor contactors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHVAC control panels\u003c\/strong\u003e – manage fan and damper actuators while reading status inputs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eBecause the 1746-IO12 combines I\/O functions, it is especially valuable in retrofits where panel space is limited. Replacing separate input and output modules with this combination unit can reduce installation time and spare parts inventory.\u003c\/p\u003e\u003ch2\u003eInstallation \u0026amp; Setup Guidance\u003c\/h2\u003e\u003cp\u003eInstalling the Allen-Bradley 1746-IO12 is straightforward. The module occupies one slot in an SLC 500 local or expansion chassis. Follow these steps for a reliable setup:\u003c\/p\u003e\u003col\u003e\n\u003cli\u003ePower down the chassis and remove the front cover of the chosen slot.\u003c\/li\u003e\n\u003cli\u003eSlide the 1746-IO12 into the slot until it seats firmly against the backplane connector.\u003c\/li\u003e\n\u003cli\u003eSecure the module in place using the locking screws at the top and bottom.\u003c\/li\u003e\n\u003cli\u003eWire the input terminals to 120V AC sources and the output terminals to the controlled loads, respecting polarity for DC outputs.\u003c\/li\u003e\n\u003cli\u003eApply power and verify the module’s status LEDs indicate normal operation.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003eAlways observe local electrical codes and ensure the module’s power ratings match your load requirements. The 1746-IO12 is designed for Class 1, Division 2 hazardous locations, but proper wiring methods must be followed to maintain that rating.\u003c\/p\u003e\u003ch2\u003eMaintenance \u0026amp; Reliability\u003c\/h2\u003e\u003cp\u003eTo maximize the lifespan of the Allen-Bradley 1746-IO12, incorporate routine checks into your maintenance schedule. Inspect the module quarterly for signs of overheating, loose wiring, or corrosion. The relay outputs have a finite mechanical life; if a channel fails to switch, replace the module with the same part number—no reconfiguration is needed, but always disconnect power before servicing.\u003c\/p\u003e\u003cp\u003eEnvironmental factors can affect performance. The 1746-IO12 operates reliably in temperatures from 0–60°C and humidity from 5–95% (non-condensing). Avoid exposing the module to chemicals that could degrade its components. Periodic loop validation ensures the I\/O points still meet process requirements.\u003c\/p\u003e\u003ch2\u003eCompatibility \u0026amp; Integration\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1746-IO12 is part of the SLC 500 family, so it integrates seamlessly with SLC 500 processors and other 1746-series modules. You can mix this combination module with discrete, analog, and communication modules in the same chassis, provided you reserve the dedicated processor slot. The module communicates over the backplane, requiring no additional cabling.\u003c\/p\u003e\u003cp\u003eFor system expansions, place the 1746-IO12 in a local or expansion chassis as needed. Its single-slot footprint leaves ample room for future I\/O additions. The module’s relay outputs can drive a wide range of loads, making it a versatile building block for control panels.\u003c\/p\u003e\u003ch2\u003eSelection Guide \u0026amp; Purchasing Advice\u003c\/h2\u003e\u003cp\u003eBefore purchasing the Allen-Bradley 1746-IO12, verify your system’s voltage requirements and load currents. Confirm that the 120V AC input range and relay output ratings match your application. Also, check your chassis’s backplane current capacity to ensure the total draw of all modules stays within limits.\u003c\/p\u003e\u003cp\u003eWhen you need genuine Allen-Bradley parts, PLC Source PRO offers the 1746-IO12 with fast shipping and professional support. We understand that downtime costs money, so we stock a wide range of SLC 500 modules to keep your operations running.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default","offer_id":44434687721571,"sku":"1746-IO12","price":237.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/1746-A13_3__E5_89_AF_E6_9C_AC_fe2d3fcf-1853-484b-8fb2-2686db6fe692.jpg?v=1785767759","url":"https:\/\/www.plcsourcepro.com\/ar\/products\/allen-bradley-1746-io12-slc-500-digital-i-o-combination-module","provider":"PLC Source PRO","version":"1.0","type":"link"}