{"product_id":"allen-bradley-1746-ob16-digital-dc-output-module-slc500-series","title":"Allen-Bradley 1746-OB16 Digital DC Output Module – SLC500 Series","description":"\u003ch2\u003eProduct Introduction\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1746-OB16 is a Digital DC Output Module from the SLC500 series, designed to drive high-current DC loads in industrial control systems. With sixteen (16) outputs in a single group, this module delivers a 24VDC output signal with an operating voltage range of 10–30VDC. Built by Rockwell Automation, the 1746-OB16 ensures robust switching performance, making it a cost-effective choice for applications requiring reliable on\/off control of solenoids, relays, and indicator lights. Its compact design minimizes panel space while maximizing output density, contributing to lower total cost of ownership over the module's service life.\u003c\/p\u003e\u003cp\u003eWhen system downtime or component failure threatens production, the 1746-OB16 offers a proven solution. Its solid-state design reduces wear compared to electromechanical relays, and the low heat dissipation (7.6 Watts) simplifies thermal management in crowded enclosures. By selecting the Allen-Bradley 1746-OB16, you invest in a module that balances performance with longevity, reducing maintenance intervals and spare parts inventory.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eBelow are the key parameters for the Allen-Bradley 1746-OB16. All values are sourced directly from the product datasheet and are guaranteed by Rockwell Automation.\u003c\/p\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\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd\u003e16 (sixteen)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e10–30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Delay OFF→ON\u003c\/td\u003e\n\u003ctd\u003e1.0 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Delay ON→OFF\u003c\/td\u003e\n\u003ctd\u003e0.1 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOFF‑State Leakage Current\u003c\/td\u003e\n\u003ctd\u003e1 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current at 5.1 V\u003c\/td\u003e\n\u003ctd\u003e0.135 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous Current per Point\u003c\/td\u003e\n\u003ctd\u003e1.5 A @ 30°C \/ 1.0 A @ 55°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous Current per Module (max)\u003c\/td\u003e\n\u003ctd\u003e6.4 A @ 0…60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Range (Source)\u003c\/td\u003e\n\u003ctd\u003e10–50 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent per Output\u003c\/td\u003e\n\u003ctd\u003e0.5 A or 0.25 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent per Module\u003c\/td\u003e\n\u003ctd\u003e8 A or 4 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5 V)\u003c\/td\u003e\n\u003ctd\u003e280 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent\/Module @30°C\u003c\/td\u003e\n\u003ctd\u003e9 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Dissipation\u003c\/td\u003e\n\u003ctd\u003e7.6 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStep Response (In\/Out)\u003c\/td\u003e\n\u003ctd\u003e60 ms in \/ 2.5 ms out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003eHigh Current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eThe high continuous current per point (1.5 A at 30°C) and low heat dissipation make the 1746-OB16 ideal for densely packed cabinets. The fast ON→OFF delay (0.1 ms) ensures precise timing in sequenced operations, reducing wear on downstream actuators.\u003c\/p\u003e\u003ch2\u003eIndustry Applications\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1746-OB16 excels in high‑current discrete control tasks. Common applications include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging machinery\u003c\/strong\u003e – driving solenoids and actuators that handle high inrush currents. The module's ability to deliver 1.5 A per point reduces the need for external interposing relays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial handling systems\u003c\/strong\u003e – controlling motor starters and conveyor diverters. The rugged output stage withstands frequent on\/off cycles without degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomotive assembly lines\u003c\/strong\u003e – switching weld guns and pneumatic valves. The 24VDC output matches standard industrial supply voltages, simplifying integration.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eBy choosing the 1746-OB16, manufacturers benefit from reduced downtime and lower spare parts cost compared to relay‑based solutions. The solid‑state outputs have a longer electrical life, directly improving ROI.\u003c\/p\u003e\u003ch2\u003eMaintenance \u0026amp; Reliability\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1746-OB16 requires minimal routine maintenance. Because it uses transistor outputs rather than mechanical contacts, there are no moving parts to wear out. However, periodic inspections should include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eChecking the backplane current draw (0.135 A at 5.1 V) to ensure the power supply is not overloaded.\u003c\/li\u003e\n\u003cli\u003eVerifying that ambient temperature remains within 0…60°C to avoid derating the continuous current per point.\u003c\/li\u003e\n\u003cli\u003eInspecting connector pins for oxidation or looseness, especially in high‑vibration environments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWith proper care, the 1746-OB16 delivers reliable service for years. Its low heat dissipation (7.6 W) reduces thermal stress on adjacent modules, further extending overall system life.\u003c\/p\u003e\u003ch2\u003eTroubleshooting \u0026amp; Common Issues\u003c\/h2\u003e\u003cp\u003eWhen diagnosing problems with the 1746-OB16, consider these typical scenarios:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput fails to turn on\u003c\/strong\u003e – Verify that the backplane power is present and the module is properly seated. Check the load voltage – it must be within 10–50 VDC source for correct operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcessive leakage current\u003c\/strong\u003e – The leakage current is specified at 1 mA max. If a connected device (e.g., a small relay) does not release, add a bleed resistor across the load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverheating\u003c\/strong\u003e – If the module exceeds 60°C, reduce the continuous load per point or improve cabinet ventilation. The module's current rating is temperature‑dependent.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAlways reference the SLC500 installation manual for detailed troubleshooting steps. The 1746-OB16’s internal diagnostics help identify open‑circuit or short‑circuit conditions quickly.\u003c\/p\u003e\u003ch2\u003eSelection Guide \u0026amp; Purchasing Advice\u003c\/h2\u003e\u003cp\u003eBefore purchasing the Allen-Bradley 1746-OB16, confirm that your system supports SLC500 series I\/O modules. Check the backplane power budget – the module draws 280 mA at 5 V, which must be within your chassis capacity. Also verify the output wiring: the module provides sourcing DC outputs, so your loads must be connected between the output and common (DC‑).\u003c\/p\u003e\u003cp\u003eUBEST Automation offers the 1746-OB16 as a genuine Rockwell Automation product, backed by our quality assurance. Visit ubest101.myshopify.com to check current inventory and pricing. For bulk orders or expedited shipping, contact our sales team directly.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default","offer_id":44403737919587,"sku":"1746-OB16","price":237.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/1746-OB16_3.jpg?v=1785006597","url":"https:\/\/www.plcsourcepro.com\/products\/allen-bradley-1746-ob16-digital-dc-output-module-slc500-series","provider":"PLC Source PRO","version":"1.0","type":"link"}