{"product_id":"allen-bradley-1794-ob16-flex-i-o-digital-output-module","title":"Allen-Bradley 1797-IE8 FLEX Ex Intrinsically Safe Analog Input Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1794-OB16\u003c\/strong\u003e is a high-density digital output module functioning within the \u003cstrong\u003eFLEX I\/O\u003c\/strong\u003e distributed architecture. This hardware component interfaces directly with standard terminal bases to supply twenty-four volt direct current (\u003cstrong\u003e24V DC\u003c\/strong\u003e) sourcing signals to various field actuators, indicators, and interposing relays. By converting electronic logic commands from a central processing unit into physical switching operations, the device enables modular extension of control topologies away from the main chassis over industrial networks such as \u003cstrong\u003eEtherNet\/IP\u003c\/strong\u003e, \u003cstrong\u003eControlNet\u003c\/strong\u003e, or \u003cstrong\u003eDeviceNet\u003c\/strong\u003e through the addition of an appropriate network adapter.\u003c\/p\u003e\n\u003cp\u003eThis module houses sixteen independent, non-isolated output channels configured in a sourcing topology, drawing operational current directly from an external power bus via the terminal base assembly. The \u003cstrong\u003e1794-OB16\u003c\/strong\u003e features internal diagnostic indicators that provide local troubleshooting data to electrical maintenance teams, streamlining verification during line installation and preventive upkeep within continuous process plants, material handling facilities, and automotive manufacturing lines.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSixteen discrete output points arranged in a compact sourcing arrangement.\u003c\/li\u003e\n\u003cli\u003eDirect insertion into compatible terminal base units for fast, toolless hot-swapping during active operations.\u003c\/li\u003e\n\u003cli\u003eIndividual light-emitting diode indicators mapping the status of each discrete channel for fast diagnostics.\u003c\/li\u003e\n\u003cli\u003eFlexible system engineering through native compatibility with diverse communication adapters.\u003c\/li\u003e\n\u003cli\u003eSolid-state switching mechanics eliminating physical contact wear for expanded life cycles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSolvent pump and pneumatic valve actuation systems.\u003c\/li\u003e\n\u003cli\u003eControl panel indication lights and stacked signaling towers.\u003c\/li\u003e\n\u003cli\u003eInterposing relay driver circuits inside power distribution boards.\u003c\/li\u003e\n\u003cli\u003ePackaging line sorting gate activation switches.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation \/ Allen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFLEX I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1794-OB16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eDigital Sourcing Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd\u003e16, Non-isolated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal On-State Voltage\u003c\/td\u003e\n\u003ctd\u003e24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e10V DC to 31.2V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOn-State Current Rating\u003c\/td\u003e\n\u003ctd\u003e0.5 A per channel maximum (8.0 A per module maximum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurge Current Limit\u003c\/td\u003e\n\u003ctd\u003e2 A for 50 ms, repeatable every 2 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e4.3 W maximum at 31.2V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexBus Current Draw\u003c\/td\u003e\n\u003ctd\u003e80 mA at 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-State Leakage Current\u003c\/td\u003e\n\u003ctd\u003e0.5 mA maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 55 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e5% to 95% non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApproximate Weight\u003c\/td\u003e\n\u003ctd\u003e0.08 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApproximate Dimensions\u003c\/td\u003e\n\u003ctd\u003e46 mm x 94 mm x 53 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eConnections\/Interfaces\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eTerminal Base Pin (Typical 1794-TB3)\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin 0 to Pin 15\u003c\/td\u003e\n\u003ctd\u003eOutput Channels 0 through 15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eV\u003c\/td\u003e\n\u003ctd\u003e24V DC Sourcing Power Supply Input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCOM\u003c\/td\u003e\n\u003ctd\u003eDC Common Return Path\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003ch3\u003eDIN Rail Installation\u003c\/h3\u003e\n\u003cp\u003eHook the top of the unit under the upper edge of the standard 35 mm DIN rail. Rotate the chassis downward until the integrated locking mechanism engages securely with the lower lip of the tracking rail.\u003c\/p\u003e\n\u003ch3\u003eTerminal Base Compatibility\u003c\/h3\u003e\n\u003cp\u003eAlign the module side grooves with the guide rails on the pre-installed terminal base unit, such as a 1794-TB2 or 1794-TB3. Push down firmly until the module is fully seated and the retention latch snaps into place.\u003c\/p\u003e\n\u003ch3\u003eCable Routing\u003c\/h3\u003e\n\u003cp\u003eKeep all discrete output wire channels physically separated from high-voltage AC lines and motor drive supply cords. Utilize bundled wiring trays to reduce cross-talk and ambient electromagnetic disturbance across the signal conductors.\u003c\/p\u003e\n\u003ch3\u003ePower Termination\u003c\/h3\u003e\n\u003cp\u003eVerify that external 24V DC power leads are securely screwed into the corresponding bus links on the terminal base block. Disconnect the primary line breakers before running terminal terminations to prevent unintended component short-circuiting.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the switching orientation of this specific module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module operates using a sourcing design, delivering 24V DC from the supply bus to the wired load device when an output point transitions to the active high state.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this device feature individual isolation barriers between channels?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, the sixteen points are non-isolated and utilize a shared internal power and common reference rail across the module circuit board.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan a damaged unit be swapped while the terminal base remains powered?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, the hardware structure allows for removal and replacement under power, but field-side actuator power should be isolated to prevent accidental equipment motion.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat terminal bases are recommended for installation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe unit fits onto standard modules including the 1794-TB2, 1794-TB3, 1794-TBN, and 1794-TB3S options depending on the required wiring termination layout.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat do the front panel yellow LED lights represent?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEach numbered indicator corresponds to an output point and illuminates when that channel receives a logical command to turn on.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs there built-in overcurrent or short-circuit protection for each channel?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module relies on external fusing or the electrical characteristics of the sourcing circuitry to prevent overload damage if an external short occurs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the current capacity per point if all channels are active?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEach channel can supply up to 0.5 A continuously, provided the total cumulative module current draw does not exceed the maximum aggregate limit of 8.0 A.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the module communicate back to a main ControlLogix controller?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt transfers data across the backplane to a network adapter module installed on the leftmost side of the local DIN rail cluster.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the minimum operating voltage required for stable output switching?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe reliable electrical operating window requires a minimum input potential of 10V DC to drive the internal solid-state output circuits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this purchase include the terminal block base unit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, this part number represents the electronic plug-in module only, requiring the terminal base to be sourced separately.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52695181885803,"sku":"1794-OB16","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/allen-bradley-1794-ob16-flex-i-o-digital-dc-output-modules-4u4e3ur2yr1_e1e675af-dd61-47fb-985f-c58f8aa70e7c.jpg?v=1766114320","url":"https:\/\/www.plcprotech.com\/bg\/products\/allen-bradley-1794-ob16-flex-i-o-digital-output-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}