{"product_id":"1756-ob16d-allen-bradley-digital-output-module-controllogix","title":"1756-OB16D Allen-Bradley Digital Output Module ControlLogix","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1756-OB16D\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1756-OB16D\u003c\/strong\u003e Digital Output Module, operates as a dedicated hardware component for 24 VDC sourcing field actuator drive and circuit fault diagnostics within ControlLogix rack architectures.\u003c\/p\u003e\n\u003ch3\u003eSystem Model Nomenclature \u0026amp; Circuit Topology\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1756\u003c\/strong\u003e: ControlLogix modular chassis mounting platform.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOB16\u003c\/strong\u003e: 16-channel 24 VDC electronical sourcing output circuitry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD\u003c\/strong\u003e: Integrated diagnostic capability providing per-channel load loss, short circuit monitoring, and field power loss reporting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOperational Parameters \u0026amp; Physical Limits\u003c\/h3\u003e\n\u003cfigure\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\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1756-OB16D\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\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.35 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e23.3 x 18.3 x 5.3 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePower Dissipation: 3.3 W at 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagnostic Outputs\u003c\/td\u003e\n\u003ctd\u003e16-point sourcing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC Source\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e19.2-30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Output Current Rating\u003c\/td\u003e\n\u003ctd\u003e2 A per point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5 VDC)\u003c\/td\u003e\n\u003ctd\u003e250 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (24 VDC)\u003c\/td\u003e\n\u003ctd\u003e140 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTariff Code\u003c\/td\u003e\n\u003ctd\u003e8537101190\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Location\u003c\/td\u003e\n\u003ctd\u003eXiamen, China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eNetwork Throughput \u0026amp; Backplane Bus Protocols\u003c\/h3\u003e\n\u003cp\u003eThe module coordinates real-time electronic switching while sustaining continuous backplane bus communication velocity across EtherNet\/IP deterministic networks. Diagnostic status bits stream directly to system memory without delaying controller firmware flash compatibility or local rack scan synchronization, supporting high I\/O density scaling across expanded industrial chassis nodes.\u003c\/p\u003e\n\u003ch3\u003eStandard Delivery Content\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Allen-Bradley 1756-OB16D Diagnostic Digital Output Module Assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Wiring \u0026amp; Chassis Mount Directives\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAlign the module rear circuit guides with the targeted slot on the ControlLogix chassis and slide inward until side latches click.\u003c\/li\u003e\n\u003cli\u003eConnect external 24 VDC system field power and output load wiring to the dedicated Removable Terminal Block (RTB).\u003c\/li\u003e\n\u003cli\u003eVerify solid metallic contact between the chassis enclosure frame and primary panel earth grounding bars.\u003c\/li\u003e\n\u003cli\u003eMaintain clear physical separation between 24 VDC field output wiring and high-voltage AC conductors inside wire ducts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWhat primary diagnostic functions are supported by the 1756-OB16D output hardware?\u003c\/p\u003e\n\u003cp\u003eThe module provides electronic short-circuit protection, open-load detection, and field supply voltage diagnostic monitoring per point.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat maximum continuous output current can a single channel drive?\u003c\/p\u003e\n\u003cp\u003eEach individual output channel is rated to drive a maximum field current load of 2 A at 24 VDC nominal supply.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow much current does the 1756-OB16D draw from the internal backplane rails?\u003c\/p\u003e\n\u003cp\u003eThe internal circuit draws 250 mA from the 5 VDC backplane rail and 140 mA from the 24 VDC backplane supply rail.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat operating voltage range is permitted for external field supply power?\u003c\/p\u003e\n\u003cp\u003eThe module channels operate within an external DC field supply voltage window of 19.2 to 30 VDC.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan this output module be swapped out while the rest of the chassis is powered?\u003c\/p\u003e\n\u003cp\u003eYes, the hardware supports Removal and Insertion Under Power (RIUP) without disrupting parallel chassis operations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat thermal power dissipation should be accounted for in cabinet heating calculations?\u003c\/p\u003e\n\u003cp\u003eThe module reaches a maximum thermal power dissipation of 3.3 W when operating fully loaded at 60 deg C ambient.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhich terminal blocks are compatible with field load connections on this card?\u003c\/p\u003e\n\u003cp\u003eField conductors connect via standard ControlLogix 20-pin or 36-pin RTB units, such as the 1756-TBNH or 1756-TBCH.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat action does an output channel take upon detecting an overcurrent condition?\u003c\/p\u003e\n\u003cp\u003eThe channel electronically trips to isolate the output, latches a fault status bit to the CPU, and lights a diagnostic LED.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066420711597,"sku":"1756-OB16D","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/allen-bradley_1756-ob16d.jpg?v=1787188140","url":"https:\/\/www.maxwellplc.com\/ga\/products\/1756-ob16d-allen-bradley-digital-output-module-controllogix","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}