{"product_id":"allen-bradley-1756-ob32-digital-dc-output-module","title":"Allen-Bradley 1756-OB32 ControlLogix 32-Point 12\/24V DC Digital Output Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Allen-Bradley 1756-OB32 is a high-density ControlLogix digital output module designed for industrial automation environments. It provides 32 sourcing DC outputs, organized into two groups of 16 points each. This module is engineered for reliable operation within a voltage range of 10 to 31.2V DC, making it suitable for 12V or 24V DC control applications. It occupies a single slot in a standard ControlLogix chassis and integrates seamlessly with the backplane for high-speed data exchange and status reporting.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e32-point sourcing DC digital outputs\u003c\/li\u003e\n\u003cli\u003eTwo isolated groups of 16 points\u003c\/li\u003e\n\u003cli\u003eFast switching response times (1 ms max turn-on, 2 ms max turn-off)\u003c\/li\u003e\n\u003cli\u003eElectronic current limiting and short-circuit protection per channel\u003c\/li\u003e\n\u003cli\u003eReverse polarity and thermal protection\u003c\/li\u003e\n\u003cli\u003eConfigurable fault and program states via software\u003c\/li\u003e\n\u003cli\u003eCompatible with 1756-TBCH, 1756-TBS6H, and 1756-TBNH removable terminal blocks (RTB)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eWater\/Wastewater: Control of chemical dosing pumps and effluent valve positioning.\u003c\/li\u003e\n\u003cli\u003eOil, Gas, and Petrochemical: Management of pressure loops and precision burner gas-feed systems.\u003c\/li\u003e\n\u003cli\u003eFood and Beverage: Temperature regulation for mixing and cooking processes via PID logic.\u003c\/li\u003e\n\u003cli\u003ePower Generation: Integration of cooling tower fan systems and steam governor actuators.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1756-OB32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs\u003c\/td\u003e\n\u003ctd\u003e32-Point (Sourcing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e10-31.2V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent per Point\u003c\/td\u003e\n\u003ctd\u003e0.5A at 50 degC (derated to 0.35A at 60 degC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent per Module\u003c\/td\u003e\n\u003ctd\u003e16A at 50 degC (derated to 10A at 60 degC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Power\u003c\/td\u003e\n\u003ctd\u003e300mA at 5.1V DC; 2mA at 24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e4.8W max at 60 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e250V (continuous), reinforced insulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Delay (OFF to ON)\u003c\/td\u003e\n\u003ctd\u003e60 us nom \/ 1 ms max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Delay (ON to OFF)\u003c\/td\u003e\n\u003ctd\u003e200 us nom \/ 1 ms max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Down:\u003c\/strong\u003e Always disconnect all chassis and field-side power before inserting or removing the module to prevent electrical arcing or damage to the backplane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Align the module horizontally with the top and bottom card guides of the intended ControlLogix chassis slot. Push firmly until the chassis latches click to ensure a secure connection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeying:\u003c\/strong\u003e Utilize the mechanical keying system on the Removable Terminal Block (RTB) to prevent the insertion of an incorrectly configured RTB into this slot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring:\u003c\/strong\u003e Ensure proper grounding and use shielded cabling where required to minimize EMI. Verify that external field power is correctly fused according to load requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQs\u003c\/h3\u003e\u003ch3\u003eWhat is the operating voltage?\u003c\/h3\u003e\u003cp\u003eThe module operates within a range of 10 to 31.2V DC, with nominal operation at 12V or 24V DC.\u003c\/p\u003e\u003ch3\u003eWhich terminal blocks are compatible?\u003c\/h3\u003e\u003cp\u003eThe module requires a 36-pin removable terminal block (RTB), such as the 1756-TBCH (cage clamp) or 1756-TBS6H (spring clamp). These are sold separately.\u003c\/p\u003e\u003ch3\u003eWhy are half of my outputs not working?\u003c\/h3\u003e\u003cp\u003eThis is often caused by a blown internal 10A fuse. Each 16-point group is protected by an internal fuse; a short circuit in the field wiring will cause this fuse to open.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":50753917616380,"sku":"1756-OB32","price":63.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_28fc6cfb-92e5-4a54-af94-9f02a6142b2b.jpg?v=1785479781","url":"https:\/\/www.electronicplc.com\/ar\/products\/allen-bradley-1756-ob32-digital-dc-output-module","provider":"Electronic PLC","version":"1.0","type":"link"}