{"product_id":"20-750-s-allen-bradley-powerflex-750-series-safe-torque-off-sto-option-module","title":"20-750-S | Allen-Bradley | PowerFlex 750-Series Safe Torque Off (STO) Option Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 20-750-S\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as a critical safety component within the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePowerFlex 750-Series\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(PowerFlex 753 and 755) drive architecture. This hardware-based\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSafe Torque Off (STO)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoption module provides a dedicated solution for removing rotational power from the motor without disconnecting the drive from the main power source. We supply this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoriginal factory stock, enabling engineers to meet stringent global safety certifications while maintaining high system availability and reducing mechanical wear on line contactors.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAllen-Bradley \/ Rockwell Automation\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProduct Line\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePowerFlex 750-Series Options\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e20-750-S\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSafety Function\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHardwired Safe Torque Off (STO)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSafety Ratings\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSIL3 (IEC 61508), PLe (ISO 13849-1), Cat 4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24V DC Safety Inputs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePowerFlex 753 and PowerFlex 755 (All Frames)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDedicated Internal Option Slot\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eResponse Time\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u0026lt; 12 ms (Typical)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.28 lbs (0.13 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCertified Functional Safety:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 20-750-S meets the highest safety integrity levels, including\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSIL3, PLe, and Category 4\u003c\/strong\u003e. This certification allows the module to serve as the primary safety interface in high-risk applications such as robotic cells, web handling, and heavy material transport.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eElimination of Line Contactors:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBy utilizing the STO function, the drive stays energized while the motor remains in a safe, torque-free state. This removes the need for expensive and bulky redundant line contactors, significantly reducing cabinet space and eliminating the arcing\/wear associated with cycling main power.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRapid Restart Capability:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSince the drive logic remains powered during an STO event, the system resumes operation immediately once the safety circuit clears. This minimizes downtime compared to traditional \"E-Stop\" methods that require a full drive reboot and communication handshake.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHardwired Reliability:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module features redundant 24V DC safety inputs. This dual-channel architecture ensures that a single component failure within the safety string will not result in a loss of the safety function, providing a fail-safe environment for plant personnel.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSimplified Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 20-750-S snaps directly into the drive’s internal option ports. Pluggable terminal blocks facilitate fast wiring and allow for quick module swaps during preventive maintenance cycles without disturbing the field cabling.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use the 20-750-S for a \"Safe Stop 1\" (SS1) function?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 20-750-S provides an immediate \"Safe Torque Off\" (Category 0 Stop). To achieve an SS1 (timed or monitored deceleration), you must combine this module with an external safety relay (like a Guardmaster Minotaur) to manage the deceleration ramp before triggering the STO.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this module support Safety over EtherNet\/IP?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The 20-750-S is a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehardwired\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esafety module. If your application requires networked safety (CIP Safety), you must utilize the 20-750-S3 (Integrated Safety) or 20-750-S4 (Integrated Safety Functions) modules.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 20-750-S compatible with both PowerFlex 753 and 755?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. It maintains full hardware compatibility across the entire PowerFlex 750-Series family, regardless of the frame size.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I confirm the safety integrity of a new unit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEvery\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e20-750-S we ship comes in original, factory-sealed anti-static packaging with a verifiable serial number and manufacturer's Certificate of Conformity to ensure it meets all stated safety ratings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52532254114101,"sku":"20-750-S","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/20-750-S.jpg?v=1775204630","url":"https:\/\/www.5gplc.com\/products\/20-750-s-allen-bradley-powerflex-750-series-safe-torque-off-sto-option-module","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}