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The Allen‑Bradley 20-750-S is a PowerFlex 750 series Safe Torque Off (STO) safety option module, installed inside PowerFlex 753 / 755 AC drives to provide safe torque-off safety function. It disables drive IGBT power output safely to prevent motor restart, achieving SIL CL3, PL e, Category 3 safety rating. 24V DC safety supply with dual safety enable inputs and diagnostic LED indicators. Technical data sourced from Rockwell Automation official datasheet. Supplied by SHLY-PLC, an independent industrial automation distributor; each unit undergoes visual inspection and functional testing before shipment for machine safety upgrade, retrofit and spare replacement projects. Contact our team for compatibility verification.
Technical parameters compiled from Rockwell Automation official datasheet.
| Technical Specifications | |
| Product type | Safe Torque Off Safety Option Card for PowerFlex750 |
| Order Code | 20-750-S |
| Safety Function | Safe Torque Off (STO) |
| Safety Performance | SIL CL3, PL e, Category 3 |
| Safety Power Supply | 24V DC ±10% |
| Safety Inputs | Dual redundant safety enable inputs |
| Configuration Tools | Connected Components Workbench, DriveExplorer |
| Environmental & Physical | |
| Operating Temperature | -20 °C to +60 °C |
| Storage Temperature | -40 °C ~ +85 °C |
| Relative Humidity | 5% ~ 95% RH, non-condensing |
| Certifications | UL, CE, UKCA, RCM, RoHS |
The 20-750-S STO safety option card for Allen‑Bradley PowerFlex 750 series drives, fits PowerFlex753 and PowerFlex755. Extended corrosion resistant variant: 20-750-S-XT. Other safety options in this family: 20-750-S1, 20-750-S3. It works alongside communication cards like 20-750-DNET, 20-750-ENETR. This listing is provided by an independent industrial-automation distributor; brand names and part numbers are used for product identification only.
Warranty: 12-month seller warranty provided by SHLY-PLC. See our Return Policy for coverage and claims.
A: 20-750-S is the Safe Torque Off STO safety option module for PowerFlex750 AC drives. It provides safe disable of drive power stage to prevent unexpected motor startup for machine safety compliance.
A: SIL CL3, PL e, Category 3, compliant with international machinery safety standards.
A: Same safety function and rating. 20-750-S-XT features extra coating for corrosive gas environment; 20-750-S is standard version.
20-750-S · Technical reference data · Independently supplied by SHLY-PLC
Standard International (tracked courier): delivered in 5–8 business days. In-stock items are processed within 2–4 business days. USD 25 flat rate on orders of $500 or less; free on orders over $500.
Express (DHL Express / FedEx International): upgraded expedited delivery in 2–4 business days. The Express surcharge is calculated at checkout based on destination and order weight.
Non-Stock / On-Order items ship on request: dispatch time is confirmed before your order — see our Shipping Policy. Remote-area and overweight surcharges, where applicable, are shown before checkout.
Every product is covered by a 12-month seller warranty provided by SHLY-PLC, effective from the date of delivery, against defects in materials and workmanship under normal use. Manufacturer or factory warranty service is not applicable, and extended warranty packages are not provided.
This warranty does not cover damage from misuse, improper installation, power surges, neglect, unauthorized repair, or normal wear and tear. See our Return Policy for warranty-claim instructions.
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