OVERVIEW

Official designation: Allen-Bradley 20-750-S3 (PowerFlex 755, Safety Module)

Role/Application: Option module providing certified Safe Torque Off (STO) functionality via both hardwired inputs and network control over EtherNet/IP, ensuring compliance with global machine safety standards for PowerFlex 755/755T drives.

KEY SPECS SUMMARY

Power: Power supplied by drive

Interfaces / Ports: Dual safety channels, EtherNet/IP

Indicators: Refer to the latest manufacturer manual.

Operating Temp: 0 to 40 degrees C

Platform / Compatibility: PowerFlex 755/755T drives

Limit: Safety integrity level SIL 3 / PLe

Lifecycle: Active

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the safety performance levels this option module is certified to meet?

A: The module is certified to meet Safety Integrity Level SIL 3 and Performance Level PL e.

Wiring & Installation:

Q: What is the recommended torque for securing the retaining screws during module installation?

A: The recommended torque for the retaining screws is 0.45 newton meters (4.0 pound inches).

Troubleshooting & Compatibility:

Q: Can the Safe Torque Off function be activated via an EtherNet/IP network connection?

A: Yes, the module supports both hardwired and network-based STO over EtherNet/IP communication.

Replacement & Upgrades:

Q: Is a direct replacement module available, or is the 20-750-S3 currently an active product?

A: The 20-750-S3 module currently maintains an active lifecycle status for procurement.