Allen-Bradley 20-750-S1

Allen-Bradley 20-750-S1 Safe Speed Monitor Module for PowerFlex 750

Overview

The Allen-Bradley 20-750-S1 is a Safe Speed Monitor (SSM) module designed for use with PowerFlex 750-Series AC drives, enabling functional safety capabilities in accordance with industry standards. This option module allows safe speed, direction, and stop monitoring—supporting advanced safety functions without requiring external encoders or relays.

Key Features

• Enables safety-rated speed monitoring for PowerFlex 750 drives

• Supports Safe Stop 1 (SS1), Safe Stop 2 (SS2), Safe Limited Speed (SLS), and Safe Direction (SDI)

• Five digital safety-rated inputs

• Three sets of safety-rated relay outputs

• One bipolar safety output

• Helps achieve up to SIL 3 / PLe safety integrity levels

• Reduces system wiring and complexity

Technical Specifications

• Manufacturer: Allen-Bradley / Rockwell Automation

• Part Number: 20-750-S1

• Module Type: Safe Speed Monitor (SSM)

• Drive Compatibility: PowerFlex 750-Series (e.g., 753, 755)

• Safety Inputs: 5 digital inputs

• Safety Outputs: 3 relay output sets, 1 bipolar output

• Certifications: SIL 3 (IEC 61508), PLe (ISO 13849-1)

• Power Supply: Powered through the drive backplane

• Mounting: Internal drive-mounted option

Applications

• Functional safety in industrial automation

• Packaging, material handling, and heavy machinery

• Applications requiring safe speed and direction monitoring

• Safety zones with reduced risk and downtime

Benefits

• Helps achieve compliance with global safety standards

• Reduces need for external safety relays

• Improves personnel protection and productivity

• Simplifies design and speeds up commissioning

• Integrated safety reduces panel space

Shipping & Availability

The Allen-Bradley 20-750-S1 Safe Speed Monitor Module is available for immediate shipping worldwide. 

PowerFlex 750-Series I/O, Feedback & Power Option Modules

Allen-Bradley Industrial Automation Products

NEW product in original sealed packaging. The product may be of older version or design. The packaging may have markings, signs of discoloration, and wear. DDPARTSSOLUTION Warranty: 1 Year. Manufacturer's Warranty and Support NEVER apply