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Description: The Allen-Bradley 20-750-S4 module is a safety module. It supports the safe torque off (STO) function. The 20-750-S4 module is compatible with Allen-Bradley PowerFlex 755/755T series drives.
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Product is surplus. Manufacturer's warranties do NOT apply.
Product is surplus. Manufacturer's warranties do NOT apply.
Allen Bradley 20-750-S4
Allen Bradley
Description: The Allen-Bradley 20-750-S4 module is a safety module. It supports the safe torque off (STO) function. The 20-750-S4 module is compatible with Allen-Bradley PowerFlex 755/755T series drives.
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20-750-S4
Description: PowerFlex AC Drive User Installed Options, Spare Parts and Demo Units
Safety kits
Integrated safety functions option
Integrated safety functions option
The product offered is sold as used surplus. Texnite is not an authorized surplus dealer or affiliate of the Manufacturer associated with this product. It's possible that the product may contain older date codes or belong to an earlier series compared to items available directly from the factory or authorized dealers. As Texnite is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply.
Although numerous Allen-Bradley PLC products may contain pre-installed firmware, Texnite does not confirm whether a PLC product has firmware or if the firmware corresponds to the revision level required for your specific application. Additionally, Texnite does not guarantee or imply your capability or entitlement to download or acquire firmware for the product from Rockwell, its distributors, or any other source. Furthermore, Texnite does not assert your right to install any such firmware on the product. Texnite neither obtains nor provides firmware on behalf of customers. It remains your responsibility to adhere to the terms stated in any End-User License Agreement or a similar document related to obtaining or installing firmware.
Technical Specifications for 20-750-S4
| Brand | Allen-Bradley / Rockwell Automation |
| Series | PowerFlex 755 |
| Part Number | 20-750-S4 |
| Product Type | Safety Module |
| Safety Feature | Safe Torque Off (STO), SS1 |
| Compatibility | PowerFlex 755/755T Drives |
| Input Type | Current Sinking Inputs |
| ON-state Voltage | 11 to 30 Volts DC |
| OFF-state Voltage | -3 to 5 Volts DC |
| Minimum OFF-state Current | 2 milliamps |
| Input Reaction Time | 10 milliseconds |
| Maximum OFF-state Current | 1.5 milliamps |
| Brand | Allen-Bradley / Rockwell Automation |
| Series | PowerFlex 755 |
| Part Number | 20-750-S4 |
| Product Type | Safety Module |
| Safety Feature | Safe Torque Off (STO), SS1 |
| Compatibility | PowerFlex 755/755T Drives |
| Input Type | Current Sinking Inputs |
| ON-state Voltage | 11 to 30 Volts DC |
| OFF-state Voltage | -3 to 5 Volts DC |
| Minimum OFF-state Current | 2 milliamps |
| Input Reaction Time | 10 milliseconds |
| Maximum OFF-state Current | 1.5 milliamps |
About 20-750-S4
The Allen-Bradley 20-750-S4 module is a built-in safety functions module. This module is made for the Allen-Bradley PowerFlex 755/755T drives. The 20-750-S4 module provides multiple safety functions including the networked safe torque off (STO) function, timed SS1 function, monitored SS1 function, and the safe brake control function. The module also supports controller based safety functions for Allen-Bradley GuardLogix 5580 and Compact GuardLogix 5380 controllers. The 20-750-S4 module can remove power from the circuits on the drive output devices, which leads to the disconnection of power to the motor, and it can be used with other safety devices for compliance with the IEC 61508 and other standards. Allen-Bradley recommends disconnecting the input power to the drive before the performance of any maintenance-related activity. This safety precaution will ensure that the drive output is not carrying dangerous voltages during maintenance.
Even though the STO feature on the Allen-Bradley 20-750-S4 PowerFlex 755/755T safety module disables the motor torque, mechanical forces such as back pressure or suspended loads can lead to motor rotation. Allen-Bradley does not recommend the use of the 20-750-S4 module as a control option for stopping or starting the drive regularly. The 20-750-S4 module is a current sinking module. The on-state voltage range is 11 to 30 Volts DC and the off-state voltage range is -3 to 5 Volts DC. The minimum on-state current rating is 2 milliamps and the maximum off-state current rating is 1.5 milliamps. The input reaction time for the 20-750-S4 module is less than 10 milliseconds. The module is UL approved and it is certified by numerous industrial standards that include the CE, TUV, and C-Tick standards. The host drive and the 20-750-S4 module should only be operated by trained technicians.
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