Product image is representative; revision or series may vary.
Contact us to request a specific version.
Contact us to request a specific version.
20-750-S3 Allen-Bradley
Original price
$1,099.86
-
Original price
$2,388.75
Original price
$2,388.75
$1,099.86
-
$2,388.75
Current price
$2,388.75
Trusted By
Product Details
Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.
Product Overview
The 20-750-S3 is an Allen-Bradley PowerFlex 750-Series Integrated Safe Torque Off (STO) option module. It enables both networked STO over EtherNet/IP and hard-wired STO functionality when installed within PowerFlex 755 or 755T drives. In a control system, it provides a safety interlock to disable drive torque, meeting functional safety requirements. Common applications include machine safeguarding, safety shutdowns during maintenance or fault conditions, and integration within SIL and ISO 13849-1 safety architectures.
Best Suited For
- PowerFlex 755 and 755T variable-frequency drive systems
- Functional safety implementations up to SIL CL3 / PLe
- EtherNet/IP-based safety network architectures
- Hardwired safety circuits for STO control
- Slot installation in drive option module ports (typically slots 4-6)
Safety category
Cat. 3, PLe (ISO 13849-1); SIL CL3 (IEC 61508)
Input voltage range
11-30 V DC
Supported STO methods
EtherNet/IP-based and hardwired
Operating temperature
0 °C to 40 °C
Technical Specifications
I/O & Electrical
Power supply (user I/O)
24 V DC ±10%, PELV or SELV
Input type
Current sinking
On-state input voltage
11-30 V, 3.5 mA DC
Off-state input, max voltage
5 V, 3.5 mA DC
On-state input, min current
3.3 mA
Off-state input, max current
1.3 mA
Communication & Power
Networked STO
EtherNet/IP-based communication
Hardwired STO
Terminal block wiring (SP+, SP-, SE+, SE-)
Physical & Environmental
Operating temperature
0 °C to 40 °C
Storage temperature
-40 °C to 70 °C
Storage/Operating humidity
≤ 80 % RH, non-condensing
Certifications
cULusCE
