Sto Via Power Module Terminals - Siemens SINAMICS S120 Manual

Power Modules
4.2 Blocksize Power Modules (PM240-2)
4.2.3.6

STO via Power Module terminals

PM240-2 FSD, FSE and FSF Power Modules
The Safe Torque Off (STO) safety function is used to safely disconnect the power feed to the
motor that generates the torque.
Using PM terminals - STO_A and STO_B - as well as 2 DIP switches, the "Safe Torque Off"
(STO) function can be used independent of a Control Unit using the Power Module
hardware. This hardware-based STO can be used up to PL e according to EN 13849-1 and
SIL3 according to IEC 61508 with the appropriate application engineering.
Table 4- 17
Terminal:
Type: Screw-type terminal 2 (Page 371)
Max. cross section that can be connected: 2.5 mm
Note
Using the "STO" safety function via the Power Module terminals
With enabled Safety Integrated functions of the CU310, a simultaneously active STO
function via Power Module terminals results in fault messages being output.
Note
Insulated signal cables
Signal cables that are routed in the cable duct with 600 V power cables must be insulated.
96
Terminals STO_A/STO_B for the safety function "Safe Torque Off"
Terminal
1
2
Signal name Technical data
STO_A/STO_B Voltage: 24 V DC (20.4 to 28.8 V)
Current consumption: Max. 1.0 A
M Ground
2
Manual, (GH6), 07/2016, 6SL3097-4AL00-0BP5
AC Drive