Safe Brake Relay Connection; Sto Via Power Module Terminals - Siemens SINAMICS S120 Equipment Manual

Power Modules
5.2 Blocksize Power Modules (PM240-2)
5.2.3.5

Safe brake relay connection

Table 5- 16
Note
For additional information, see Section "Option module Safe Brake Relay (Page 338)".
5.2.3.6

STO via Power Module terminals

PM240-2 Power Modules, FSD to FSG
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 5- 17
Type: Screw terminal 2 (Page 384)
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.
92
Connector
Terminal
1
2
Terminals STO_A/STO_B for the safety function "Safe Torque Off"
Terminal
1
2
Designation Technical data
Low Low signal Safe Brake Relay to PM240-2
High High signal Safe Brake Relay to PM240-2
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
Manual, 06/2019, 6SL3097-5AL00-0BP1
AC Drive