Siemens SIMATIC ET 200SP F-TM Equipment Manual page 29

Wiring
4.5 Connecting an encoder
Wiring the Hardware STO
STO+
STO-
Figure 4-5
Note
The supply voltage for the STO inputs must be different from that of the power supply.
Table 4- 2
The cables of the hardware STO (STO+/STO-) must be routed separately from other cables,
especially power cables.
The risk of crushing and short-circuits against earth connections must be minimized by
appropriate routing.
Premature aging of the cables due to continuous UV radiation must be ruled out.
28
Safe torque off
Supply of STO
Connection of Hardware STO
Pin assignment
Pin Designation
5 STO+
7 STO-
Function
STO input 24 V
STO input, negative connection
Equipment Manual, 02/2020, A5E47579503-AA
F-TM ServoDrive