Danfoss iC7 Series Operating Manual page 11

iC7 Series Functional Safety
Operating Guide
External safety
device
X31 S.INA+
R
X32 S.INA–
STO inputs
X31 S.INB+
R
X32 S.INB–
Illustration 3: STO Feedback Example (1/2)
It can also be used as a digital output for providing a status signal. In this case the load could be a digital input of a PLC.
Control Card
41
+24V
44
+STO feedback
48
–STO feedback
Load
45
GND
Illustration 4: STO Feedback Example (2/2)
The STO feedback works similar to a contactor which is closed as soon as both STO input channels are de-energized.
Danfoss A/S © 2023.03
Supply
X31 S.FB+
R
X32 S.FB–
STO feedback
iC7 Functional Safety
AQ319741840653en-000201 / 136R0268 | 11