ABB ACS380 - STO Wiring Principles and Examples

Wiring
For the electrical specifications of the STO connection, see the technical data of the
control unit.
￭ Connection principle
Single ACS380 drive, internal power supply
S+
+ 24 V DC
S1
S2
SGND
UDC+
UDC-
A
K
1
2
3
4
Drive1
Control unit2
Control logic3
To motor4
Activation switchK
The Safe torque off function 185