Wiring Examples - ABB ACS355 series User Manual

420 Appendix: Safe torque off (STO)

Wiring examples

An example of a Safe torque off wiring with internal +24 V DC power supply is shown
below.
ACS355
X1C: OUT1
X1C: OUT2
X1C:3 IN1
X1C:4 IN2
X1A:SCR
An example of a Safe torque off wiring with external +24 V DC power supply is shown
below.
ACS355
X1A:GND
X1C:1 OUT1
X1C:2 OUT2
X1C:3 IN1
X1C:4 IN2
X1A:SCR
For information on the specifications of the STO input, see section
data (page 385).
13 23 31
14 24 32
+24 V DC external
power supply
-
+
13 23 31
14 24 32
Y1 Y2
Safety relay
A1 A2
Y1 Y2
Safety relay
A1 A2
Safe PLC
OUT
GND
Safe PLC
OUT
GND
Control connection