Frame N×R8I Inverter Unit (Internal Power Supply) - ABB ACS880-37 Hardware Manual

226 The Safe torque off function
Frame n×R8i inverter unit (internal power supply)

Control unit
+24 V
Inverter module
STO OUT (X51)
XSTO
OUT1
SGND
IN1
IN2
XSTO OUT
IN1
SGND
IN2
SGND
STO IN (X52)
24VDC CH1
GND CH1
24VDC CH2
GND CH2
FE
24VDC CH1
GND CH1
24VDC CH2
GND CH2
FE
Inverter module
STO IN (X52)
24VDC CH1
GND CH1
24VDC CH2
GND CH2
FE
STO OUT (X51)
24VDC CH1
GND CH1
24VDC CH2
GND CH2
FE
To next
inverter module
K