Single Inverter Unit (Internal Power Supply); Dual-Channel Connection; Single-Channel Connection - ABB ACS880-104 Hardware Manual

312 The Safe torque off function

Single inverter unit (internal power supply)



Dual-channel connection

Inverter unit
Control unit
Control logic

Single-channel connection

Inverter unit
Control unit
Notes:
• Both STO inputs (IN1, IN2) must be connected to the activation switch. Otherwise, no SIL/PL
classification is given.
• Pay special attention to avoiding any potential failure modes for the wiring. For example, use shielded
cable. For measures for fault exclusion of wiring, see eg. EN ISO 13849-2:2012, table D.4.
OUT1
+24 V
SGND
IN1
IN2
UDC+
A
UDC–
OUT1
+24 V
SGND
IN1
IN2
T1/U, T2/V, T3/W
K
K