ABB AX521 User Manual

21.4 Connection
1 I/O bus
2 System LED
3 Allocation between terminal number and signal name
4 16 yellow/red LEDs to display the signal states of the digital inputs I0 to I15
5 8 Test pulse outputs T0 to T7
6 2 rotary switches for setting the PROFIsafe address
7 1 green LED to display the state of the process supply voltage UP
8 2 red LEDs to display errors
9 Label
10 Terminal unit TU582-S(-XC)
Sign for XC version
DI581-S
Connection
2019/11/153ADR024117M02xx, 11, en_US168

ABB AX521 Specifications

General

Brand	ABB
Model	AX521
Category	I/O Systems
Language	English