ABB AC500 PLC - Intended Purpose; Functionality

1 I/O bus
2 Allocation between terminal number and signal name
3 4 yellow LEDs to display the signal states at the analog inputs (I0 - I3)
4 4 yellow LEDs to display the signal states at the analog outputs (O0 - O3)
5 1 green LED to display the state of the process supply voltage UP
6 2 red LEDs to display errors
7 Label
8 Terminal unit
9 DIN rail
Sign for XC version
Intended Purpose
The device can be used as a decentralized I/O extension module for S500 Communication
Interface Modules (e. g. CI592-CS31, CI501-PNIO, CI541-DP, CI581-CN) or as a centralized
extension module for AC500 CPUs (PM5xx).
Functionality
4 analog inputs, individually configurable for
● Unused (default setting)
● 0 V...10 V
● -10 V...+10 V
● 0 mA...20 mA
AX521
Device Specifications
I/O Modules > Analog I/O Modules
2019/04/173ADR010121, 13, en_US520