ABB PVS800-57B

Control unit 77
 ABB AI523
No. Description
1. I/O bus
2. Allocation between terminal No. and signal name
3. 16 yellow LEDs show the signal status at the analog inputs (I0...I15)
4. 1 green LED shows the status of the process supply voltage UP
5. 2 red LEDs show errors
6. Label
7. I/O terminal unit (TU515/TU516) with 40 terminals (screw-type or spring terminals)
8. DIN rail