ABB CI521-MODTCP User Manual

20.4 Connection
1 I/O bus
2 Allocation between terminal number and signal name
3 32 yellow LEDs to display the signal states at the digital inputs I0 to I31
4 1 green LEDs to display the states of the process supply voltage UP
5 4 red LEDs to display errors
6 Label
7 Terminal unit
Sign for XC version
All I/O channels (digital and analog) are protected against reverse polarity,
reverse supply and continuous overvoltage up to 30 VDC.
DI524
Connection
2019/11/153ADR024117M02xx, 11, en_US162

ABB CI521-MODTCP Specifications

General

Brand	ABB
Model	CI521-MODTCP
Category	I/O Systems
Language	English