ABB CI856 COMMUNICATIONS - AC 800M COMMUNICATION INTERFACES

S100 I/O communication is realized in AC 800M by communication interface CI856,

which is connected to the CEX-Bus through a base plate. 

The baseplate, TP856, houses a ribbon connector connecting to bus extender boards in S100 I/O racks and provides 

a simple DIN-rail mounting. Up to five S100 I/O racks can be connected to one CI856 

where each I/O rack can hold up to 20 I/O boards. 

The CI856 is powered by the processor unit, via the CEX-Bus, and therefore does not require any additional 

external power source. Features and benefits A key benefit with the CI856 interface is the possibility 

to reuse the majority of the existing I/O installation, including terminations and field wiring 

in existing ABB Master and Advant OCS installations. 

Single connection to S100 I/O units located in up to five I/O racks Code locking device 

to prevent mounting of incompatible components Hot swap functionality

Document conventions

A particular convention may not be used in this manual.

• Abbreviations and acronyms in this manual are spelled out in the glossary. The

glossary also contains definitions of important terms.

• Push-button navigation in the LHMI menu structure is presented by using the push-button icons.

To navigate between the options, use and .

• HMI menu paths are presented in bold.

Select Main menu/Settings.

• LHMI messages are shown in Courier font.

To save the changes in non-volatile memory, select Yes and press .

• Parameter names are shown in italics.

The function can be enabled and disabled with the Operation setting.

• Parameter values are indicated with quotation marks.

The corresponding parameter values are "On" and "Off".

• IED input/output messages and monitored data names are shown in Courier font.

When the function starts, the START output is set to TRUE.