Basic information
Item No. 3BSE018103R1 (CI853K01)
Communication protocols COMLI and MODBUS RTU
Master or slave master/slave
Number of channels 2
Transmission speed 75-19 200 barrels per second
Line redundancy is not
Module redundancy is not
Hot swap Yes
Used with HI controller Yes
Detailed data
The maximum number of units on the CEX bus 12
Connector RJ-45 Female (8 pins)
24 V (typical value) consumes 100 MA

CI853 RS-232 Module Protocol:
COMLI can be used on the built-in COM3 port or optionally on the CI853 port. The use of fiber optic converters can greatly extend the cable length (to several kilometers). RS-232C is a standard communication interface for serial communication with COMLI. The CI853 supports hot swap. COMLI is an ABB protocol for data transfer between controllers. It is designed for asynchronous master/slave communication with half duplex. The COMLI protocol supports dial-up modems controlled from an application. The CI853 supports master/slave mode in COMLI.

MODBUS RTU is widely used for its ease of use and reliability. Modbus RTU is an open serial (RS-232 or RS-485) protocol with a source autonomous/slave architecture that exchanges information in half duplex mode. The Modbus function can be configured on the COM port of the AC 800M and CI853. Module redundancy is not available in MODBUS RTU. The CI853 supports only Master mode in MODBUS RTU.

Characteristics and advantages
COMLI can be used on the built-in COM3 port or optionally on the CI853 port. RS-232C is a standard communication interface for serial communication with COMLI. The CI853 supports hot swap. COMLI is an ABB protocol for data transfer between controllers.
MODBUS RTU is an open serial (RS-232 or RS-485) protocol with a source autonomous/slave architecture that exchanges information in half duplex mode. The Modbus function can be configured on the COM port of the AC 800M and CI853.
The Siemens 3964R can be used with a built-in COM3 port or optionally with a CI853 port. A standard RS-232C/485 communication channel is required.
Custom serial communication can be used on the built-in COM3 port (on the AC 800M controller) or optionally on the CI853 port.
The CI853 module also supports hot swap.