ABB | CI857 | AC 800M Communication Interface

Description

The ABB CI857 (model CI857K01 3BSE018144R1) is a communication interface module for the AC 800M controller, designed to enable seamless access to a wide range of field devices, third-party systems, and legacy equipment. It features a rich set of interfaces, including Ethernet interfaces/protocols, serial communication ports, and dedicated links for ABB devices and legacy systems, supporting flexible integration in industrial automation setups.

Key technical specifications include device connection limits: each AC 800M with PM864 or PM866 can support up to 256 MCU or other INSUM devices, while units with PM861 support up to 128 such devices. A single AC 800M can accommodate a maximum of 6 CI857 modules, with each CI857 capable of connecting to 128 MCU or other INSUM devices, plus up to 2 INSUM TCP/IP gateways. Each gateway supports 128 INSUM devices and four LonWorks subnets.

The module supports advanced features like enhanced function integration, multi-point configuration, time distribution, and time stamping, and leverages standard Ethernet technology for extended communication distances. Its typical closed-loop operation speed is 500 milliseconds, based on a 250 millisecond control cycle time. Powered via the CEX bus by the processor unit, it requires no external power supply, and comes with a CI857 communication interface and TP853 backplane with a width of 60 millimeters, weighing 0.63 kg.