The Field Communication Unit (FCU) is a data concentrator that continuously polls data from field devices such as radar and servo tank gauges from different vendors, data acquisition units, I/O Modules, other FCU's, Enraf® CIU's etc and stores data in a buffer memory.
The FCU can service requests from a wide range of hosts / DCS systems such as Rosemount TankMaster, Enraf® Entis, Yokogawa®, ABB®, Honeywell®, Foxboro®, among others (it is possible to connect any system using Modbus protocol).
The FCU 2165 has 10 ports and the FCU 2175 can be ordered with 8, 16, 24 or 32 ports. Each of the ports can be configured either as a master or slave connection, providing ultimate configuration flexibility.
The number of devices per port varies between different manufacturers and may also have physical limitations. Maximum 256 devices can be supported by one FCU 2165/2175.
