Product Description:
In FFCS-C, communication modules are installed in I/O module slots of Node Unit, which
converts the communication I/O signals from/to the field and exchanges the converted data with
FCU. There are two types of Node Units: the ESB node unit and Optical ESB bus node unit.
Node Unit is comprised of power supply modules and bus interface modules, namely, ESB bus
slave interface modules or Optical ESB bus repeater modules.
A duplexed FCU has pairs of processor modules and power supply modules. I/O modules for
FIO and communication modules can also be installed in FCU and installing paired I/O and
communication modules will make them dual redundant. When connecting node units, a pair of
bus interface modules is installed in I/O module slots. When configuring the communication bus
as dual redundant, a pair of bus interface modules are installed.
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