ABB S800 I/O Manual page 18

Product Scope
The FCI communicates with the PROFIBUS Master, ModuleBus Modems and the
I/O modules. The FCI handles the I/O-modules operations such as read and write
data, read status and configuration of modules and channels. The FCI has a
connection to the TB842 Optical ModuleBus Port mounted on a TB806 to the left,
see Figure
The FCI provides 24 V d.c. (from the source) and an isolated 5 V d.c power to the
base cluster's I/O modules (12 maximum) by way of the ModuleBus connections.
One power source 24 V d.c. can be connected to the power terminals (L+ & L-).
The power source is supervised by the POWER OK status LED.
The size, type and direction of data to be transferred on the PROFIBUS-DP bus
depends on and is determined by the I/O module type. The FCI can be configured to
send or transmit dynamic data over the PROFIBUS-DP with cycle times in the
interval from 1 ms.
CI830 Fieldbus Communications Interface (FCI)
The CI830 Fieldbus Communication Interface (FCI) module is a configurable
communication interface for single configurations which performs operations such
as signal processing, gathering of various supervision information, OSP handling
and configuration of I/O modules. The FCI connects to a controller by way of the
PROFIBUS-DP fieldbus.
The FCI has one PROFIBUS-DP interface and uses a PROFIBUS-DP cable with a
total length of up to 1200 meters (1312 yards). Up to 32 stations can be configured
on one segment. The FCI has two rotary switches that select its address on the
fieldbus in the range of 01 to 79.
An I/O Station can consist of the FCI module, ModuleBus Modems and the I/O
modules. The FCI is the bus-master on the S800 I/O ModuleBus and communicates
with the S800 I/O modules. It is a pure "slave station" on PROFIBUS-DP which is
controlled by a master station.
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2.
Section 1 Introduction
3BSE020926-600