Tb815 Interconnection Unit - ABB S800 I/O User Manual

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The FCI communicates with the Advant Controller, and the I/O modules. The FCI
handles the I/O module operations such as read and write data, read status and
configuration of modules and channels. The CI820 FCI has an electrical ModuleBus
connector that plugs into the TB815 Interconnection Unit. The TB815 provides an
electrical ModuleBus connection (via a TK801Vxx extension cable) to the TB806
Cable Adaptor In Module at the I/O modules, and to the TB810/TB811 Optical
ModuleBus Port. See Figure 1-8 for the layout of the redundant FCI with the
TB815.
The FCI provides 24V d.c. (from the source) and an isolated 5V d.c. power to the
base cluster's I/O modules (12 maximum) by way of the electrical ModuleBus
connections. One power source (single or redundant 24 V d.c.) can be connected to
the power terminals (L+ & L-) of the FCI.
1:1 redundant power sources can be supervised by connecting the power sources
POWER OK status signals to terminals SA and SB.
The size, type and direction of data to be transferred on the AF 100 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 AF 100 with cycle times in the interval of 1 to
4096 ms.
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