Schneider Electric 890USE17700 manual Preferred, Modules

					Introduction
Preferred	An island bus can also support those auto-addressable modules referred to as
Modules	preferred modules. Preferred modules do not mount in segments, but they do count
	as part of the 32-module maximum system limit.
		Note: If you want to include preferred modules in your island, you need to configure
		the island using the Advantys configuration software.
	A preferred module can connect to an island bus segment via an STB XBE 1000
	EOS module and a length of STB XCA 100x bus extension cable. Each preferred
	module has two IEEE 1394-style cable connectors, one to receive the island bus
	signals and the other to transmit them to the next module in the series. Preferred
	modules are also equipped with termination, which must be enabled if a preferred
	module is the last device on the island bus and must be disabled if other modules
	follow the preferred device on the island bus.
	Preferred modules can be chained to one another in a series, or they can connect
	to Advantys STB segments. As shown in the following figure, a preferred module
	passes the island bus communications signal from the primary segment to an
	extension segment of Advantys STB I/O modules:
		1	5	7

2 3 8 9

4 6

1primary segment

2NIM

3STB XBE 1000 EOS bus extension module

41 m length STB XCA 1002 bus extension cable

5preferred module

61 m length STB XCA 1002 bus extension cable

7extension segment of Advantys STB I/O modules

8STB XBE 1200 BOS bus extension module for the extension segment

9STB XMP 1100 termination plate

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