Schneider Electric 890USE17700 manual Extension, Segments

Introduction

Extension	When you are using a standard NIM, Advantys STB I/O modules that do not reside
Segments	in the primary segment can be installed in extension segments. Extension segments
	are optional segments that enable an island to be a truly distributed I/O system. The
	island bus can support as many as six extension segments.
	Special extension modules and extension cables are used to connect segments in
	a series. The extension modules are:
		the STB XBE 1000 EOS module, which is the last module in a segment if the
	￿island bus is extended
		the STB XBE 1200 BOS module, which is the first module in an extension
		segment
	The BOS module has a built-in 24-to-5 VDC power supply similar to the NIM. The
	BOS power supply also provides 1.2 A of logic power to the STB I/O modules in an
	extension segment.
	Extension modules are connected by lengths of STB XCA 100x cable that extend
	the island communication bus from the previous segment to the next BOS module:
		1	5

2 3 6 7

4

8

9

10 11

1primary segment

2NIM

3STB XBE 1000 EOS bus extension module

41 m length STB XCA 1002 bus extension cable

5first extension segment

6STB XBE 1200 BOS bus extension module for the first extension segment

7another STB XBE 1000 EOS extension module

84.5 m length STB XCA 1003 bus extension cable

9second extension segment

10STB XBE 1200 BOS bus extension module for the second extension segment

11STB XMP 1100 termination plate

Bus extension cables are available in various lengths, ranging from 0.3 m (1 ft) to 14.0 m (45.9 ft).

16 890USE17700 April 2004