Installation guide

Site Requirements
890USE17100 September 2003 19
I/O Modules in a
Segment
The primary segment is where the NIM resides. It supports as many I/Os whose total
logic bus current is less than 1.2 A.
System wide, an island bus can support up 32 auto-addressable I/O modules, some
or all of which may be Advantys STB I/O.
The system supports a maximum of six extension segments. An extension segment
can support up to as many I/O whose total logic bus current is less than 1.2 A, up to
the system maximum of 32 I/O modules.
Extension segments are connected with each other in series using a combination of
special extension modules and extension cables. The following illustration shows
how a primary segment and two extension segments can be connected in series.
1 The primary segment
2 The NIM
3 An STB XBE 1000 EOS bus extension module on a STB XBA 2400 base
4 A 1 m length of STB XCA 1002 bus extension cable
5 The first extension segment
6 The STB XBE 1200 BOS bus extension module ( on a STB XBA 2300 base) for the first
extension segment
7 Another STB XBE 1000 EOS extension module
8 A 4.5 m length of STB XCA 1003 bus extension cable
9 The second extension segment
10 The STB XBE 1200 BOS bus extension module for the second extension segment
11 The STB XMP 1100 termination plate
The extension modules are the STB XBE 1000 EOS module, which is the last
module in a segment from which the bus is extended, the STB XBE 1200 BOS
module, the first module in each extension segment. These modules are connected
together by lengths of STB XCA 100x Advantys STB bus extension cable (See
Advantys STB Bus Extension Cables, p. 18).
1
2 3
5
4
6 7
9
8
10 11