Installation guide

Site Requirements
890USE17100 September 2003 17
Extending the Island
Summary Advantys STB allows you to extend the island bus out to multiple segments of I/O
modules along a single DIN rail or on separate DIN rails. The DIN rail can support
Advantys STB I/O modules or preferred modules. Standard CANopen devices are
extended beyond the island segments.These bus extensions enable you to install
the I/O in close proximity to the sensors and actuators they control. An Advantys
STB island can support up to 32 I/O modules—including Advantys I/O, preferred
modules, and CANopen devices.
Segments on an
Island
An island can comprise up to seven segments of Advantys STB I/O—the primary
segment and as many as six extension segments. The primary segment is always
a necessary part of the island architecture. Extension segments are optional.
Length of an
Island Bus
The maximum length permissible for an island bus is 15 m (49.2 ft) end-to-end. This
length must take into consideration:
The width of all Advantys modules on all segments
The width of all preferred modules on the island bus
All extension cables between the segments and the standalone modules
This 15 m maximum length does not include the space required for external devices
such as source power supplies and the wiring between these devices and the island.
Note: The use of CANopen devices on systems using 800 kBd reduces the
maximum length to 6.5 m (21.3 ft).