Hardware reference guide

Intelligent/Special Purpose
412
35013379 02 October 2007
Backplane
Expander
Guidelines
z The same 140XBE10000 Backplane Expander modules are used for the primary
and secondary backplanes. The end of the Backplane Expander cable marked
"Primary" always connects to the Backplane Expander module in the Primary
Backplane.
z The system can use any Quantum type power supply. Each backplane can have
a different type of power supply.
z Loss of power in the secondary backplane will not shut down the entire drop. Only
modules located in the Secondary backplane will lose power.
z Backplane expander modules can be located in any slot in the backplane and do
not have to be placed in corresponding slots in the primary and secondary
backplanes.
z I/O modules that have downloadable executive firmware, such as the ESI
module, are allowed in the secondary backplane except when downloading their
execs. Executive firmware cannot be downloaded to modules in the secondary
backplane.
z It may be necessary to update the CPU or RIO drop executive firmware. See
Executive Firmware section in the Specifications table.
z The Backplane Expander will not be recognized by the programming panel
software. It will look like an unfilled slot in the PLC I/O map.
z The Backplane Expander will allow configuration or I/O mapping of additional
modules in the local drop containing a CPU or RIO drop adapter up to the drop
word limit or physical slot address limitation.
z Option modules, such as NOMs, NOEs and CHSs must reside in the primary
backplane.
z Any Interrupt module can be located in the secondary backplane, but the interrupt
mode is not supported.
z The Backplane Expander module cannot be Hot Swapped into a powered
backplane without first attaching the communications cable. To install the
Backplane Expander in a powered backplane, first connect the cable to the
Backplane Expander module, then mount the module into the powered
backplane.
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com