Hardware reference guide

Intelligent/Special Purpose
382
35013379 11/2011
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.
WARNING
Hot Swapping Restriction
Modules may be hot swapped when the area is known to be non-hazardous. Do
not hot swap modules in a Class 1, Division 2 environment.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
CAUTION
User Defined Outputs
If the primary backplane power supply goes OFF and the secondary backplane
power supply remains ON the behavior of the outputs on the secondary backplane
is not guaranteed. Outputs could either go to off state or take their Time out state
as defined by the user. If the power supply of the secondary backplane goes OFF
and the primary backplane power supply remains ON , the IO Health bit of the
modules located in this backplane could indicate a healthy module. It is
recommended that all modules in the secondary backplanes, regardless of
configuration, have their Time out state configured as USER DEFINED with
VALUE 0. Additionally using the same primary power source for primary and
secondary backplanes could reduce the effect of this issue.
Failure to follow these instructions can result in injury or equipment damage.