Hardware reference guide

Intelligent/Special Purpose
35013379 11/2011 381
Basic Configuration
The backplane containing the the CPU or RIO drop adapter is designated the
‘Primary’ backplane and the adjacent backplane is designated the ‘Secondary’
backplane. Each backplane requires its own power supply.
NOTE: Cable must be installed before powering up the backplanes.
CAUTION
Possible communications cable failure
Do not Hot Swap a Backplane Expander module into a powered backplane unless
the communications cable has first been connected to the module.
Failure to follow these instructions can result in injury or equipment damage.
CAUTION
Possible communications failure.
The cable is polarized. Ensure that the cable end marked "Primary" is connected
to the backplane that has the CPU or RIO adapter.
Failure to follow these instructions can result in injury or equipment damage.