Hardware reference guide

Intelligent/Special Purpose
35013379 02 October 2007 411
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 this instruction 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 this instruction can result in injury or equipment damage.
CAUTION
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 this instruction
can result in death, serious injury, or equip-
ment
damage.
WARNING
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 guar-
anteed. 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 config-
ured 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 this instruction can result in injury or equipment damage.
CAUTION
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com