Rockwell Automation 1738-ADNX ArmorPoint I/O DeviceNet Adapters - Manual (Page 21)

Publication 1738-UM001A-EN-P - February 2005
What Is the ArmorPoint DeviceNet Adapter? 2-5
Remove and Reinsert Modules on the Backplane
Removal and Insertion Under Power (RIUP) is not recommended in a
ArmorPoint System because of the following reasons.
• Removing a module breaks the IP67 seal.
• Removing a module breaks the backplane bus. Modules to the
right of the removed module will be ‘lost’ to the adapter. Also,
the terminating resistor will be removed, causing system
uncertainty.
• Inserting a module under power may cause the adjacent module
to reset due to the addition of a large capacitive load on the
power bus.
If you must remove and reinsert modules, we recommend the
following:
• Do not move I/O modules to different locations on the
mounting base after they have been installed and configured.
• If adjacent modules (i.e., 2 or more) are removed from the
backplane, replace all of them before attempting to operate the
ArmorPoint I/O system. Input data will hold last state until all
previously removed modules are replaced.
– If adjacent modules are removed and all but one is returned,
the adapter cannot verify the location of the returned
modules. For example, if modules are removed from nodes 3
and 4 and only the module from node 4 is returned, the
adapter cannot verify the location. In this case, the adapter
alerts you via a flashing red PointBus status LED that it cannot
verify the presence of modules in the affected locations. I/O
data will not be exchanged with this node until both modules
have been reinserted.
– If modules of different types are removed and returned to
the wrong locations, the adapter identifies the returned
modules and alerts you (via RSNetWorx for DeviceNet) that
the error has occurred and must be corrected.
IMPORTANT
If the module is removed while it is under power, all
the modules to the right of the removed module will
disconnect from the PointBus and field power until
the module is reinstalled.