Installation guide

Commissioning
890USE17100 September 2003 89
Definition Hot swapping is the ability to replace an I/O module in a base unit while the island
is under power without disrupting the normal operations of the other modules on the
island. The Advantys STB island bus allows you to hot swap most I/O modules from
their bases.
Advantys STB modules that cannot be hot swapped:
DANGER
ELECTRIC SHOCK HAZARD
When removing or inserting a module into a base on an island that has
power, use only your hands. Do not use metal tools, they can come in
contact with dangerous live voltage. Also, remove any plugs that are
attached to the module before removing.
Failure to follow this precaution will result in death, serious injury,
or equipment damage.
Modules that Can’t Be
Hot Swapped
Reasons
The NIM A NIM must be present and operational to manage
communications on the island bus and to supply logic power
across the primary segment of the island. Also, the design of the
NIMs is such that the module cannot be removed from its base.
Advantys STB I/O
modules that have been
designated Mandatory
(Mandatory designation
is only available through
the use of the Advantys
configuration software)
By definition, when a mandatory I/O module is removed from the
island, all the other I/O modules will go to their fallback states, and
the island will not be operational. If a mandatory I/O module is
swapped out of the island bus, normal bus operations will be
disrupted.
PDMs PDMs must be present and operational in order for field power and
PE to be available to a voltage group of I/O modules on the island
bus.
BOS Modules A BOS module must be present and operational in an extension
segment to extend island bus communications.
EOS Modules An EOS module must be present and operational at the end of an
island segment whenever you need to extend island
communications to any extension segments or preferred devices.
CANopen extension
module
A CANopen extension module must be present and operational at
the end of an island segment whenever you need to extend island
communications to any standard CANopen device.