Redundancy

With Vertex-Pro dual-redundant models, the CPU modules operate in a special master/slave

configuration, using synchronized memory and one-millisecond transfers to ensure bumpless transfers,

and allow on-line repairs, and program changes, to increase overall system availability. These models

allow for automatic and/or manual transfers between the two sets of modules in cases of external I/O,

internal module, or input power failures. Dual-redundant models allow any module to be replaced while

the unit is operating on-line. Annunciation of any control failure or transfer is provided through all

communication links and event logs.

Configurability

The following I/O list is utilized by Vertex-Pro models only. Vertex-Pro-C models are customized to the

specific application and may use the same, or more or less I/O signals, depending on the application.

Vertex-Pro inputs and outputs (I/O) are arranged into pre-defined and configurable groups. Pre-defined

I/O is fixed based on its use in all or most applications. Configurable I/O is selected based on the specific

needs of each application.