Process-level automation: Freelance Rack I/O

Rack I/O is installed in conjunction with DCP10 or

DCP0 rack CPUs. Rack CPUs do not have access

to fieldbus I/O or field devices. In connection with the

AC 800F, Rack I/O is used when a rack CPU has

been replaced by the AC 800F, or if SOE functionality

is needed. In addition, I/O cycles are faster with Rack

I/O than with fieldbus. For example, up to 88 binary

signals can be updated within  ms using just one rack.

By using a well-shielded metal case for each module

and also installing EMC filters in each incoming and

outgoing lead, measures have been adopted to

comply with EMC standards without the need of

installation in cubicles. As a result, the Freelance

800F hardware meets the binding EMC standards

and bears the CE Mark. The requirements of IEC 801

and the NAMUR industrial standard have also been

fulfilled. A sophisticated test strategy, the installation

of optical inspection systems, and integrated self-test

functions ensure that the modules are highly reliable.