10
AVAS-212 User Manual
3.
INTENDED USE
AVAS-212 has been designed for switching and distributing video,
audio, and control signals in general office and clinical or
hospital environments.
The AVAS-212 equipment has to be installed by professional users
(system integrators and OEM) according to the instructions in the
user manual.
Assuring overall system safety is the responsibility of the system
integrators and OEMs who are fully familiarized with the requirements
and safety risks applicable to the integrated system.
The AVAS-212 system and its components have CE approval and
comply with IEC60601-1-2. Installers, system integrators, and OEMs
have to mitigate system and application specific risks.
For critical systems, installers and system integrators are advised to
consider arranging additional risk control measures, like external
back-up system(s).
3.1
Application Notes
When integrating a product like AVAS-212 into safety critical
systems, the risks associated with failures in the AVAS-212 network
have to be considered. Although the system integrators and OEMs are
responsible for overall system safety (based on their expertise of the
application domain and of the overall system architecture), an analysis
has been performed to study the safety impact of AVAS-212 in
safety critical applications. The following application notes are based on
the outcome of this analysis:
When AVAS-212 is used in safety critical applications, address the risks associated with
failure of video and audio delivery due to, for instance, failures of network equipment in your risk
analysis. In these cases, consider applying fail-safe, redundant video or audio connections in parallel
to the AVAS-212 video network as a risk control measure.
AVAS-212 can transfer unprocessed video without compression.
Scaling and conversions will be applied when the video input properties (resolution, frame rate or
color scale) are not equal to the requested video output properties.
For applications in which this type of processing can result in hazardous situations due to, for instance,
image artefacts or loss of information, using the DirectDisplay mode or carefully matching video input
and video output properties is recommended to assure video transfer without any processing.
See the
AVAS-212 User API
for details of setting video input/output
properties and for
instructions to enable the DirectDisplay mode.
To avoid hazardous situations caused by mixing up video sources, adding clear visual markers to the
video input streams is recommended.
