Chapter 2: Design and installation
Alarmline II Digital Linear Heat Sensor Cable Technical Manual 17
Hazardous area installation
Note: When installing equipment in hazardous areas close liaison with the
responsible site personnel is essential.
Alarmline II Digital Sensor Cable is classified as “simple apparatus” when it
comes to Hazardous areas and does not require certification. The sensor cable
can be installed within a hazardous area provided suitable safety barriers are
used between the sensor cable and the control equipment.
The type of safety barrier shall be determined by the control equipment and
therefore close liaison with the control equipment manufacturer is required to
ensure the correct safety barrier is used. The safety barrier will be installed along
with the control equipment in a safe area.
The relevant manufacturer’s documentation should be consulted for wiring details
of barriers, configuration of monitoring equipment, etc.
To ensure that the system complies with hazardous area requirements, it is
important to consider the electrical characteristics. Each safety barrier specifies
the maximum resistance, capacitance, inductance, and L/R ratio of any
device/cable that is attached to it (these details are provided in the specification
tables in “Technical specifications” on page 5).
These characteristics may have a significant impact on the design of the system
and may limit the length of sensor cable that can be used dependent on the
safety barrier.
All terminations and connections on a hazardous area installation must be done
in suitably approved junction boxes for the type of area.
To Next Page
Loading...
Need help?
General