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FlameSpec IR3 User Manual
2.12.1 General recommendations
•
In general, correctly engineered star earthing arrangements minimize earth current
crosstalk and noise, improving the reliability and performance of instrumentation.
•
The use of a single, screened / shielded cable for each field device ensures good
screening / shielding and reduces crosstalk.
2.12.2 Field Cabling
•
The entire length of the field cabling connected to a unit should be screened /
shielded. The screen / shield should be connected to a low noise instrument earth at
one end.
•
The screens / shields of field cabling must not be connected in a manner that
creates earth loops or that will result in the screens / shields carrying large currents
from heavy plant or equipment.
2.12.3 Interference and noise
•
Electrical equipment connected to the system should comply with applicable
national or international EMC standards.
•
Ideally, the 24 V supply reaching units should be free from large transients,
fluctuations or high frequency noise.
•
In order to reduce the likelihood of radio frequency interference affecting the
operation of units it is recommended that neither units nor their cabling are
installed in close proximity to the antennae of high-powered radio, radar or satellite
communication equipment.
For more information & technical support: (+1) 714-671-8500 · support@fg-detection.com
F120V0020.07
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