Space Around Antennas (Plastic); Space Around Antennas (Metal) - Advantech B+B SmartWorx LR77 v2 User Manual

5.5 Mounting recommendations
possibility to be put on a work surface,
DIN rail EN 60715 with included plastic or metal clip.
For the most of applications with a built-in router in a switch board it is possible to recognize
two kinds of environments:
no public and industry environment of low voltage with high interference,
public environment of low voltage without high interference.
For both of these environments it is possible to mount router to a switch board, the following
there is no need to have examination immunity or issues in connection with EMC according to
EN 60439-1 ed.2:00 + A1:04.
Attention: If the negative pole of the router is grounded, there is no protection against
reversed polarity!
Compliance of EN 60439-1 ed.2:00 + A1:04 specification it is necessary to observe next
assembly of the router to the switch – board:
For whip antennas we recommend to observe a distance of 6 cm from cables and metal
surfaces on every side due to the elimination of interference. While using an external
antenna except for the switch-board it is necessary to fit a lightening conductor.
Before mounting a router on sheet-steel we recommend using a "cable" antenna.
Figure 14: Space around antennas (plastic) Figure 15: Space around antennas (metal)
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LR77 v2