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7.2
Grounding and usage of grounded power supply
Connect the grounding terminal next to the cable gland to stable ground potential.
The recommended grounding is where the Dumo external grounding terminal is connected to a
nearby grounding strip.
Telltale signs of improper grounding include base values of over 3000 in clean office air or
noticeable reaction to touching the Dumo series enclosure. Note that sub-par quality power
sources might also induce such effects.
7.1
Connecting the voltage supply
Connect a 24 VDC power supply to the device in the internal connection area. Pay close attention to the
polarity of the power input.
In case of wrong polarity, the devices will not start up, however the device will not be harmed
or broken.
Risk of injury!
If the Dumo is not properly grounded, it may react to changes in the
ground potential and show false results, resulting in severe health
impacts to workers and/or a failure of the explosion prevention system.
Figure 11: Connecting power input
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