HBM WE2108 Series, Reference Manual

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WE2108
HBM A1632-2.0 en
2 Commissioning
The permissible supply voltage for the WE2108 is in the range from
+10...35 V DC and must be filtered sufficiently (rms value less residual ripple
> 10 V).
As an accessory component, a power supply unit 100 ... 240 V is available
(HBM order no. 1−AC/DC15V/550mA).
With correct connection with shielded cables the WE2108 corresponds to the
relevant European standards and bears the CE mark.
2.1 Notes on cabling
The use of unscreened voltage supply cables is permissible only for cables
with a length of up to 30 m max., which are laid within a building. In the case
of greater cable lengths, or installation outside buildings, a screened cable
must be used.
In order to compensate for potential differences, the metal housing of
WE2108s and WE2108M has to be connected via a low ohmic compensation
conductor with the scale components as well as with the ground potential of
the connected units. This is not necessary if a potential difference of 35 V is
not exceeded.
In the unit, the reference ground (GND) for all signals and the supply voltage
is connected directly to the cable screen connection, but not to the housing.