HBM PAD4001A Operating Manual page 24

Electrical connection
22
supply. In contrast, the sustained loading is calculated
from the formula shown above.
S Connection to a wide-ranging supply network is not
permitted as this often causes interfering voltage
peaks to be induced. Instead, a local supply must be
provided for the electronics (even when grouped).
S The supply voltage must be insulated from the shield
potential. A connection from GND to the housing is
not required, but the max. potential difference must be
no more than 7 V.
S The supply voltage ground wire (GND) is also used as
the reference potential for the interface signals and
the digital inputs/outputs.
S In layouts with several PADs, the supply can run to­
gether with the RS-485 bus lines in a 6-pin cable (with
HBM junction boxes, for example). Ensure that there
is sufficient wire cross-section provided, as some
cable sections will conduct the supply current for all
the connected PADs.
A4238-1.0 HBM: public
PAD4001A/4003A