Electrical connection
T40FH
A4429-3.0
HBM: public
31
6
Electrical connection
6.1
General information
S
With extension cables, make sure that there is a proper connection with
minimum contact resistance and good insulation.
S
All plug connections or swivel nuts must be fully tightened.
Important
Transducer connection cables from HBM with attached connectors are marked
in accordance with their intended purpose (Md or n). When cables are short
ened, inserted into cable ducts or installed in control cabinets, this marking can
be lost or hidden. So the cables must be marked beforehand, just in case.
6.2
EMC protection
Important
Transducers are EMC-tested in accordance with EC directives and identified by
CE certification. However, you must connect the shield of the connection cable
on the shielding electronics enclosure in order to achieve EMC protection for
the measuring chain.
Special electronic coding methods are used to protect the purely digital signal
transmission between the transmitter head and the rotor from electromagnetic
interference.
The cable shield is connected with the transducer housing. This encloses the
measurement system (without the rotor) in a Faraday cage when the shield is
laid flat at both ends of the cable. With other connection techniques, an EMC-
proof shield should be applied in the wire area and this shielding should also be
laid flat (
also see HBM Greenline Information, brochure i1577
).
