Electrical Connection; General Information; Emc Protection - HBM T40S7 Mounting Instructions

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 cable connectors or swivel nuts must be fully tightened.
Important
Transducer connection cables from HBM with plugs attached are identified in
accordance with their intended purpose (Md or n). When cables are shortened,
inserted into cable ducts or installed in control cabinets, this identification can
get lost or become concealed. So the cables must be marked beforehand, just
in case.
6.2

EMC protection

Important
The transducers are EMC-tested in accordance with EC directives and identi­
fied by CE certification. However, you must connect the shield of the connec­
tion cable on the shielding electronics enclosure in order to achieve EMC pro­
tection 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
EMC­proof shield should be applied in the wire area, and this shielding should
T40FM
A3276-11.0 HBM: public
Electrical Connection
33