User's Manual

Table Of Contents
37
T12
A197910.0 en HBM
9 Electrical connection
9.1 General information
Detailed instructions for connecting the T12 to the CAN Bus or the
PROFIBUS can be found in the “T12 CAN Bus/PROFIBUS” interface
description (in pdf format) on the T12 system CD.
To make the electrical connection between the torque transducer and the
measuring amplifier, we recommend using shielded, low-capacitance
measurement cables from HBM.
With extension cables, make sure that there is a proper connection with
minimum contact resistance and good insulation. All plug connections or
swivel nuts nuts must be fully tightened.
Do not route the measurement cables parallel to power lines and control
circuits. If this cannot be avoided (in cable pits, for example), maintain a
minimum distance of 50 cm and also draw the measurement cable into a steel
tube.
Avoid transformers, motors, contactors, thyristor controls and similar
stray-field sources.
Consider longer cable of approximately 40cm due to the installation of the
wounded core (toroidal core).
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. If this is the case, it is
essential for the cables to be re-labeled!
Tape wound core (toroidal core):
To suppress high frequencies a tape wound core (toroidal core) on the power
cable has to be used. Use at least 3 loops of the cable.