Electrical Connection; Shielding Design; Option 2, Code Kf1 - HBM T10F KF1 Operating Manual

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5

Electrical connection

5.1 Shielding design

The cable screen is connected according to the HBM Greenline concept, thus
enclosing the measuring system (without rotor) in a Faraday cage (for this it is
important that the shielding on both cable ends is laid flat to the body of the
casing) and preventing potential electromagnetic interferences from affecting
the measuring signal. Special electronic coding methods are used to protect
the transmission path and the rotor from electromagnetic interferences.
In the case of interferences due to potential differences (compensating
currents), operating-voltage zero and housing ground must be disconnected
on the amplifier and a potential-equilibration line between stator housing and
amplifier housing must be established (copper conductor, 10 mm
cross-section).
If potential differences between the rotor and the stator occur in the machine,
due perhaps to unchecked leakage, and give rise to interference, the situation
is usually remedied by fully earthing the rotor, for instance with a wiper or
brush. The stator must be similarly earthed.

5.2 Option 2, code KF1

On the stator housing is a 7–pin device connector (Binder 723), to which you
connect the cable for the power supply and torque signal.
Connector
Binder 723
6 1
5 7 2
3
4
Top view
HBM
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Plug Pin assignment
Pin
1 Operating voltage zero
2 Not used
3 Preamplifier supply voltage (+15 V)
4 Torque measuring–signal (12 V
5...15 kHz)
5 Not used
6 Rotor excitation voltage (54 V/80 V
approx.15 kHz)
7 Rotor excitation voltage (0 V)
Shield on housing ground
2
wire
Wire
colour MS3106
WH
BK
BU
;
PP
RD
;
PP
GN
GY
B 23. T10F.90 en
T10F
Plug
Pin
A
B
C
D
F
G