Pin Assignment - HBM T40S7 Mounting Instructions

Electrical Connection
also be connected extensively (also see HBM Greenline Information, brochure
i1577).
Electrical and magnetic fields often induce interference voltages in the measur­
ing circuit. Therefore:
S Use shielded, low-capacitance measurement cables only (HBM cables fulfill
both conditions).
S Only use plugs that meet EMC guidelines.
S Do not route the measurement cables parallel to power lines and control
circuits. If this is not possible, protect the measurement cable with e. g. steel
conduit.
S Avoid stray fields from transformers, motors and contact switches.
S Do not ground the transducer, amplifier and indicator more than once.
S Connect all the devices in the measuring chain to the same protective earth
conductor.
S In the case of interference due to potential differences (compensating cur­
rents), the connections between supply voltage zero and housing ground
must be broken at the amplifier and a potential equalization line established
between the stator housing and the amplifier housing (copper conductor, at
least 10 mm
S Should differences in potential between the machine rotor and stator, be­
cause of unchecked leakage, for example, cause interference, this can usu­
ally be overcome by connecting the rotor definitively to ground, e.g. with a
wire loop. The stator must be connected to the same (ground) potential.
6.3

Pin Assignment

The stator housing has two 7-pin plugs, an 8-pin plug and a 16-pin plug.
The supply voltage connections and shunt signal connections of plugs 1 and 3
are each electrically interconnected, but are protected against compensating
currents by diodes. There is also a self-resetting fuse (multifuse) to protect the
supply voltage connections against overload by the stator.
34
2
wire crosssection).
A3276-11.0 HBM: public
T40FM