Connection; Notes On Cable Routing; Connection Technique - HBM C2 Montageanleitung

22
4

Connection

4.1 Notes on cable routing

Electrical and magnetic fields often cause the introduction of disturbing volt-
ages into the measuring circuit.
Please note the following hints:
• Use only screened, low capacitance measuring cable (cable from HBM ful-
fils these requirements).
• Do not lay the measuring cable parallel to power and control lines. If this is
not possible (e.g. in cable ducts), the measuring cable can be protected,
e.g. by steel conduit.
• The stray fields of transformers, motors and contactors must be avoided.

4.2 Connection technique

Strain-gage based load cells can be connected to:
• carrier frequency
• DC-measuring amplifiers.
The transducer connection is implemented using the six-wire technique. The
connection assignment can be taken from the following illustration.
Wiring code (6-wire−technique)
Fig. 4.1: Transducer with six-core cable
HBM
gy (grey) Sense
bk (black) Excitation (−)
wh (white) Signal (+)
bu (blue) Excitation (+)
gr (green) Sense
rd (red) Signal (−)
(−) Shield / wire strand connected with housing
C2
A1683-1.0 de/en/fr