HBM WTX120, Operating Manual

Page: 26 / 550

Installation
24
A4500-1.1 HBM: public
WTX120
5.4.1 Connecting cables for analog load receptors
When laying scale connecting cables (analog load
receptors) please note:
S
Use only suitable scale connecting cables:
- Keep to the rated voltages of the connecting cable.
- Double-shielded cable is advantageous (braided
shield)
- The length and cross-section of the individual wires
must meet the following conditions:
Cable length (m) / cross-section (mm
@
)
270 (m/mm
@
)
- Maximum line length between load cells and
weighing terminal: 200m
S
The shield of the load cell cable must be fitted across
a large area all-round in the screwed cable gland of
the weighing terminal. This can be done with all
WTX120 variants. We additionally offer a shield rail,
both for industrial applications and for applications
subject to weights and measures legislation. The
shield must in any case be installed in the immediate
vicinity of the WTX120 (a maximum of 7 cm from the
bottom edge of the WTX120's housing).
S
The load cells and load receptors, terminal boxes and
weighing terminal must be integrated into the
equipotential bonding system. To do this, depending
on the local conditions it may be necessary to lay a
separate equipotential bonding line with a
corresponding cross-section (e.g. 16mm
@
).
S
Use only metal terminal boxes to extend cables, and
fit the shielding for both cables in the screwed cable
glands.