HBM PW15iA, Инструкция по монтажу, Страница: 26 / 104

Structure and mode of operation
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A4359-1.0 HBM: public
PW15iA
potential. A direct, low-ohm contact must be made
with the shield, via EMC-compliant PG cable glands,
for example.
S
Should it be necessary, a separate cable can be used
to establish potential equalization between the digital
load cell and the (PC/PLC) master (grounding con­
cept). You must not use the cable shield for this
potential equalization.
S
Use shielded, low-capacitance cables only for all con­
nections (interface, power supply and additional
devices) - (HBM measurement cables meet these
requirements).
S
Electrical and magnetic fields often induce interfer­
ence voltages in the measurement electronics. Do not
route the measurement cables parallel to power lines
and control circuits. If this is not possible, protect the
measurement cable (with steel conduits, for example).
Avoid stray fields from transformers, motors and con­
tact switches.
6.3 Supply voltage
Regulated DC voltage of +12 … +30V is required to
operate the electronics and serial communication.
Voltage source requirements
S
The supply voltage must be sufficiently smoothed
(RMS value minus residual ripple > 12 V).
S
The electronics have a low-loss controller with a
power consumption of 3 W during operation. The cur­
rent consumption is therefore dependent on the level
of the supply voltage: