HBM PW15AHi, Инструкция по монтажу, Страница: 16 / 72

PW15AHi
16
A2526-4.0 en/de/fr HBM
NOTES:

The housing of the PW15AHi load cell is connected to the cable shield via
the connector socket. To obtain an EMC‐compliant connection
(EMC = electromagnetic compatibility), the shield of this cable must be
connected to the housing of the connected device or to ground potential.
The shield must be connected directly and with low impedance (e.g. with
EMC‐compliant PG bushings).

Use shielded, low‐capacitance cables only for all connections (interfaces,
supply and auxiliary equipment) - (HBM measurement cables fulfill these
requirements).

Electrical and magnetic fields often induce interference 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 contact switches.

Should it be necessary, a separate cable can be used to establish potential
equalization between the PW15AHi and the (PC/PLC) master (grounding
concept). The cable shielding must not be used for this potential
equalization.
6.2 Supply voltage
Regulated dc voltage of +12 to +30 V is required to operate the measurement
electronics and serial communication.
Voltage source requirements:

The supply voltage must be sufficiently smoothed (effective value minus
residual ripple > 12 V).

The PW15AHi electronics have a low‐loss control with a power consumption
of 1.5 W during operation. The current consumption is therefore dependent
on the level of the supply voltage:
] [
1.5
] [
V Voltage
W
A f Power requirement


When switched on, the electronics briefly consume a current of approx.
0.15 A. To ensure a safe start‐up, the power supply must be able to provide
this current without a limit being triggered. It is particularly important to take
this into consideration when supplying several PW15AHi load cells from a
single power supply unit. In contrast, the sustained loading is calculated
from the formula shown above.