System Input/Output - HBM CMD Serie Bedienungsanleitung

Device description
20
The CMD is a single‐channel charge amplifier for piezo­
electric sensors. It converts the measurement signal of a
sensor (comprising an electric charge) into a proportional
voltage signal of "10 V
CSB4/1 summing box to connect up to four sensors in
parallel operation.
Important
The CMD has a compact design and good immunity from
interference. All electrical signals are galvanically iso­
lated. This means safe operation without the need for
isolating elements or grounding. Only the digital input,
digital outputs and the Reset/Measure signal are not
electrically isolated from the mains.
The specifications list the permissible limits for mechani­
cal, thermal and electrical stress. It is essential that these
are taken into account when planning the measuring set-
up, during installation and ultimately, during operation
(also see Chapter 14, "Tips for piezoelectric measure­
ment technology").
IEPE/ICP sensors (current‐fed, piezoelectric transduc­
ers) cannot be operated with the CMD.
7.1

SYSTEM input/output

The charge amplifier is supplied with voltage via this
socket (18  30 V
surement signal is output at max. "10 V
The charge amplifier is fitted with TEDS (Transducer
Electronic Data Sheet). In order to transfer TEDS infor­
mation to the downstream evaluating electronics, the
TEDS chip must first be written to (see Section 7.14).
A2781-3.1 HBM: public
. If required, you can use the
DC
) (see Section 8.2.2) and the mea­
DC
.
DC
CMD