Baumer BA DACU 820 - Handbuch (Seite 11)

DACU_820_BA_V2_1M.doc 21/40 Baumer Electric AG
Frauenfeld, Switzerland
DACU_820_BA_V2_1M.doc 22/40 Baumer Electric AG
Frauenfeld, Switzerland
1 Functional Description
The DACU 820 is a multi-range charge amplifier for industrial use. It converts the charge which is
output by one piezo-electric sensor into two proportional voltage signals. The measuring range of both
output signals can be set separately. The DACU 820 is especially suitable in combination with the
high resolution strain sensor DSPN. Clamping force measurement and mold protection on injection
molding machines can be realized contemporaneously without switching the measuring range. Here
the most important features:
• small drift of measuring chain because of compensated input offset voltage
• robust die cast aluminum housing
• 3 fix ranges 100.000pC – 500.000pC (Channel 1)
• 1 adjustable range 100.000pC – 500.000pC (Channel 1)
• 4 fix ranges 2.000pC – 20.000pC (Channel 2)
• test function
• peak value memory
• adjustable limits with switching outputs
• RS232 Interface
• Supply voltage range 10 to 40V
• Polarity change-over of the output signals
2 Safety and operating notes
2.1 Use as specified
• The charge amplifier must be operated exclusively at the specified purposes.
2.2 Putting into operation
• The charge amplifier must be mounted only by a qualified electrician.
• Wiring on the plug or in the control cabinet must be carried out only in the off-power state.
• Follow the machine manufacturer's instructions.
2.3 Safety notes
• Before the system is put into operation, check all electrical connections.
• If the mounting, electrical connection or other work on the charge amplifier is not carried out
correctly, wrong functioning or failure of the charge amplifier may result.
• Danger to personnel and damage to the system and operating equipment because of failure or
wrong functioning of the charge amplifier must be excluded by suitable safety actions.
• The charge amplifier must not be operated outside the limits which are given in the Technical
Data (see Section 7 Technical Data).
Failure to observe the safety notes can result in wrong functioning and material and
personal damage!
2.4 Transport and storage
• Transport and storage only in original packing
• Do not let the charge amplifier fall or allow it to be shaken vigorously
2.5 Organizational actions
• Ensure that the personnel have read and understood the operating instructions, particularly the
section "Safety and operating notes".
• In addition to the operating instructions, generally applicable legal and other binding regulations
for accident prevention and environmental protection must be reliably observed.