MSA 9010 LCD, Руководство по эксплуатации

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Control Unit Models 9010 LCD and 9020 LCD 12
Installation
MSA
GB
Check the ELECTRICAL CONNECTIONS DIAGRAM in order to identify the line connection ter-
minals L, N and EARTH. The Control Unit 9010/20 LCD is protected on the supply line by fuse F1
whose value is determined by the feed voltage, and in particular:
Fuse F1 - 250 mA for 230 VAC supply
Fuse F1 - 500 mA for 115 VAC supply
The electrical supply must not present variations in voltage greater than those indicated, sudden
flickers of voltage due to the connection of electrical loads of substantial magnitude, electrical dis-
turbances caused by inductive and capacitive loads and incorrect contacts.
MSA shall not be held liable for malfunctions and/or damage caused by electrical disturbances
that are due to natural phenomena [e.g. lightning strikes].
We recommend protecting the equipment using appropriate external switches [automatic switch-
es, differential switches] as close as possible to the equipment; the switches should be identified
by their function and should conform to the standards IEC 60947-1 and IEC 60947-3.
The 9010/20 LCD boards were tested and developed in compliance with the EMC directives and
the prevailing standards EMC [EN 50270]. In order to guarantee conformity with the EMC
standards, several rules need to be observed during the installation phase:
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Provide an earth connection or an equipotential connection without defects.
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Use an external energy source conforming to the EMC directives, use split EMC mains filters
for AC voltage feeds [115/230] and/or DC voltage feeds [24].
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Use diagrammed cables for DC supply [24 VDC] and for the sensors/transmitters, also the
control cables [reset, output 4/20 mA, RS485] need to be shielded.
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Use cables diagrammed with a minimum shielding of 80%, avoid junctions, use boxes of the
shielded type.
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Keep the signal cables separate from the supply cables, with a distance of at least 30 cm.
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External devices used [horns, flashers, motors, etc.] must by shielded from the radio frequen-
cies and conform to the EMC directives.
-
Avoid installations in areas with a presence of strong electromagnetic fields.
DC power supply
Predisposition for 24 VDC power supply from external sources
The appropriately configured Control Units 9010/20 LCD can be supplied with either AC or DC
current. If both of the feeds are present, the DC current automatically takes over for AC when the
latter is lacking and vice-versa, without any discontinuity in operation.
Make the DC connections at terminals 4 [+] and 5 [-] of the back terminal board following the
polarity indicated on the CONNECTION DIAGRAM.
When the Control Units are connected with external battery backups, make sure that the voltage
remains within the values recorded in the TECHNICAL CHARACTERISTICS; the board is
equipped with appropriate indications for power outage at the mains or battery.
For 24 VDC power supplies from external sources [e.g.: battery backup, power supply modules,
etc.] the CV-18 Control Unit jumper needs to be predisposed in pos. 2-3 on terminals 4 and 5 as
represented below.
This input is protected by 2-amp fuse F3.
Attention!
Control Unit 9010/20 LCD is not predisposed for battery backup charging; this function
needs to be implemented by external devices.