2 Installation – Safety & EMC
7
2 Installation – Safety & EMC
This chapter describes how to install and mount the MOD53, and how to connect
the unit to a power source and auxiliary equipment.
Although today’s electronic components are very reliable, it should be anticipated
in any system design that a component could fail and it is therefore desirable to
make sure a system will fail safe. This could include the provision of an additional
monitoring device, depending upon the particular application and any
consequences of an instrument or sensor failure.
WIRING INSTALLATION
The specified performance of the MOD53 is entirely dependent on correct
installation. For this reason, the installer should thoroughly read the following
instructions before attempting to make any electrical connections to the unit.
CAUTION !
: ALWAYS REMOVE THE MAIN POWER FROM THE SYSTEM
BEFORE
ATTEMPTING ANY ALTERATIONS TO THE WIRING. ENSURE THAT
BOTH
POWER INPUT LINES ARE ISOLATED. MAKE SURE THAT THE POWER
CANNOT BE SWITCHED ON BY ACCIDENT WHILST THE UNIT IS BEING
CONNECTED. FOR SAFETY REASONS AN EARTH CONNECTION MUST BE
MADE TO THE EARTH TERMINAL OF THIS INSTRUMENT.
LOCAL WIRING AND SAFETY REGULATIONS SHOULD BE STRICTLY
ADHERED TO WHEN INSTALLING THIS UNIT. SHOULD THESE
REGULATIONS CONFLICT WITH THE FOLLOWING INSTRUCTIONS,
CONTACT LTH ELECTRONICS OR AN AUTHORISED LOCAL DISTRIBUTOR
FOR ADVICE.
To maintain the specified levels of Electro Magnetic Compatibility (EMC,
susceptibility to and emission of electrical noise, transients and radio frequency
signals) it is essential that the types of cables recommended within these
instructions be used. If the installation instructions are followed carefully and
precisely, the instrument will achieve and maintain the levels of EMC protection
stated in the specification. Any equipment to which this unit is connected must also
have the same or similar EMC control to prevent undue interference to the system.
♦ Terminations at the connectors should have any excess wire cut back so that
a minimal amount of wire is left free to radiate electrical pick-up inside or
close to the instrument housing.
♦ The terminal cover of the surface mount unit must be correctly re-assembled
and securely fastened, to maintain a continuous electro-magnetic shield
around the instrument.
N.B. The use of CE marked equipment to build a system does not necessarily
mean that the completed system will comply with the European requirements for
EMC and therefore CE marking.
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