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© Servomex Group Limited. 2020
07931001B revision 6
7.4 Electrical connections
General safety
Make sure you read and understand the warnings and cautions in this section
before you proceed
Make sure that you install the instrument to conform to all relevant safety
requirements, National Electrical Code and any local regulations. The
installation must be safe for any extremes of operating conditions which
may occur in the operating environment of the Laser 3 Plus.
It is a condition of certification that the unit must be installed following the
appropriate national or international legislation or codes of practice. In
particular, you must make sure that the correct glands are fitted to cable
entries and that you do not compromise the weatherproofing of the
enclosure.
The Laser 3 Plus does not incorporate an integral on/off switch. You must
provide a means of externally isolating the electrical supply from the Laser
Analyzer. Use a suitable switch or circuit breaker located close to the Laser
Analyzer clearly marked as the disconnecting device for the Laser Analyzer.
This must also incorporate a suitable fuse or over-current protection device,
set to or rated at no more than 3 A. To comply with the relevant safety
requirements this power disconnection device must be approved to:
•
UL 489 for equipment used in the USA
•
CSA C22.2 No. 5.1 for equipment used in Canada
•
IEC 60497 for equipment used in the EU and the rest of the world
Equipment connected to the DC power input, mA and Ethernet outputs,
relay terminals and mA input terminals must be separated from AC mains
voltages by at least reinforced insulation or equivalent.
All of the electrical connections to the Laser 3 Plus are considered to be
incendive and must only be connected to safe area equipment.
Only remove enclosure covers (that is gland plates and enclosure doors) if
there is a negligible risk of pollution of the electronic circuits due to
moisture, liquids, dirt, dust or other contamination.
Before you refit the covers, make sure that the sealing gaskets are clean,
dry and undamaged. Replace and secure all covers as soon as possible
after you complete your task within the enclosure.
Disconnect all cables from the Laser 3 Plus when you carry out insulation
testing on them.
Make sure your electrical supply can provide the necessary maximum
power consumption of 25 W.
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