Emerson Commander SX Advanced User's Manual page 3

CONTROL TECHNIQUES
Safety Information
Warnings, Cautions and Notes
• A Warning contains information which is
essential for avoiding a safety hazard.
Caution :
A Caution contains information which is necessary for
avoiding a risk of damage to the product or other
equipment.
Note : A Note contains information which helps to ensure
correct operation of the product.
Electrical safety - general warning
The voltages used in the drive can cause severe electrical
shock and/or burns, and could be lethal. Extreme care is
necessary at all times when working with or adjacent to the
drive.
Specific warnings are given at the relevant places in this User
Guide.
System design and safety of personnel
The drive is intended as a component for professional
incorporation into complete equipment or a system. If
installed incorrectly, the drive may present a safety hazard.
The drive uses high voltages and currents, carries a high level
of stored electrical energy, and is used to control equipment
which can cause injury.
Close attention is required to the electrical installation and the
system design to avoid hazards either in normal operation or
in the event of equipment malfunction. System design,
installation, commissioning and maintenance must be carried
out by personnel who have the necessary training and
experience. They must read this safety information and this
User Guide carefully.
The STOP and SECURE INPUT (Option) functions of the
drive do not isolate dangerous voltages from the output of the
drive or from any external option unit. The supply must be
disconnected by an approved electrical isolation device
before gaining access to the electrical connections.
With the sole exception of the SECURE INPUT (Option)
function, none of the drive functions must be used to
ensure safety of personnel, i.e. they must not be used for
safety-related functions.
Careful consideration must be given to the functions of the
drive which might result in a hazard, either through their
intended behaviour or through incorrect operation due to a
fault. In any application where a malfunction of the drive or its
control system could lead to or allow damage, loss or injury,
a risk analysis must be carried out, and where necessary,
further measures taken to reduce the risk - for example, an
over-speed protection device in case of failure of the speed
control, or a fail-safe mechanical brake in case of loss of
motor braking.
The SECURE INPUT (Option) function has been approved
as meeting the requirements of EN954-1 category 3 for the
prevention of unexpected starting of the drive. It may be used
in a safety-related application. The system designer is
responsible for ensuring that the complete system is
safe and designed correctly according to the relevant
safety standards.
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Independent approval by CETIM has been given for sizes 1 to 3.
ADVANCED USER GUIDE
Commander SX
IP66/Nema 4X variable speed drive
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Environmental limits
Instructions in this User Guide regarding transport, storage,
installation and use of the drive must be complied with,
including the specified environmental limits. Drives must not
be subjected to excessive physical force.
Compliance with regulations
The installer is responsible for complying with all relevant
regulations, such as national wiring regulations, accident
prevention regulations and electromagnetic compatibility
(EMC) regulations. Particular attention must be given to the
cross-sectional areas of conductors, the selection of fuses or
other protection, and protective earth (ground) connections.
This User Guide contains
compliance with specific EMC standards.
Within the European Union, all machinery in which this
product is used must comply with the following directives:
98/37/EC: Safety of machinery.
89/336/EEC: Electromagnetic Compatibility.
Motor
Ensure the motor is installed in accordance with the
manufacturer's recommendations. Ensure the motor shaft is
not exposed.
Standard squirrel cage induction motors are designed for
single speed operation. If it is intended to use the capability of
the drive to run a motor at speeds above its designed
maximum, it is strongly recommended that the manufacturer
is consulted first.
Low speeds may cause the motor to overheat because the
cooling fan becomes less effective. The motor should be fitted
with a protection thermistor. If necessary, an electric forced
vent fan should be used.
The values of the motor parameters set in the drive affect the
protection of the motor. The default values in the drive should
not be relied upon.
It is essential that the correct value is entered in parameter 06
motor rated current. This affects the thermal protection of the
motor.
Adjusting parameters
Some parameters have a profound effect on the operation of
the drive. They must not be altered without careful
consideration of the impact on the controlled system.
Measures must be taken to prevent unwanted changes due
to error or tampering.
3854 en - 03.2008 / b
instruction for achieving
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