Emotron AB 01-3694-01r2 EMC and Machine Directive 51
8. EMC and Machine Directive
8.1 EMC standards
The variable speed drive complies with the following stand-
ards:
EN(IEC)61800-3:2004 Adjustable speed electronic power
drive systems, part 3, EMC product standards:
Standard: category C3, for systems of rated supply volt-
age< 1000 VAC, intended for use in the second environ-
ment.
Optional: Category C2, for systems of rated supply volt-
age <1.000 V, which is neither a plug in device nor a mova-
ble device and, when used in the first environment, is
intended to be installed and commissioned only by experi-
enced person with the necessary skills in installing and/or
commissioning VSD’s including their EMC aspects.
8.2 Stop categories and
emergency stop
The following information is important if emergency cir-
cuits are used or needed in the installation where a variable
speed drive is used. EN 60204-1 defines 3 stop categories:
Category 0: Uncontrolled STOP:
Stopping by switching off the supply voltage. A mechanical
stop must be activated. This STOP may not be imple-
mented with the help of a variable speed drive or its input/
output signals.
Category 1: Controlled STOP:
Stopping until the motor has come to rest, after which the
mains supply is switched off. This STOP may not be imple-
mented with the help of a variable speed drive or its input/
output signals.
Category 2: Controlled STOP:
Stopping while the supply voltage is still present. This
STOP can be implemented with each of the variable speed
drive´s STOP command.
WARNING: EN 60204-1 specifies that every
machine must be provided with a category 0
stop. If the application prevents this from
being implemented, this must be explicitly
stated. Furthermore, every machine must be provided
with an Emergency Stop function. This emergency stop
must ensure that the voltage at the machine contacts,
which could be dangerous, is removed as quickly as
possible, without resulting in any other danger. In such
an Emergency Stop situation, a category 0 or 1 stop may
be used. The choice will be decided on the basis of the
possible risks to the machine.
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