Motor Power Company DUET_FL 48/10, User Manual

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The standard EN 60204-1 describes possible actions for emergency situations and defines the terms
EMERGENCY OFF and EMERGENCY STOP (see Table 11)
Table 40: EMERGENCY OFF and EMERGENCY STOP according to EN 60204-1
Action Definition (EN 60204-1) Emergency situation
EMERGENCY
OFF This intervention is used to achieve electrical
safety in an emergency situation by
disconnecting the electrical power to a complete
system or installation or part of it. An EMERGENCY OFF has to be used if there is a risk of
electric shock or another risk caused by electricity.
EMERGENCY
STOP This intervention is used to achieve functional
safety in an emergency situation by stopping a
machine or moving parts. An EMERGENCY STOP is used to stop a process or a
movement which has become hazardous.
As a consequence, an EMERGENCY OFF device requires the disconnection of the power supply
through at least one power contactor, whereas an EMERGENCY STOP can be performed without
disconnecting the power supply.
For stopping the drives, EN 60204-1 describes three stop categories that can be used depending on a
risk analysis. (see Table 12). The next section includes a connection suggestion that allows to realize
the stop categories 0 and 1.
Stop category 2 is not suitable for an EMERGENCY OFF or an EMERGENCY STOP. Stop category 2
is often realized by the control by setting the setpoint to zero. In order comply with the requirements of
stricter safety categories, additional external monitoring devices have to be used!
Table 41: Stop categories
Stop category 0 Uncontrolled stop. Stopping by immediate
disconnection from power. EMERGENCY OFF or EMERGENCY STOP
Stop category 1 Controlled stop. Power is disconnected when the
machine has come to a standstill. EMERGENCY STOP
Stop category 2 Controlled stop. Power is not disconnected when
the machine is at a standstill. Not suitable for EMERGENCY OFF or
EMERGENCY STOP
User Manual DUET_FL „DUET_FL 48/10“ Version 1.1 Motor Power Company