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Safety
WARNING
UNINTENDED START
When the frequency converter is connected to AC mains,
DC power supply, or load sharing, the motor may start at
any time. Unintended start during programming, service
or repair work can result in death, serious injury, or
property damage. The motor can start by means of an
external switch, a serial bus command, an input
reference signal from the LCP or LOP, via remote
operation using MCT 10 Set-up Software, or after a
cleared error condition.
To prevent unintended motor start:
•
Disconnect the frequency converter from mains.
•
Press OFF on the LCP, before programming
parameters.
•
The frequency converter, motor, and any driven
equipment must be fully wired and assembled
when the frequency converter is connected to
AC mains, DC power supply, or load sharing.
WARNING
DISCHARGE TIME
The frequency converter contains DC-link capacitors,
which can remain charged even when the frequency
converter is not powered. Failure to wait the specified
time after power has been removed before performing
service or repair work, can result in death or serious
injury.
•
Stop motor.
•
Disconnect AC mains and remote DC-link power
supplies, including battery back-ups, UPS, and
DC-link connections to other frequency
converters.
•
Disconnect or lock PM motor.
•
Wait for the capacitors to discharge fully, before
performing any service or repair work. The
duration of waiting time is specified in the
relevant frequency converter operating
instructions, Chapter 2 Safety.
WARNING
UNINTENDED MOVEMENT
When external forces act on the motor, an unwanted
movement, for example caused by gravity, can cause a
hazard. Failure to take additional measures for fall
protection can result in death or serious injury.
•
Equip the motor with fall protection, for
example additional mechanical brakes.
MG37F102
Operating Instructions
WARNING
EMERGENCY OFF
The STO function does not provide electrical safety, and
is not sufficient to implement the Emergency-Off
function as defined by EN 60204-1. Failure to implement
the Emergency-Off function properly can result in death
or serious injury.
•
CAUTION
The operator or electrical installer is responsible for
proper grounding and compliance with all applicable
national and local safety regulations.
2.4 Risk Assessment
CAUTION
The Safety Option MCB 152 is intended to be part of the
safety-related control system of a machine. Before instal-
lation, perform a risk assessment to determine whether
the specifications of this safety option are suitable for all
foreseeable operational and environmental character-
istics for the system in which it must be installed.
The user of the control system is responsible for the
following:
•
•
•
•
•
•
•
Danfoss A/S © 10/2014 All rights reserved.
Ensure safe isolation of electricity, for example
by installing an emergency stop contactor to
disconnect mains.
The set-up, safety rating and validation of any
sensors or actuators connected to the system.
Completing a system-level risk assessment and
reassessing the system any time a change is
made.
Ensuring (as needed for the application) that the
system fulfils a desired safety rating.
Programming the application software and the
safety option configurations in accordance with
the information in this manual.
Access to the control system.
Access to Safety Option MCB 152 customisation
(configuration changes).
Analysing all configuration settings and selecting
the proper setting to achieve the required safety
rating.
2
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