Safety
2 Safety
2
2
2.1 Safety Symbols
The following symbols are used in this guide:
WARNING
Indicates a potentially hazardous situation that could
result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation that could
result in minor or moderate injury. It can also be used to
alert against unsafe practices.
NOTICE
Indicates important information, including situations that
can result in damage to equipment or property.
2.2 Qualified Personnel
Only persons with proven skills are allowed to assemble,
install, program, commission, maintain, and decommission
the products. Persons with proven skills
•
Are qualified electrical engineers, or persons who
have received training from qualified electrical
engineers and are suitably experienced to
operate devices, systems, plant, and machinery in
accordance with the general standards and
guidelines for safety technology.
•
Are familiar with the basic regulations concerning
health and safety/accident prevention.
•
Have read and understood the safety guidelines
given in this manual and also the instructions
given in the operating instructions of the
frequency converter.
•
Have a good knowledge of the generic and
specialist standards applicable to the specific
application.
Users of power drive systems (safety related) (PDS(SR)) are
responsible for:
•
Hazard and risk analysis of the application.
•
Identifying safety functions required and
allocating SIL or PLr to each of the functions.
•
Other subsystems and the validity of signals and
commands from them.
•
Designing appropriate safety-related control
systems (hardware, software, parameterization,
and so on).
4
Safe Torque Off
Protective measures
•
•
•
2.3 Safety Precautions
See the Safety chapter in the relevant operating
instructions/guides for general safety precautions.
After installation of STO, perform a commissioning test
as specified in chapter 4.5 STO Commissioning Test. A
passed commissioning test is mandatory after first instal-
lation and after each change to the safety installation.
RISK OF DEATH AND SERIOUS INJURY
If external forces act on the motor, for example in case
of vertical axis (suspended loads), and an unwanted
movement, for example caused by gravity, could cause a
hazard, the motor must be equipped with extra
measures for fall protection. For example, install extra
mechanical brakes.
RISK OF DEATH AND SERIOUS INJURY
STO (that is, removal of 24 V DC voltage supply to
terminal 37) does not provide electrical safety. The STO
function itself is not sufficient to implement the
Emergency-Off function as defined by EN 60204-1.
Emergency-Off requires measures of electrical isolation,
for example by switching off mains via an additional
contactor.
Danfoss A/S © 01/2018 All rights reserved.
Only qualified and skilled personnel is allowed to
install and commission safety engineering
systems.
Install the frequency converter in an IP54 cabinet
as per IEC 60529 or in an equivalent environment.
In special applications, a higher IP protection
rating may be necessary.
Ensure short-circuit protection of the cable
between the safety option and the external safety
device according to ISO 13849-2 table D.4. When
external forces influence the motor axis (for
example suspended loads), extra measures (for
example a safety holding brake) are required to
eliminate hazards.
CAUTION
WARNING
WARNING
MG37D502
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