2 Safety
2.1 Safety Symbols
The following symbols are used in this document:
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
The products may only be assembled, installed,
programmed, commissioned, maintained, and decommis-
sioned by persons with proven skills. 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 PDS(SR)s 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, parameterisation,
etc.).
Protective measures
•
Safety engineering systems may only be installed
and commissioned by qualified and skilled
personnel.
•
Install the frequency converter in an IP54 cabinet
as per IEC 60529 or in an equivalent environment.
In special applications, a higher IP degree may be
necessary.
•
Ensure short-circuit protection of the cable
between terminal 37 and the external safety
device according to ISO 13849-2 table D.4.
•
When external forces influence the motor axis
(e.g. suspended loads), additional measures (e.g. a
safety holding brake) are required to eliminate
hazards.
2.3 Safety Precautions
See the
Safety
chapter in the relevant Operating
Instructions for general safety precautions.
CAUTION
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.
WARNING
RISK OF DEATH AND SERIOUS INJURY
If external forces act on the motor e.g. 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 additional measures for
fall protection. For example, mechanical brakes must be
installed additionally.
WARNING
RISK OF DEATH AND SERIOUS INJURY
STO (i.e. 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, e.g. by
switching off mains via an additional contactor.
Safety
Operating Instructions
MG37D202
Danfoss A/S © 09/2014 All rights reserved.
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