Danfoss VLT AutomationDrive FC 300 Design Manual page 56

Introduction
automatic restart is used – the requirements according to
ISO 12100-2 paragraph 5.3.2.5 must be fulfilled.
Liability Conditions
It is the responsibility of the user to ensure personnel
3 3 installing and operating the Safe Stop function:
•
Read and understand the safety regulations
concerning health and safety/accident prevention
•
Understand the generic and safety guidelines
given in this description and the extended
description in the Design Guide
•
Have a good knowledge of the generic and safety
standards applicable to the specific application
Standards
Use of safe stop on terminal 37 requires that the user
satisfies all provisions for safety including relevant laws,
regulations and guidelines. The optional safe stop function
complies with the following standards.
IEC 60204-1: 2005 category 0 – uncontrolled stop
IEC 61508: 1998 SIL2
IEC 61800-5-2: 2007 – safe torque off (STO)
function
IEC 62061: 2005 SIL CL2
ISO 13849-1: 2006 Category 3 PL d
ISO 14118: 2000 (EN 1037) – prevention of
unexpected start-up
The information and instructions of the instruction manual
are not sufficient for a proper and safe use of the safe stop
functionality. The related information and instructions of
the relevant Design Guide must be followed.
Protective Measures
•
Safety engineering systems may only be installed
and commissioned by qualified and skilled
personnel
•
The unit must be installed in an IP54 cabinet or
in an equivalent environment. In special
applications a higher IP degree may be necessary
•
The cable between terminal 37 and the external
safety device must be short circuit protected
according to ISO 13849-2 table D.4
•
If any external forces influence the motor axis
(e.g. suspended loads), additional measures (e.g.,
a safety holding brake) are required in order to
eliminate hazards
54
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VLT AutomationDrive FC 300 Design Guide, 0.25-75 kW
Safe Stop Installation and Set-Up
WARNING
SAFE STOP FUNCTION!
The safe stop function does NOT isolate mains voltage to
the frequency converter or auxiliary circuits. Perform work
on electrical parts of the frequency converter or the motor
only after isolating the mains voltage supply and waiting
the length of time specified under Safety in this manual.
Failure to isolate the mains voltage supply from the unit
and waiting the time specified could result in death or
serious injury.
•
•
•
Meet the following requirements to perform a safe instal-
lation of the frequency converter:
1.
2.
®
MG33BE02 - VLT is a registered Danfoss trademark
It is not recommended to stop the frequency
converter by using the Safe Torque Off function.
If a running frequency converter is stopped by
using the function, the unit will trip and stop by
coasting. If this is not acceptable, e.g. causes
danger, the frequency converter and machinery
must be stopped using the appropriate stopping
mode before using this function. Depending on
the application a mechanical brake may be
required.
Concerning synchronous and permanent magnet
motor frequency converters in case of a multiple
IGBT power semiconductor failure: In spite of the
activation of the Safe torque off function, the
frequency converter system can produce an
alignment torque which maximally rotates the
motor shaft by 180/p degrees. p denotes the pole
pair number.
This function is suitable for performing
mechanical work on the frequency converter
system or affected area of a machine only. It does
not provide electrical safety. This function should
not be used as a control for starting and/or
stopping the frequency converter.
Remove the jumper wire between control
terminals 37 and 12 or 13. Cutting or breaking
the jumper is not sufficient to avoid short-
circuiting. (See jumper on Illustration 3.40.)
Connect an external Safety monitoring relay via a
NO safety function (the instruction for the safety
device must be followed) to terminal 37 (safe
stop) and either terminal 12 or 13 (24 V DC). The
Safety monitoring relay must comply with
Category 3/PL "d" (ISO 13849-1) or SIL 2 (EN
62061).