Specifications

2.5 Vibration and Shock
The frequency converter has been tested according to the
procedure based on the shown standards:
•
IEC/EN 60068-2-6: Vibration (sinusoidal) - 1970
•
IEC/EN 60068-2-64: Vibration, broad-band random
The frequency converter complies with requirements that
exist for units mounted on the walls and floors of
production premises, as well as in panels bolted to walls or
floors.
2.6 Safe Torque Off
The FC 102 can perform the safety function Safe Torque Off
(STO, as defined by EN IEC 61800-5-2
1
) and Stop Category 0
(as defined in EN 60204-1
2
).
Before integrating and using Safe Torque Off in an instal-
lation, a thorough risk analysis on the installation must be
carried out in order to determine whether the Safe Torque
Off functionality and safety levels are appropriate and
sufficient. It is designed and approved suitable for the
requirements of :
•
Category 3 in EN ISO 13849-1
•
Performance Level "d" in EN ISO 13849-1:2008
•
SIL 2 Capability in IEC 61508 and EN 61800-5-2
•
SILCL 2 in EN 62061
1) Refer to EN IEC 61800-5-2 for details of Safe torque off
(STO) function.
2) Refer to EN IEC 60204-1 for details of stop category 0
and 1.
Activation and Termination of Safe Torque Off
The Safe Torque Off (STO) function is activated by
removing the voltage at Terminal 37 of the Safe Inverter.
By connecting the Safe Inverter to external safety devices
providing a safe delay, an installation for a Safe Torque Off
Category 1 can be obtained. The Safe Torque Off function
of FC 102 can be used for asynchronous, synchronous
motors and permanent magnet motors. See examples in
chapter 2.6.1 Terminal 37 Safe Torque Off Function.
WARNING
After installation of Safe Torque Off (STO), a commis-
sioning test as specified in section Safe Torque Off
Commissioning Test must be performed. A passed
commissioning test is mandatory after first installation
and after each change to the safety installation.
Safe Torque Off Technical Data
The following values are associated to the different types
of safety levels:
Reaction time for T37
-
Maximum reaction time: 20 ms
Reaction time = delay between de-energizing the STO
input and switching off the output bridge.
Data for EN ISO 13849-1
•
Performance Level "d"
•
MTTF
d
(Mean Time To Dangerous Failure): 14000
years
•
DC (Diagnstic Coverage): 90%
•
Category 3
•
Lifetime 20 years
Data for EN IEC 62061, EN IEC 61508, EN IEC 61800-5-2
•
SIL 2 Capability, SILCL 2
•
PFH (Probability of Dangerous failure per Hour) =
1E-10/h
•
SFF (Safe Failure Fraction) > 99%
•
HFT (Hardware Fault Tolerance) = 0 (1001
architecture)
•
Lifetime 20 years
Data for EN IEC 61508 low demand
•
PFDavg for 1 year proof test: 1E-10
•
PFDavg for 3 year proof test: 1E-10
•
PFDavg for 5 year proof test: 1E-10
No maintenance of the STO functionality is needed.
Take security measures, e.g. only skilled personnel must be
able to access and install in closed cabinets.
SISTEMA Data
From Danfoss, functional safety data is available via a data
library for use with the SISTEMA calculation tool from the
IFA (Institute for Occupational Safety and Health of the
German Social Accident Insurance), and data for manual
calculation. The library is permanently completed and
extended.
Introduction to VLT® HVAC D... Design Guide
14 Danfoss A/S © Rev. 06/2014 All rights reserved. MG11BC02
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