Danfoss VLT CDS302 Operating Instructions Manual page 9

Safety Instructions and Gen...
•
ISO 13849-1: 2006 Category 3 PL d
•
ISO 14118: 2000 (EN 1037) – prevention of
unexpected startup
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
•
Qualified and skilled personnel are required for
installation and commissioning of safety
engineering systems
•
The unit must be installed in an IP54 cabinet or
in an equivalent environment. In special
applications a higher IP degree is required
•
The cable between terminal 37 and the external
safety device must be short circuit protected
according to ISO 13849-2 table D.4
•
When external forces influence the motor axis (for
example, suspended loads), additional measures
are required (for example, a safety holding brake)
to eliminate potential hazards
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 in 2.1 Safety and Warnings.
Failure to isolate the mains voltage supply from the unit
and waiting the time specified could result in death or
serious injury.
•
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 trips and stops by
coasting. If unacceptable or dangerous, use
another stopping mode to stop the frequency
converter and machinery, before using this
function. Depending on the application, a
mechanical brake can be required.
•
For synchronous and permanent magnet motor
frequency converters, in a multiple IGBT power
semiconductor failure: In spite of the activation of
the Safe Torque Off function, the 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 system or affected area
of a machine only. It does not provide electrical
MG34M302 - VLT
®
Operating Instructions VLT CDS302 and CDS303
Follow these steps to perform a safe installation of the
frequency converter:
1.
2.
Illustration 2.2 Jumper between Terminal 12/13 (24 V) and 37
®
is a registered Danfoss trademark/Commercial Compressor
safety. Do not use this function 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 2.2.)
Connect an external Safety monitoring relay via a
NO safety function to terminal 37 (safe stop) and
either terminal 12 or 13 (24 V DC). Follow the
instruction for the safety device. The Safety
monitoring relay must comply with Category 3
(EN 954-1)/PL "d" (ISO 13849-1) or SIL 2 (EN
62061).
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