Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual page 13

Introduction
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 Table 1.1. 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
safety. Do not use this function as a control for
starting and/or stopping the frequency converter.
Follow these steps to perform a safe installation of the
frequency converter:
1. 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 1.4.)
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 /PL "d" (ISO 13849-1) or SIL 2 (EN 62061).
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.ctiautomation.net - Email: info@ctiautomation.net
®
VLT AQUA Drive
Operating Instructions
Illustration 1.4 Jumper between Terminal 12/13 (24 V) and 37
Illustration 1.5 Installation to Achieve a Stopping Category 0 (EN
60204-1) with Cat. 3 /PL "d" (ISO 13849-1) or SIL 2 (EN 62061).
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2
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4
5
Table 1.5 Legend to Illustration 1.5
Safe Stop Commissioning Test
After installation and before first operation, perform a
commissioning test of the installation using safe stop.
Moreover, perform the test after each modification of the
installation.
®
MG20M902 - VLT is a registered Danfoss trademark
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12
37
5
Frequency converter
[Reset] key
Safety relay (cat. 3, PL d or SIL2
Emergency stop button
Short-circuit protected cable (if not inside installation IP54
cabinet)
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