activated, the frequency converter issues an alarm, trips
the
unit,
and
coasts
the motor to a stop. Manual restart is
required. The safe stop function can be used for stopping
the frequency converter in emergency stop situations. In
the normal operating mode when safe stop is not
required, use the regular stop function of the frequency
converter instead. When 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
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 FCD 302 Design Guide,
MG04HXYY
•
Have a good knowledge of the generic and safety
standards applicable to the specific application
User is defined as: integrator, operator, servicing,
maintenance staff.
Protective Measures
•
Safety engineering systems may only be installed
and commissioned by qualified and skilled
personnel
•
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
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.
•
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 stop by
coasting. If coasting is not acceptable, for
example, if it causes danger, then the frequency
converter, and machinery must be stopped using
the appropriate stopping mode before using this
function. Depending on the application, a
mechanical brake is required.
•
Concerning 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
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. Do not use this
function as a control for starting and/or stopping
the frequency converter.
Meet the following requirements to perform a safe instal-
lation 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 in Illustration 2.21.)
2. Connect an external Safety monitoring relay to
terminal 37 (safe stop) and either terminal 12 or
13 (24 V DC). The Safety monitoring relay must
comply with Category 3 (EN 954-1) / PL “d” (ISO
13849-1). The instructions of the manufacturer
must be followed.
Installation
VLT
®
Decentral Drive FCD 302 Operating Instructions
26 MG04F302 - VLT
®
is a registered Danfoss trademark
22
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
To Next Page
Loading...
Need help?
General
