GE AF-650 GP Series, Руководство по проектированию и установке

Страница: 88 / 166

1 Safety relay
2 Emergency stop button
3 Reset button
Table 6.26
Figure 6.34 Paralleling of Multiple Drives Example
1 Safety relay
2 Emergency stop button
3 Reset button
4 24 V DC
Table 6.27
WARNING
Safe stop activation (i.e. removal of 24 V DC voltage supply
to terminal 37) does not provide electrical safety. The Safe
Stop function itself is therefore not sufficient to implement
the Emergency-Off function as defined by EN 60204-1.
Emergency-Off requires measures of electrical isolation, e.g.
by switching off line power via an additional contactor.
1. Activate the Safe Stop function by removing the
24 V DC voltage supply to the terminal 37.
2. After activation of Safe Stop (e.g. after the
response time), the adjustable frequency drive
coasts (stops creating a rotational field in the
motor). The response time is typically shorter
than 10ms for the complete performance range
of AF-650 GP.
The adjustable frequency drive is guaranteed not to restart
creation of a rotational field by an internal fault (in
accordance with Cat. 3 of EN 954-1, PL d acc. EN ISO
13849-1 and SIL 2 acc. EN 62061). After activation of Safe
Stop, the AF-650 GP display will show the text Safe Stop
activated. The associated help text says "Safe Stop has
been activated. This means that the Safe Stop has been
activated, or that normal operation has not been resumed
yet after Safe Stop activation.
NOTE!
The requirements of Cat. 3 (EN 954-1)/PL “d” (ISO 13849-1)
are only fulfilled while 24 V DC supply to terminal 37 is
kept removed or low by a safety device which itself fulfills
Cat. 3 (EN 954-1)/PL “d” (ISO 13849-1). If external forces act
on the motor, e.g. in case of vertical axis (suspended loads)
- and an unwanted movement, for example caused by
gravity, could cause a hazard, the motor must not be
operated without additional measures for fall protection.
For example, mechanical brakes must be installed
additionally.
In order to resume operation after Safe Stop is activated,
24 V DC voltage must first be reapplied to terminal 37
(text Safe Stop activated is still displayed); second, a reset
signal must be created (via bus, digital I/O, or [Reset] key
on the inverter).
By default, the safe stop function is set to unintended
restart prevention behavior. This means, in order to
terminate Safe Stop and resume normal operation, first the
24 V DC must be reapplied to Terminal 37. Subsequently, a
reset signal must be given (via Bus, Digital I/O or [Reset]
key).
The Safe Stop function can be set to automatic restart
behavior by setting the value of
E-07 Terminal 37 Safe Stop
from default value [1] to value [3].
Automatic Restart means that Safe Stop is terminated, and
normal operation is resumed, as soon as the 24 V DC are
applied to Terminal 37, no reset signal is required.
WARNING
Automatic restart behavior is only allowed in one of the
two following situations:
1. Unintended restart prevention is implemented by
other parts of the safe stop installation.
2. A presence in the hazard zone can be physically
excluded when safe stop is not activated. In
particular, paragraph 5.3.2.5 of ISO 12100-2 2003
must be observed
6.10.1.2 Safe Stop Commissioning Test
After installation and before first operation, perform a
commissioning test of an installation or application making
use of AF-650 GP Safe Stop.
Moreover, perform the test after each modification of the
installation or application, of which the AF-650 GP Safe
Stop is a part.
Application Setup Examples AF-650 GP
TM
Design and Installation Guide
DET-767A 6-33
6 6