Danfoss VLT FC 100 Operating Instructions

2.1.5 Avoid Unintended Start
While the frequency converter is connected to mains, the
motor can be started/stopped using digital commands,
bus commands, references or via the Local Control Panel
(LCP):
•
Disconnect the frequency converter from mains
whenever personal safety considerations make it
necessary to avoid unintended start.
•
To avoid unintended start, always activate the
[Off] key before changing parameters.
•
An electronic fault, temporary overload, a fault in
the mains supply, or lost motor connection may
cause a stopped motor to start. The frequency
converter with Safe Stop provides protection
against unintended start, if the Safe Stop
Terminal 37 is deactivated or disconnected.
2.1.6
Safe Stop
The FC 302 can perform the safety function Safe Torque Off
(As defined by draft CD IEC 61800-5-2) or Stop Category 0
(as defined in EN 60204-1).
It is designed and approved suitable for the requirements
of Safety Category 3 in EN 954-1. This functionality is called
Safe Stop. Before integrating and using Safe Stop in an
installation, a thorough risk analysis on the installation
must be carried out in order to determine whether the
Safe Stop functionality and safety category are appropriate
and sufficient. In order to install and use the Safe Stop
function in accordance with the requirements of Safety
Category 3 in EN 954-1, the related information and
instructions of the FC 300 Design Guide MG33BXYY must be
followed. The information and instructions of the
Operating Instructions are not sufficient for a correct and
safe use of the Safe Stop functionality.
2.1.7
Safe Stop Installation
To carry out an installation of a Category 0 Stop
(EN60204) in conformity with Safety Category 3 (EN954-1),
follow these instructions:
1. The bridge (jumper) between Terminal 37 and 24
V DC must be removed. Cutting or breaking the
jumper is not sufficient. Remove it entirely to
avoid short-circuiting. See jumper in
Illustration 2.1.
2. Connect terminal 37 to 24 V DC by a short-circuit
protected cable. The 24 V DC voltage supply
must be interruptible by an EN954-1 Category 3
circuit interrupt device. If the interrupt device and
the frequency converter are placed in the same
installation panel, use an unscreened cable
instead of a screened one.
37
12
130BT314.10
Illustration 2.1 Bridge jumper between terminal 37 and 24 V DC
Illustration 2.2 shows a Stopping Category 0 (EN 60204-1)
with safety Category 3 (EN 954-1). The circuit interrupt is
caused by an opening door contact. The illustration also
shows how to connect a non-safety related hardware
coast.
Safety Instructions and Gen...
VLT
®
Automation Drive FC 300 12-Pulse
Operating Instructions High Power
6 MG34Q202 - VLT
®
is a registered Danfoss trademark
22

Danfoss VLT FC 100 Specifications

General

Brand	Danfoss
Model	VLT FC 100
Category	DC Drives
Language	English