Safety Option Module Mcb 15X - Danfoss VLT AutomationDrive FC 300 Design Manual

Options and Accessories
The filter reduces the ramp-up time of the voltage, the
peak load voltage U
motor, which means that current and voltage become
almost sinusoidal. Consequently, the acoustic motor noise
is reduced to a minimum.
The ripple current in the Sine-wave Filter coils, will also
cause some noise. Solve the problem by integrating the
filter in a cabinet or similar.

9.15 Safety Option Module MCB 15x

NOTE
For more information on MCB 15x see the MCB 15x Safety
Option Operating Instructions.
9 9
G
Illustration 9.39 Safe Drive System
The MCB 15x performs safety functions in accordance with
EN IEC 61800-5-2. It monitors safe motion sequences on
frequency converters, which are safely brought to a stop
and shut down in the event of an error.
The MCB 15x is built into a VLT
and requires a signal from a sensor unit. A safe drive
system from Danfoss consists of the following
•
Frequency converter, VLT
302
•
MCB 15x built into the frequency converter
The MCB 15x
•
activates safety functions
•
monitors safe motion sequences
178
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and the ripple current ΔI to the
PEAK
PLC
Control Card
Field bus Internal Bus 1
Interface
C
MCB 150/151
Safety Option
Internal Bus 2
37
STO
®
AutomationDrive FC 302
®
AutomationDrive FC
MG33BE02 - VLT
®
VLT AutomationDrive FC 300 Design Guide, 0.25-75 kW
•
•
There are 2 variants of the MCB 15x, one with HTL encoder
interface (MCB 151) and one with TTL encoder interface
(MCB 150).
The MCB 15x Safe Option is constructed as a standard
option for the VLT
automatically detected after mounting.
The MCB 15x can be used to monitor the stopping,
starting or speed of a rotating or laterally moving device.
As speed monitor, the option is often used in combination
with hard guarding, access doors, and safety gates with
solenoid-lock or -unlock safety switches. When the speed
of the monitored device drops below the set switch point
(where its speed is no longer considered dangerous), the
MCB 15x sets S37 output low. This allows the operator to
open the safety gate. In speed monitor applications, the
safety output S37 is high for operation (when the motor
speed of the monitored device is below the set switch
point). When the speed exceeds the set value, indicating a
too-high (dangerous) speed, the safety output is low.
The frequency converter
•
•
IGBT
The safety control system
•
M
E
•
•
•
•
®
is a registered Danfoss trademark
signals the status of safety functions to the safety
control system via possible connected Profibus
fieldbus
activates the selected failure reaction Safe Torque
Off or Safe Stop 1, in the event of an error
®
AutomationDrive FC 302 and is
removes the power to the motor,
switches the motor to torque-free, if Safe Torque
Off is activated
activates the safety functions via inputs on the
MCB 15x
evaluates signals from safety devices, such as
•
E-STOP push buttons
•
Non Contact Magnetic switch
•
Interlocking switch
•
Light curtain devices
processes the MCB 15x status function
provides safe connection between MCB 15x and
safety control system
provides fault detection at activation of safety
functions (shorts across contacts, short circuit) on
signal between the safety control system and
MCB 15x