Native
EN954-1
Category 3
Safety Compliance
with Unidrive SP & Commander GP20 Secure Disable
As a major
Solutions Platform Unidrive SP has had
to address not only all areas of control
and communication but also safety.
Invariably in modern control systems,
some means has to be provided of
preventing a drive from generating
torque in a motor with a very high
degree of integrity when the drive is in
Standby or Stop mode. In most
conventional systems this requirement is
fulfilled by safety contactors, which
are additional components and therefore
add cost and increase space required in
the cubicle. Unidrive SP overcomes this
problem with its own integrated Secure
Disable (SD) function. SD is suitable
for incorporation into the safety system
of a machine. It is also independent of
the drive firmware; as such it meets the
requirements of
EN954-1 category 3
required for EC Machinery Directive.
Emerson has extended this capability to
the Commander GP20 series of Variable
Frequency Drives.
The Drives' range is dual rated and
can operate in both normal and heavy
duty regions and is available in the
power range from 0.75kW to 150kW. In
addition to its many system features the
range offers the OEM true worldwide
operation with an input voltage range
from 200V to 690Vac, 50/60Hz. In control
terms the drives offer market leading
motor shaft performance and torque loop
update times and ultra quiet and
efficient operation with a switching
frequency up to 16 kHz.
Phil Sewell adds “The new product design
cycle is done typically to gain 2-4
years advance on your rivals, and in so
doing to leapfrog forward. When you
start from the leading pack as we have
with Unidrive, the leap forward is more
pronounced, with the process more akin
to evolution than radical revolution,
and the result is more effective hence
the benchmark.”
“Control Techniques have once again
taken a giant leap forward in design
concept and technology, placing us a
product generation ahead of other Drives
manufacturers”. |
Fail safe
interlock (previously with feedback) to EN 945-1
Cat 3 |
Unidrive
