General
description
Isolated
conditioners
and
transmitters are
essential components
of any
industrial or
professional
laboratory
measurement
environment.
Without these
components
it is not certainly true to say that measurement
is correct
and
the risk of
ground loop
for people and
equipment
is continuous.
By installing
isolation
components
raises
reliability,
measurement accuracy,
professionalism and
overall safety.
The
main role of
conditioners and
transmitters
is to
transmit
analog signals
coming
through the
isolation
barrier
and to be
reliably
interpreted in
its output.
Fields of application
are systems
for data acquisition,
measurement, monitoring
and
process control.
Applying
isolation
component
it
can be prevented
degradation of the
quality of
measurements made
with different backgrounds
interference
effects
such as
noise,
transients,
electrical discharges,
magnetic induction,
and other impediments
and dangers
from industrial
or laboratory
environment.
The modules
meet the
specifications of
UL
/ CSA
and exceed
the requirements of
C37.90.1
IEEE472/ANSI.
Isolated
components
protect people
and
the
equipment
from
high voltages
and
the
various
potential
ground loops.
Conditioners
and transmitters
electrically
separate
the potential
difference
between the
signal source
and
measuring systems.
In this project, Electronic
Design
integrated
several world
patents
which are now free
to apply.
These products
are designed
for
almost
all popular
types of
sensors
and
have the
instrumentation
features.
ED
offers
CA
series
isolated
conditioners
and
two-wire
isolated
transmitters
CB
Series.
The third,
CD
series,
are digital,
programmable
conditioners,
and this
series is
currently in
development.
Conditioners
-
transmitters
use two types of
power supplies,
CS
Series.
The first type has
the power
of
30 W
and supplies 20 to
30
conditioners
depending of the
type and
the second
of 90W
supplies
multiple
conditioners
and
transmitters.
Power supplies
work with
T-BUS
connectors
that are installed
on DIN rail,
and through
which
power
is transferred
from the
conditioner
to
conditioner
without
conventional
wiring.
With this option
CA
Series
is supported,
and CB
Series
transmitter
due to the nature
of two-wire
power
transfer
is not supported
by
T-BUS
connector.
Series
CA
|
Family
of isolated,
analog
conditioners
with
instrumentation
features |
Series
CB
|
Family
of isolated
conditioner-transmitter
with a two wire current loop |
Comparation
of isolated
conditioners
and
transmitters.
CA
Series
conditioners
are manufactured
in many
variations
(over 400
types)
and they are
the most accurate
isolation
components that
ED
currently has
in its
product range.
A number of
models
have
superior
linearity
which is better than
±
0.005%,
accuracy
of ±
0.02%,
a typical
CMR
of 160
dB,
a
filter
attenuation
at 50
Hz
over 80
dB
(10,000
times),
isolation
voltage is
1500 V
continuously,
and the protection of
the
250Vpp
input
is
also
continuous.
There
is a very
wide range of
models and types available for
the customers.
There
are modules
for conditioning
mV,
V,
mA, A
signals,
RMS
/
DC,
with an input
for
RTD,
thermocouples,
potentiometers,
bridges and
frequency
measuring.
Supplying
CA
conditioners
is possible
with the
CS
via
the
"T-BUS"
connectors
that are installed
on DIN
rail.
Information,
directions
and
prices are
on the section:
Isolated conditioners Series
CA
|
|
CB
Series
is a family of
isolated
transmitters
with a number of
different models
and variations
(over 80
models).
The primary function of
the transmitter
is
an analog signal
processing,
isolation,
conversion to
electricity
and its
transport to
the place of measuring,
using two wire
current loop
of
4 to 20
mA.
Transmitters
have a high
technical
specification of
the accuracy
of ±
0.03%,
linearity
is ±
0.01%,
the isolation
of 1500
V,
80 dB
attenuation
at 50 Hz
and the input protection and
protection
to the level
of 250
Vpp.
CB
Series
supports all popular
types of
sensors
and input
size:
mV,
and
mA,V
signals,
RTD,
thermocouples
RMS
/
DC
and potentiometers.
CB
Series
prices
are significantly
lower than the
price
of competing products,
but
the
quality is
an advantage
in
many areas
of comparation.
Information
and
prices are
on the side:
Two-wire isolated transmitters
Series CB. |
|
Power
supply sources
CS
Series
are designed for
supplying
conditioners,
transmitters
and other devices.
In addition to
these basic
purposes
they can be
used in
the
measurement and
control cabinets
or as a
stand-alone devices
which require
regulated power supply.
There are
two models:
48 W
in the box
width
22.5
mm
and 90
W
in a box
width of
45 mm.
Plastic
boxes
are optimized
for mounting on
DIN
rail.
Power supply
to
conditioner
is distributed
by
T-BUS
connector
or standard
wiring.
Power supply uses the
principle of "off-line
flyback"
converter,
operating in
continuous
mode.
The source is
designed
on a platform
of integrated
AC
/
DC
converter that
has built-in
voltage regulation,
soft start,
overcurrent
circuits
and
thermal
protection and
auto-restart.
Technical
details are
on the section:
CS
series
More
technical details
All
ED's
conditioners
and transmitters,
regardless of the
diversity
of the
family
series,
can be
mixed
in the same
application
with each other,
which allows the user
easily
and cost-effective
way of
solving the
specific needs of
the plant.
Common to all
is that these are
compact
and cost-effective
components that
meet
the
professional requirements
for
instrumentation,
laboratory and
industrial
measurements.
Conditioners
and
transmitters
are designed
for mounting on
DIN
rail.
The modules
have connectors
with screws
so that the
mounting
and wiring
are easily
and quickly.
On the special
request of the user
ED
can develop
and
deliver a
version of
the module
with special
isolation
requirements.
The costumer
shall
specify the
input and output
voltage, current,
or frequency,
the required
linearity,
accuracy and
temperature range.
Price
for this development
is moderate
and the cost
of development
will not be
charged
if you
require delivery
of 50
or more modules.
Certification of
these products
is available if
requested.
Quality
and warranty period
The quality
of conditioners
and
transmitters
is high.
If the
specifications
of these products
are compared with
comparable
products of other
manufacturers
it will be noticed
that the
ED's
modules
are
comparable
with the
best manufacturers.
If
you have
any doubt about
this claim,
ask for a
sample for
testing or
bring the
sample you
want to
compare the
quality of our
conditioners.
We
possess
high-quality
instrumentation,
so in the
common
measurements
we can compare
the samples and
their results.
The warranty period
for isolated
conditioners
and
transmitters
is 7
years.
Service
time
is 10
years.
Time between
failure
(Mean
time between
failures or
MTBF)
exceeds 50
years. Our
customers
have an additional
privilege,
ED's
products service
on the same day,
and it is
not the case
with competing products.
ED
designed
automatic
test equipment
for conditioners
and transmitters.
The equipment
consists of
systems for
data acquisition
ED108,
several different
interfaces
and software
written in
the LabVIEW
environment.
Testing
is done
automatically, and
all the vital
features are tested.
Modules
are delivered with
a test
of linearity
(pictured
right).The
documents will be
in English if
requested.
Prices and
delivery times
For small amounts
(up
to 20 pieces)
delivery
time is three to
five days.
Larger amounts
(50 to
100 units)
can be delivered
within 10
to 15
working days.
Small amounts of
a few pieces
are usually
available
immediately.
In determining the
prices of these
components,
the purchasing ability
of our customers is
taken into account.
Isolating
components that
have a 14
bit
linearity and
accuracy,
in the U.S.
cost between
120 and
200$ ,
while in Europe
cost 120 up to 200€.
If we add
the cost
of procurement,
transport and customs
price of a
good quality
conditioner
here,
it will
be
between 130
and 240$
depending on the
type.
When this
is multiplied by
a large number of
conditioners,
sometimes
needed by the user,
the prices may be so
high
that constitute a danger
to the survival of
the project.
ED
has established
that
lower prices
should
reduce
this type of
danger.
ED
products
conditioners
and
transmitters
for 25 years,but
only last ten
years,
after long
experience and
knowledge
(and
with
a few innovations)
we managed to reduce
the price
of these products
and
to increase the
performance
level of quality
which meets
only in
very
expensive
equipment.
The largest number
of isolated
instrumentation
conditioner
CA and
CB
series
costs less
than 80
€
for
one piece
which is
nearly two
times cheaper
than if
you buy them in
America or
in Europe.
Quantity
discount is our
standard way of doing
business and
it provides
the
lowest
prices
of isolating
conditioners
that can be
found in sell.
Importers and
dealers
of this type
of components and
equipment
now
have an
excellent quality,
high accuracy,
lower cost, fast delivery,
service, training,
user documentation,
telephone assistance,
seven-year
warranty
and
other benefits. |