Omega Products DRF-LC Installation Manual

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DRF-LC

FOR LOAD CELL INPUT

DRF Series Signal Conditioners

User’s Guide

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It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI regulations that apply.
OMEGA is constantly pursuing certification of its products to the European New Approach Directives. OMEGA will add
the CE mark to every appropriate device upon certification.
The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it
contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.

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User’s Manual Series DRF

0-INDEX___________________________________________________

1-GENERAL INFORMATION.................................. 4

2-INSTALLATION ................................................... 5

3-DIMENSIONS AND CONNECTIONS................... 6

4-SIGNAL INPUT JUMPERS and PREOFFSET ..... 7

5-SIGNAL OUTPUT JUMPERS .............................. 8

6-READJUSTING INPUT/OUTPUT ......................... 8

7-TECHNICAL DATA-I ............................................ 9

INPUT SIGNAL for mVdc ........................... 9

OUTPUT SIGNAL in Vdc ........................... 9

OUTPUT SIGNAL in mA ............................ 9

IMPEDANCES AND OVERVOLTAGES .... 9

POWER SUPPLY ..................................... 9

MECHANICAL DIMENSIONS .................... 9

GALVANIC ISOLATION ............................. 9

GENERAL SPECIFICATIONS ................... 9

MATERIALS .............................................. 9

8-CAUTIONS, WARNINGS AND NOTES ............... 10

SAFETY CONSIDERATIONS

PRESCRIPTION.- Before starting any

operation for replacement, maintenance or

assure good functioning and performance.
To prevent electrical or fire hazard, do not
expose the unit to excessive moisture. Do not
operate the unit in the presence of flammable
gases or fumes, such an environment
definetely constitutes a safety hazard. The
unit is designed to be mounted on a metal
panel.

repair, the unit must be
disconnected from any kind
of power supply.
Keep the unit clean, to

If the unit shows signs of damage, is not able
to show the expected measures, has been
stored in a bad conditions or a protection
failure happened, then do not attempt to
operate, keep the unit out of service and send
for repair.

IN CASE OF FIRE

1.- Disconnect the unit from the power supply

2.- Give the alarm according to the local rules

3.- Switch off all air conditioning devices

WARNING: In closed areas do not use
systems with vaporized liquids.

4.- Attack the fire with carbonic
snow, do not use water in any
case

Page 3

User’s Manual Series DRF

1-GENERAL INFORMATION___________________________________

The DRF series of Isolated Signal Converters,
allow to convert process signals,
temperatures, electrical signals, etc, to current
loops or voltage signals for further
retransmision, while introducing into the
system galvanic isolation barriers between
the input, the output and the power supply
circuits.

The DRF series of Isolated Signal Converters,
offer an excellent relation between signal
conversion speed and measurement
accuracy. Offering a 0.2% accuracy and up
to a 70ms response time depending on the
model, these units can process information
coming from probes or transducers, in such
a way that can be quickly retransmitted in a
fast and accurate form to remote data
acquisition systems or PLC’s. The isolated
signal converters of the ISC series are ideal
to integrate into 12 bit data acquisition
systems.

Its powerful galvanic isolation of 3.500 V
introduces high security to the measuring
systems, preventing the propagation of those
phenomenon which usually cause damage
to the remote system, such as transient
peaks or energy shocks in any of the circuits
of the system. The galvanic isolation also
acts as a strong CE barrier. The decoupling
created between the input, output and power
circuits avoids pernicious effects on the
output, such as ground loops or signal leaks,
which distort the acquired data and are
extremely difficult to isolate once introduced
into the signal.

The isolation offered by the DRF series of
Isolated Signal Converters is a 3 way
isolation. Thus, all the benefits exposed
above are applicable to any of the three
circuits composing the instrument : input,
output and power.

Recalibration of the instruments is realized
in a fast and easy way. Opening the front
cover grants access to the configuration
jumpers. Additional Span and Offset
potentiometers are directly accessible from
the frontal part. These potentiometers are
highly decoupled, minimizing the iterations
needed to obtain a correct adjustment.

In order to obtain a higher and quickest
benefit of the DRF units, we recommend you
to read carefully the information provided in
this manual before proceeding to the
installation of the instrument. In this manual
you will find all technical data, both electrical
and mechanical, needed for a correct
instalation and utilization.

Note : The DRF Isolated Signal Converter

instruments have a characteristics label

attached on the side of the instrument. Check

that the information indicated on the label

matches with your application requirements,

and specially check that the value and type of

the power supply needed matches the value

and type of the power supply availble on your

installation.

Page 4