Omega DRF-POT, DRF-RES User Manual

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DRF-POT FOR

POTENTIOMETER INPUT,

DRF-RES FOR RESISTANCE 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 DRF Series

INDEX

GENERAL INFORMATION.................................................. 4

QUICK GUIDE .................................................................... 5

POWER SUPPLY CONNECTIONS ................ 5

SIGNAL ADJUSTMENT .................................. 6 and 7

DIMENSIONS AND CONNECTIONS .............. 8

TECHNICAL DATA.............................................................. 9

CAUTIONS, WARNINGS AND NOTES............................... 10

INPUT SIGNAL............................................... 9

OUTPUT SIGNAL ........................................... 9

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

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

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

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

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

SAFETY CONSIDERATIONS

PRESCRIPTION.- Before starting any

from any kind of power supply. Keep the unit
clean, to 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.

If the unit shows signs of damage, is not
able to show the expected measures, has

operation of adjustment,
replacement,

maintenance or repair, the
unit must be disconnected

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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

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

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

User’s Manual DRF Series

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 up to a

0.2% accuracy and down to 70ms
response time, 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 DRF series are ideal to

integrate into 12 bit data acquisition
systems.

Its powerful galvanic isolation of 3500 V
introduces high security to the measuring
systems, preventing the propagation of

those phenomenon which usually cause
damage, 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 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 Series Isolated Signal
Converters have a characteristics label

attached on the side of the instrument.
Check that this information matches

with your requirements for the specific
application, and especially check the

value and type of the Power Supply.

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