User’s Guide
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DRF-POT FOR
POTENTIOMETER INPUT,
DRF-RES FOR RESISTANCE INPUT
DRF Series Signal Conditioners
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User’s Manual DRF Series
INDEX
GENERALINFORMATION.................................................. 4
QUICKGUIDE .................................................................... 5
POWERSUPPLYCONNECTIONS ................ 5
SIGNALADJUSTMENT .................................. 6 and 7
DIMENSIONSANDCONNECTIONS .............. 8
TECHNICALDATA .............................................................. 9
INPUTSIGNAL ............................................... 9
OUTPUTSIGNAL ........................................... 9
POWER SUPPLY.......................................... 9
MECHANICALDIMENSIONS ......................... 9
GALVANICISOLATIONLEVELS ................... 9
GENERALSPECIFICATIONS ......................... 9
MATERIALS ................................................... 9
CAUTIONS,WARNINGSANDNOTES............................... 10
SAFETYCONSIDERATIONS
PRESCRIPTION.- Before starting any been stored in
a
bad conditions or
a
operation of adjustment, protection failure happened, then do not
r
e
p
l
a
c
e
m
e
n
t
,
attempt to operate, keep the unit out of
service and send for repair.
maintenance or repair, the
unit must be disconnected
from any kind of power supply. Keep the unit
clean, to assure good functioning and per-
formance. To prevent electrical or fire
INCASEOFFIRE
1.-Disconnecttheunitfromthepowersupply
2.- Give the alarm according to the local
hazard, do not expose the unit to excessive rules
moisture. Do not operate the unit in the 3.- Switch off all air conditioning devices
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.
4.- Attack the fire with carbonic snow, do not
use water in any case
WARNING:Inclosedareas
do not use systems with
vaporizedliquids.
If the unit shows signs of damage, is not
able to show the expected measures, has
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Pa ge 3
User’s Manual DRF Series
GENERALINFORMATION
The DRF series of Isolated Signal
Converters, allow to convert process
The isolation offered by the DRF series
signals,temperatures,electricalsignals, of Isolated Signal Converters is a 3 way
etc,tocurrentloopsorvoltagesignalsfor
isolation. Thus, all the benefits exposed
further retransmision, while introducing
above are applicable to any of the three
intothesystemgalvanicisolationbarriers circuits composing the instrument : input,
between the input, the output and the
output and power.
power supply circuits.
Recalibrationoftheinstrumentsisrealized
inafastandeasyway. Openingthefront
cover grants access to the configuration
jumpers. Additional Span and Offset
potentiometers are directly accessible
The DRF series of Isolated Signal
Converters, offer an excellent relation
between signal conversion speed and
measurementaccuracy. Offeringuptoa
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
fromthefrontalpart.Thesepotentiometers
are highly decoupled, minimizing the
iterations needed to obtain a correct
adjustment.
quickly retransmitted in
a
fast and
accurateformtoremotedataacquisition
systems or PLC’s. The isolated signal
converters of the DRF series are ideal to
integrate into 12 bit data acquisition
In order to obtain a higher and quickest
benefit of the DRF units, we recommend
you to read carefully the information
providedinthismanualbeforeproceeding
systems.
totheinstallationoftheinstrument.Inthis
manual you will find all technical data,
Its powerful galvanic isolation of 3500 V
introduceshighsecuritytothemeasuring
both electrical and mechanical, needed
for a correct instalation and utilization.
systems, preventing the propagation of
thosephenomenonwhichusuallycause
damage, such as transient peaks or
energyshocksinanyofthecircuitsofthe
Note : The DRF Series Isolated Signal
Convertershaveacharacteristicslabel
attachedonthesideoftheinstrument.
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
groundloopsorsignalleaks,whichdistort
Check that this information matches
withyourrequirementsforthespecific
application, and especially check the
value and type of the Power Supply.
the acquired data and are extremely
difficulttoisolateonceintroducedintothe
signal.
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Pa ge 4
User’s Manual DRF Series
QUICKGUIDE
The DRF units have a front cover which
can be opened down. This cover gives
access to the Span and Offset
potentiometers, and to the selection
jumpersforinput andoutputsignalranges.
Toopenthefrontcover,pressslightlythe
sidesofthecoverattheupperside,close
totheOUTPUTterminals,asindicatedon
Figure1.
Thecoverisfreetoopendown,asshown
onFigure2.
POWERSUPPLYCONNECTIONS
FIGURE1
FRONT VIEW WITH COVER
DRFunitsarepoweredthroughtheplug-
interminalpositionedontheuppersideof
the instrument. This terminal is placed in
atransverseaxis,differentfromtheother
terminals. Close to the power supply
terminalthereisasmallyellowlabelwith
indicationsontheconnectionsforACand
IMPORTANT !! Check that the power
supply indicated on the white label
attached to the side of the instrument,
matcheswiththepowersupplyyouwant
to connect.
For more accurate information on the
power supply connections, please see
page 6 of this manual.
DC
FIGURE2
SIDE VIEW
POWER S UPPLY TERMINAL
FRONT COVER OPENING:
ACCESS TOJUMPERS FOR
INPUT AND OUTPUT RANGE
SELECTION, AND ACCESS TO
SPAN AND OFFSET ADJUST
POTENTIOMETERS
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Pa ge 5
User’s Manual DRF Series
SIGNALADJUSTMENT
Toproceedtoadjustarangeofinputand
output signals, first select with the
appropriate jumpers, the signal ranges
which include your desired adjustment.
Then proceed to the adjustment.
Selection Jumpers : Output Signal Range
SELECTIONJ UMPERS
OUTPUT SIGNAL
SPANP OTENTIOMETER
OFFSET POTENTIOMETER
0/20mA
0/10Vdc
0/1Vdc
(4/20mA)
SELECTIONJ UMPERS
INPUT SIGNAL
Selection Jumpers : Input Signal Range
(See next page)
FIGURE 3
F RONT VIEW
WITHOUT COVER
getting an output which is the
AdjustmentExampleformodelDRF-POT
difference between the high and low
output levels (10-0=10Vdc).
1.- Connect potentiometer to input
terminals (8 «term+», 9 «term-» and 7 «signal»)
2.- Connect a multimeter to the output
5.- Input low input level (0 %).
Operate offset potentiometer until
signal terminals (4 and 5 for mA or 4 and 6 for
Vdc).
getting the low level output (0Vdc).
(Values in brackets are examples for
calibration 0/100% = 0/10Vdc)
a
6.- Input high input level and check that
that the output also matches the
desired level (100 % =10Vdc).
3.- Input a zero signal (0 %).
Operate offset potentiometer until If more accurate measurement is needed,
repeat steps 5 and 6.
getting a zero output (0Vdc).
Most of the input / output combinations
will be properly adjusted within the
instrument accuracy after these steps.
4.- Input the difference between the high
and low input levels (100-0=100% Aac).
Operate span potentiometer until Close front cover once calibration is
finished.
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Pa ge 6
User’s Manual DRF Series
SELECTION JUMPERS: INPUT SIGNAL RANGE
DRF-POT for POTENTIOMETER SIGNALS
Range : 100% FS
Range : 25% FS
Range : 12.5% FS
Range : 50% FS
DRF-RES for RESISTANCE SIGNALS
Range :
10 KOhms
Range :
3 KOhms
Range Min : 5 KOhms
Range Min : 1.5 KOhms
Range :
1.5 KOhms
Range :
5 KOhms
Range Min : 750 Ohms
Range Min : 3 KOhms
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Pa ge 7
User’s Manual DRF Series
DIMENSIONS AND CONNECTIONS
9mm
(0.35’’)
Output Connections
93mm
(3.66’’)
Input Connections
22,5mm
(0.89’’)
POTENTIOMETER
DC Powered
RESISTANCE
Special Width for
AC Power models
~
~
24 Vdc
0 Vdc
AC Powered
110 mm
(4.33’’)
37mm
(1.46’’)
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Pa ge 8
User’s Manual DRF Series
TECHNICAL DATA : Models DRF-POT and DRF-RES
INPUTSIGNALforPOTENTIOMETER
RANGES
0/100 %
0/50 %
StandardDINrailmounting,asspecified
onDIN46277andDINEN50022
0/25 %
37.5 x 7.5 mm (1.38 x 0.3 ´´)
0/12.5%
(minimum8%)
GALVANICISOLATIONLEVELS
DCUnits
Potentiometer value min 100Ohms
max 1MOhm
Input - Output 3.5 KV (60 seconds)
Power-Input
3.5 KV (60 seconds)
3 Wire System, 1 Vdc Excitation
Power-Output 1 KV(60 seconds)
INPUTSIGNALinRESISTANCE
ACUnits
RANGES
0/10 KOhms
Input - Output 3.5 KV (60 seconds)
0/5 KOhms
Power-Input 3.5 KV (60 seconds)
0/3 KOhms
Power - Output 3.5 KV (60 seconds)
0/1.5 KOhms
(minimum750Ohms)
2 Wire System, 0.2 mA Excitation
All isolation levels are tested during a time
of 60 seconds, with current leaks <1mA
Note : Indicated isolation levels are also
sometimes named as STRENGTHENED
ISOLATION levels, for systems with
OUTPUT SIGNAL in VDC
RANGES
0/10 Vdc
0/1 Vdc
11Vdcapprox.
-1Vdcapprox.
≥1KOhm
Polution Level 2
Max Output
Min Output
Min Load R
GENERALSPECIFICATIONS
Accuracy
<0.2% F.S.
Optimizedfor 12 bit systems
OUTPUT SIGNAL in mA
Linearity
<0.1% F.S.
RANGES
0/20mA(4/20mA)
ThermalDrift
<250ppm/ºCTipical
Max Output
22mAapprox.
Warm-UpTime 5 minutes
ResponseTime <70mS
Min Output
Max Load R
-1.5mAapprox.
≤400Ohms
(90% of signal)
POWERSUPPLY
Plug-InScrewTerminals
DCPower
ACPower
24Vdc±10%
230Vac ±10% 50/60 Hz
115Vac ±10% 50/60 Hz
Maximum Wire Section 2.5 mm2
Protection
IP-30
Temp.Operation from 0 to 60ºC
Temp.Storage from -20 to +70ºC
Consumption <3.8VA
MECHANICALDIMENSIONS
MATERIALS
BoxandCoverinPoliamidePA6UL94
V-2 blue color
Terminals in Poliamide UL94 V-0
DC Units
AC Units
22.5 x 93 x 110 mm
37.0 x 93 x 110 mm
Weight DC
Weight AC
120gr.
200gr.
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Pa ge 9
User’s Manual DRF Series
CAUTIONS,WARNINGSANDNOTES
INSTALATION
PRECAUTIONS.- The installation and the
fields, such as power relays, electrical
future use of this unit
must be done by qualified
engines, speed regulators, etc. Do not
use until installation is completed.
personnel. The unit has
not AC (mains) switch,
POWER SUPPLY.- The power supply must
be connected to the adequate terminals 1,
2 and 3. The characteristics of the power
supply are shown on the side label. Please
make sure that the unit is correctly
connected to a power supply of the correct
neither internal protection fuse. It will be in
operation as soon as power is connected.
The installation must incorporate an
external mains switch with
a
protection
fuse and also the necessary devices to
protect the operator and the process when
voltage and frequency. Do not connect the
unit to lines which are overloaded or which
using the unit to
a
control machine or
process where injury to personnel or
damage to equipment or process may
occur as a result of failure of the unit.
provide power to systems working on ON-
OFF cycles or inductive loads.
ATTENTION : If the power supply is DC
voltage, be careful with the polarity
indicated for each terminal.
RECOMMENDED FUSES
24 Vdc
250mA
230 Vac
70 mA 100 mA
115 Vac
SIGNAL WIRING .- Certain considerations
must be given when installing the signal
input wires. If the wires are long, they can
act as an antenna introducing electrical
noise into the unit. Therefore :
All fuses .-Time Lag Fuse
SAFETY PRESCRIPTIONS.- The unit has
been designed and tested
under EN-61010-1 rules and
is
delivered
in
good
Do not install the signal input wires in the
same conduit with power lines, heaters,
conditions. This User’s Ma-
nual contains useful information the user
has to respect in order to warrant a proper
function of the unit, and good security
solenoids, SCR controls, etc ... and always
far from these elements.
conditions. The unit is designed for
internal applications, with good
ventilation to avoid excessive heating. It
can occasionally be applied to
temperatures down to 10ºC or up to 70ºC
When shielded wires are used, leave
unconnected the shield on the transmitter
side and conect the other end of the shield
to the ground terminal of the machine.
without security degradation. Do all
connections before applying power to the
unit. Do not make wiring changes until
power is disconnected from the unit.
EXCITATION VOLTAGE.- Model DRF-PR
incorporates an internal power supply for
transducers. The output of this power
supply is connected to terminals 7 and 9.
Do not connect these terminals to an
Install the unit far from elements
generating electric noise, or magnetic
external power supply, beacuse both units
will be permantently damaged.
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Pa ge 10
WARRANTY/ DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship
for a period of 13 months from date of purchase. OMEGA’s Warranty adds an additional one (1)
month grace period to the normal one (1) year product warranty to cover handling and shipping
time. This ensures that OMEGA’s customers receive maximum coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon
examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge.
OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, including but not
limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unautho-
rized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered with or
shows evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture or
vibration; improper specification; misapplication; misuse or other operating conditions outside of
OMEGA’s control. Components in which wear is not warranted, include but are not limited to contact
points, fuses, and triacs.
OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for
any damages that result from the use of its products in accordance with information
provided by OMEGA, either verbal or written. OMEGA warrants only that the parts
manufactured by the company will be as specified and free of defects. OMEGA MAKES NO
OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED
OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY
WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth
herein are exclusive, and the total liability of OMEGA with respect to this order, whether
based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall
not exceed the purchase price of the component upon which liability is based. In no event
shall OMEGA be liable for consequential, incidental or special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a
“Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2)
in medical applications or used on humans. Should any Product(s) be used in or with any nuclear
installation or activity, medical application, used on humans, or misused in any way, OMEGA
assumes no responsibility as set forth in our basic WARRANTY/ DISCLAIMER language, and,
additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or
damage whatsoever arising out of the use of the Product(s) in such a manner.
RETURN REQUESTS/ INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN
(AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PRO-
CESSING DELAYS). The assigned AR number should then be marked on the outside of the return
package and on any correspondence. The purchaser is responsible for shipping charges, freight, insur-
ance and proper packaging to prevent breakage in transit.
FOR NON-WARRANTY REPAIRS, consult
OMEGA for current repair charges. Have the
following information available BEFORE con-
tacting OMEGA:
1. Purchase Order number to cover the COST
of the repair,
2. Model and serial number of the product, and
3. Repair instructions and/or specific problems
relative to the product.
FOR WARRANTY RETURNS, please have the
following information available BEFORE contacting
OMEGA:
1. Purchase Order number under which the
product was PURCHASED,
2. Model and serial number of the product under
warranty, and
3. Repair instructions and/or specific problems
relative to the product.
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our
customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2005 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced,
translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the prior written consent of
OMEGA ENGINEERING, INC.
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TEMPERATURE
DATA ACQUISITION
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Probes, Connectors, Panels &
Assemblies
Wire: Thermocouple, RTD & Thermistor
Calibrators & Ice Point References
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Monitors
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Systems
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Compatibles
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HEATERS
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Treatment
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