Omega Products DRF-FR Installation Manual

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DRF-FR

FOR FREQUENCY INPUT

DRF Series Signal Conditioners

User’s Guide

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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

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

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

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

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

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

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

Page 3

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.

Page 4

User’s Manual DRF Series

QUICK GUIDE

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

jumpers for input and output signal ranges.

To open the front cover, press slightly the
sides of the cover at the upper side, close

to the OUTPUT terminals, as indicated on
Figure1.

The cover is free to open down, as shown
on Figure2.

POWER SUPPLY CONNECTIONS

DRF units are powered through the plug­in terminal positioned on the upper side of

the instrument. This terminal is placed in
a transverse axis, different from the other
terminals. Close to the power supply

terminal there is a small yellow label with
indications on the connections for AC and

DC

FIGURE 2

IDE VIEW

S

FIGURE1

F

RONT VIEW WITH COVER

IMPORTANT !! Check that the power
supply indicated on the white label

attached to the side of the instrument,
matches with the power supply you want
to connect.

For more accurate information on the
power supply connections, please see

page 6 of this manual.

POWER SUPPLY TERMINAL

FRONT COVER OPENING:

CCESS TO JUMPERS FOR

A

INPUT

AND OUTPUT RANGE

, AND ACCESS TO

SELECTION

SPAN AND OFFSET ADJUST

POTENTIOMETERS

Page 5

User’s Manual DRF Series

SIGNAL ADJUSTMENT

To proceed to adjust a range of input and
output signals, first select with the

appropriate jumpers, the signal ranges

Selection Jumpers : Output Signal Range

SELECTION JUMPERS

OUTPUT SIGNAL

SPAN POTENTIOMETER
OFFSET P OTENTIOMETER

which include your desired adjustment.
Then proceed to the adjustment.

0/20mA

0/10Vdc 0/1Vdc

(4/20mA)

SELECTION JUMPERS

INPUT SIGNAL

FIGURE 3

F

RONT VIEW

WITHOUT

COVER

For your safety select input and output
jumpers BEFORE generating signal

for the adjustment.

Adjustment

1.- Connect input signal to terminals

«signal» and 9 «common»)

2.- Connect a multimeter to the output
signal terminals

Vdc).

(Values in brackets are examples for a
calibration 0/1 KHz = 0/10Vdc)

3.- Input a zero signal (0Hz) .
Operate offset potentiometer until

getting a zero output

4.- Input the difference between the high

and low input levels (1000-0=1000Hz).

.

(4 and 5 for mA or 4 and 6 for

(0Vdc).

Selection Jumpers : Input Signal Range
Selection Jumpers: Input Signal Type
(See next page)

Operate span potentiometer until
getting an output which is the

difference between the high and low
output levels

5.- Input low input level

(8

Operate offset potentiometer until
getting the low level output

6.- Input high input level and check that
that the output also matches the

desired level

If more accurate measurement is needed,
repeat steps 5 and 6.

Most of the input / output combinations
will be properly adjusted within the

instrument accuracy after these steps.
Close front cover once calibration is

finished.

(10-0=10Vdc).

(0Hz).

(1000 Hz=10Vdc).

Page 6

(0Vdc).

Selection Jumpers :
Input Signal Ranges

0/50 KHz

0/30 KHz

User’s Manual DRF Series

0/20 KHz

0/10 KHz

Selection Jumpers :
Input Signal Type

NPN

PNP

NAMUR

0/5 KHz

0/500 Hz

0/100 Hz

0/3 KHz

0/300 Hz

0/60 Hz

0/2 KHz

0/200 Hz

0/40 Hz

0/1 KHz

0/100 Hz

0/20 Hz

Page 7

<200 V AC<24 VAC

Selection : Excitation Voltage

Within the set of jumpers for Input
Signal Range, the last jumper allows

selection of the level of Excitation
Voltage Ouput generated by the DRF.

Vexc .- +15V
(20mA)

Vexc .- 9V2
NAMUR

User’s Manual DRF Series

DIMENSIONS AND CONNECTIONS

9mm

(0.35’’)

93mm

(3.66’’)

22,5mm

(0.89’’)

Special Width for
AC Power models

SENSOR POWERED
EXTERNALLY

DC Powered

NAMUR OR PNP
SENSOR POWERED
FROM DRF

24 Vdc

0 Vdc

110 mm
(4.33’’)

Output Connections

Input Connections

~

AC Powered

~

37mm

(1.46’’)

Page 8

User’s Manual DRF Series

TECHNICAL DATA : DRF-FR

INPUT SIGNAL in FREQUENCY

RANGES 50KHz,30KHz,20KHz,10 KHz

SIGNAL NPN, PNP

Vexc 15 Vdc @ 20mA

OUTPUT SIGNAL in VDC

RANGES 0/10 Vdc

Max Output 11Vdc approx.
Min Output -1Vdc approx.

Min Load R ≥1KOhm

OUTPUT SIGNAL in mA

RANGES 0/20mA (4/20mA)

Max Output 22mA approx.
Min Output -1.5mA approx.
Max Load R ≤400 Ohms

POWER SUPPLY

DC Power 24Vdc ±10%
AC Power 230Vac ±10%50/60 Hz

Consumption <3.8VA

MECHANICAL DIMENSIONS

DC Units 22.5 x 93 x 110 mm
AC Units 37.0 x 93 x 110 mm

Weight DC 120 gr.
Weight AC 200 gr.

Standard DIN rail mounting, as specified on
DIN46277 and DIN EN 50022

37.5 x 7.5 mm

5KHz, 3KHz, 2KHz, 1KHz
500Hz, 300Hz, 200Hz, 100Hz

60Hz, 40Hz, 20Hz
(minimum 10Hz)

NAMUR
PICK-UP Voltage Impulse

SINUSOIDAL up to 200Vac

9V2 for NAMUR

0/1 Vdc

115Vac ±10%50/60 Hz

(1.38 x 0.3 ´´)

GALVANIC ISOLATION LEVELS

DC Units

Input - Output 3,5 KV (60 seconds)
Power-Input 3,5 KV (60 seconds)

Power- Output 1 KV (60 seconds)

AC Units

Input - Output 3,5 KV (60 seconds)
Power- Input 3,5 KV (60 seconds)

Power - Output 3,5 KV (60 seconds)

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
Polution Level 2

GENERAL SPECIFICATIONS

Accuracy <0.2% F.S.
Optimized for 12 bit systems

Linearity <0.1% F.S.
Thermal Drift <250 ppm/ºC Tipical
Warm-Up Time 5 minutes

Response Time for signal ranges of
0/100 Hz <300mS (90% of signal)

0/500 Hz <250mS (90% of signal)
0/5 KHz <200mS (90% of signal)

0/50 KHz <150mS (90% of signal)
Plug-In Screw Terminals

Maximum Wire Section 2.5 mm
Protection IP-30

Temp. Operation from 0 to 60ºC
Temp. Storage from -20 to +70ºC

MATERIALS

Box and Cover in Poliamide PA6 UL94
V-2 blue color

Terminals in Poliamide UL94 V-0

Page 9

2

User’s Manual DRF Series

CAUTIONS, WARNINGS AND NOTES

INSTALATION

PRECAUTIONS.- The installation and the

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
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.

RECOMMENDED FUSES
24 Vdc 230 Vac 115 Vac

250mA 70 mA100 mA
All fuses .-Time Lag Fuse

SAFETY PRESCRIPTIONS.- The unit has

nual contains useful information the user
has to respect in order to warrant a proper

function of the unit, and good security
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
without security degradation. Do all

connections before applying power to the
unit. Do not make wiring changes until
power is disconnected from the unit.

Install the unit far from elements
generating electric noise, or magnetic

future use of this unit
must be done by qualified

personnel. The unit has
not AC (mains) switch,

been designed and tested
under EN-61010-1 rules and
is delivered in good
conditions. This User’s Ma-

fields, such as power relays, electrical
engines, speed regulators, etc. Do not

use until installation is completed.
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
voltage and frequency. Do not connect the

unit to lines which are overloaded or which
provide power to systems working on ON­OFF cycles or inductive loads.

ATTENTION : If the power supply is DC
voltage, be careful with the polarity
indicated for each terminal.

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 :

Do not install the signal input wires in the
same conduit with power lines, heaters,

solenoids, SCR controls, etc ... and always
far from these elements.

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.
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
external power supply, beacuse both units

will be permantently damaged.

Page 10

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.

FOR NON-WARRANTY REPAIRS,

consult
OMEGA for current repair charges. Have the
following information available BEFORE con­tacting 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.

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.

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 unautho­rized 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 PRO­CESSING 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, insur­ance and proper packaging to prevent breakage in transit.

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