Omega DRG-AR-DC User manual

DESCRIPTION
The DRG-AR-DCisaDINrailmount,
DCvoltageorcurrentinputlimitalarm
with dual setpoints and two contact
closureoutputs. Thefieldconfigurable
inputandalarmfunctionsofferflexible
setpointcapability. Inputvoltagespans
from10mVto200Vandinputcurrent
spansfrom1mAto100mAcanbefield
configured. Bipolar inputs are also
accepted.
TheDRG-AR-DCisconfigurableasa
singleordualsetpointalarm,withHIor
LO trips and failsafe or non-failsafe
operation. Also included are adjust-
able deadbands (0.25 to 5% of full
scaleinput)foreachsetpoint,a24VDC
voltage source (isolated from line
power) for transducer excitation, and
a flexible DC power supply which ac-
cepts any voltage between 9 and
30VDC.
DIAGNOSTICLEDS
The DRG-AR-DC is equipped with
three front panel LEDs. The green
LED is a dual function LED labeled
INPUT. ThisLEDindicateslinepower
and input signal status. Active DC
power is indicated by an illuminated
LED. If this LED is off, check DC
power and wiring connection. If the
input signal is more than 110% of the
fullscalerange,theLEDwillflashat8
Hz. Below 0%, the flash rate is 4 Hz.
TworedLEDsindicatetherelaystate
for each setpoint. An illuminated red
LED indicates the tripped condition.
OUTPUT
TheDRG-AR-DCisequippedwithtwo
SPDT(formC)relays,ratedat120VAC
or28VDCat5amperes. Eachofthese
relays is independently controlled by
the field configurable setpoint and
deadband.
OPERATION
The field configurable DRG-AR-DC
limitalarmsetpointscanbeconfigured
for HI or LO, failsafe or non-failsafe
operation. Each of the setpoints has
arespectiveHIorLOdeadband. Ina
tripped condition, the setpoint is ex-
ceeded and the appropriate red LED
will illuminate. The trip will reset only
when the process falls below the HI
deadband or rises above the low
deadband(seeFigure1). For proper
deadband operation, the HI setpoint
must always be set above the LO
setpoint. In failsafe operation, the
relayisenergizedwhentheprocessis
belowtheHIsetpointorabovetheLO
setpoint(oppositefornon-failsafe). In
the failsafe mode, a power failure
results in an alarm state output.
DYNAMICDEADBAND
LSI circuitry in the DRG-AR-DC pre-
vents false trips by repeatedly sam-
plingtheinput. Theinputmustremain
beyond the setpoint for 100 millisec-
onds, uninterrupted, to qualify as a
validtripcondition. Likewise,theinput
must fall outside the deadband and
remain there for 100 milliseconds to
return the alarm to an untripped con-
dition. This effectively results in a
“dynamic deadband” —based on
time— in addition to the normal
deadband.
Figure1:Limitalarmoperation
andeffectofdeadband(s).
CONFIGURATION
Unlessotherwisespecified,the
factory presets the Model
DRG-AR-DCasfollows:
Input: Current
Range: 0-20mA
Output: Dual,SPDT
Trip: A:HI, B:LO
Failsafe: No
Deadband: A, B: 0.25%
The DC power input accepts any DC
sourcebetween9and30V,typicallya
12V or 24VDC source is used.
For other I/O ranges, refer to Table 1
and Figure 4. Reconfigure switche
SW1forthedesiredinputtype,range
and function.
1. With DC power off, set positions 9
and10of switch“SW1”forcurrent or
voltage.
2.Setposition1through position 4 of
input range switch “SW1” for the de-
sired input range (see Table 1).
3.Set position5 ofinput rangeswitch
“SW1” to ON for unipolar (e.g. zero
based, 0-20mA) range or OFF for
bipolar (e.g. -100% offset,
-20 to 20mA) range (see Figure 4).
4. Set position 6 and 7 of input
rangeswitch“SW1”toONforaHItrip
setpoint or OFF for a LO trip setpoint
(see Figure 4).
5. Set position 8 of input range
switch “SW1” to ON for non-failsafe
operation or OFF for failsafe
operation (e.g. alarm trips upon
power failure).
WARNING: Do not attempt to
change any switch settings with power
applied. Severe damage will result!
50
100
Process (% of Span)
Time
Relay Trips
(LED Red)
Relay Trips
(LED Red)
Relay returns to its
untripped condition
(LED Off)
Relay returns to its
untripped condition
(LED off)
} 10% Deadband
} 10% Deadband
Setpoint
Illustrating HI Setpoint
Illustrating LO Setpoint
DRG-AR-DC
DC Input, Field Configurable Limit Alarm
Instruction Sheet M2399/0796
Inputs
VoltageInput
Range:10mVto+200V
Impedance:>100KΩ
Overvoltage:200Vrms,max.
CurrentInput
Range:1mAto+100mA
Impedance:20Ω,typical
Overcurrent: 170mA rms, max.
Overvoltage:60VDC
(protectedbyselfresetting fuse)
CommonMode(InputtoGround):
1800VDC,max.
LEDIndicators
InputRange(Green)
>110%input:8Hzflash
<0%input:4Hzflash
Setpoint(Red)
Tripped:Solidred
Safe:Off
LimitDifferentials(Deadbands)
>50mV/5mA:0.25%to5%ofspan
<50mV/5mA:1% to5%of span
Response Time
DynamicDeadband:Relaystatus
willchangewhenproper
setpoint/processconditionexists
for 100msec.
NormalMode(analogfiltering):
<250mSec,(10-90%)
Setpoints
Effectivity:Setpointsareadjustable
over100%oftheselectedinput
span.
Repeatability(constanttemp.):
>50mV/5mA:0.1%offullscale
<50mV/5mA:0.2%offullscale
Stability
Temperature:+0.05%offull
scale/°C, max.
ExcitationVoltage
24VDC,20mA,maximum
Common Mode Rejection
DCto 60Hz:120dB
Isolation
1800VDCbetweencontacts,input
andpower
EMC Compliance (CE Mark)
Emmissions:EN50081-1
Immunity:EN50082-2
Safety:EN50178
Humidity(Non-Condensing)
Operating:15to95%(@45°C)
Soak:90%for24hours(@65°C)
Temperature Range1
Operating:0 to55°C (32to131°F)
Storage:-25 to70°C (-13to158°F)
Power
Consumption:1.5Wtypical,
2.5W max.
SupplyRange:9to30VDC,
inverterisolated
In-rushCurrent:300mA,max.
RelayContacts
2 SPDT (2 form C) Relays
1Relaypersetpoint
CurrentRating(resistive)
120VAC:5A
240VAC:2A
28VDC:5A
Material:Silver-CadmiumOxide
ElectricalLife:105operations
atratedload
Note:External relaycontact
protectionisrequiredforuse
withinductiveloads(see
Figures 2 & 3).
MechanicalLife:107operations
WireTerminations
Screwterminations for12-22AWG
AgencyApprovals
CSAcertifiedperstandardC22.2,No.
0-M91 and 142-M198 (File
No.LR42272)ULrecognizedperstan-
dard per standard UL508 (File
No.E99775). CE conformance per
EMC directive 89/336/EEC and Low
Voltage 73/23/EEC (Input<75VDC,
only).
Mounting
32mm and 35mm DIN Rail
PIN CONNECTIONS
11 N.O.RelayB
12 Com. Relay B
13 N.C.RelayB
21 DC Power (+)
22 DC Power (-)
23 NoConnection
41 AnalogInput(+)
42 AnalogInput (-)
43 (+)24VDCExcitation
ServicingNorth America:
Fax: [phone]
e-mail: [email protected]
Fax: [phone]
Fax: [phone]
ServicingEurope:
Fax:[phone]
Fax:[phone]
Postbus 8034, 1180 LA Amstelveen, The Netherlands
Tel: [phone]
Toll Free in Benelux: 06 0993344
e-mail: [email protected]
Ostravska 767, 733 01 Karvina
Tel: [phone]
e-mail: [email protected]
9, rue Denis Papin, 78190 Trappes
Tel:[phone]
Toll Free in France: 05-4-06342
e-mail: [email protected]
Daimlerstrasse 26, D-75392 Deckenpfronn, Germany
Tel:[phone]
Toll Free in Germany: 0130 11 21 66
e-mail: [email protected]
25 Swannington Road,
Broughton Astely, Leicestershire,
LE9 6TU, England
Tel: [phone]
Fax: [phone]
Fax:[phone]
Fax:[phone]
P.O. Box 7, Omega Drive
Irlam, Manchester,
M44 5EX, England
Tel: [phone]
Fax: [phone]
TollFree in England:0800-488-488
e-mail:[email protected]
976 Bergar
Laval (Quebec) H7L 5A1
Telephone: [phone]
e-mail: [email protected]
Forimmediate technicalsevice orapplicationassistance:
Sales Service: 1-800-826-6342 / 1-800-TC-OMEGASM
Customer Service: 1-800-622-2378 / 1-800-622-BESTSM
Engineering Service: 1-800-872-9436 / 1-800-USA-WHENSM
TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA
Tel: (95) 800-TC-OMEGASM
En Espanol: [phone] ext. 2203
One Omega Drive, Box 4047
Stamford, CT 06907-0047
Telephone: [phone]
e-mail:[email protected]
USA:
ISO 9001 Certified
Canada:
USAand Canada:
Mexicoand
Latin America:
Benelux:
CzechRepublic:
France:
Germany/Austria:
UnitedKingdom:
ISO 9002 Certified
Internet e-mail
[email protected]
OMEGAnetSM On-LineService
http://www.omega.com
WARRANTY/DISCLAIMER
RETURNREQUEST/ INQUIRIES
Directallwarrantyandrepairrequests/inquiriestotheOMEGACustomerServiceDepartment. BEFORERETURNINGANYPRODUCT(S)TOOMEGA,PURCHASER
MUSTOBTAINANAUTHORIZEDRETURN(AR)NUMBERFROMOMEGA'SCUSTOMERSERVICEDEPARTMENT(INORDERTOAVOIDPROCESSING
DELAYS).TheassignedARnumbershouldthenbemarkedontheoutsideofthereturnpackageandonanycorrespondence.
Thepurchaserisresponsibleforshippingcharges,freight,insuranceandproperpackagingtopreventbreakageintransit.
FORWARRANTYRETURNS,pleasehavethefollowinginformation
availableBEFOREcontactingOMEGA:
1. P.O.numberunderwhichtheproductwasPURCHASED,
2. Modelandserialnumberoftheproductunderwarranty,and
3. Repairinstructionsand/orspecificproblemsrelativetotheproduct
OMEGAENGINEERING, INC.warrantsthis unittobe freeofmanufacturing defectsforthe lifeofthe product.
If the unit should malfunction, 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 being damaged as a result of excessive corrosion; or current, heat, moisture or vibration; improper specifica-
tion; misapplication; misuse or other operating conditions outside of OMEGA's control. Components which wear are not warranted, including but 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 it 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 MER-
CHANTABILITY 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 WAR-
RANTY/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.
FORNON-WARRANTY REPAIRS,consultOMEGAforcurrentrepair
charges.HavethefollowinginformationavailableBEFOREcontactingOMEGA:
1. P.O.numbertocovertheCOSToftherepair,
2. Modelandserialnumberofproduct,and
3. Repairinstructionsand/orspecificproblemsrelativetotheproduct.
OMEGA'spolicyistomakerunningchanges,notmodelchanges,wheneveranimprovementispossible.Thisaffordsourcustomersthelatestintechnologyand
engineering.
OMEGAisaregisteredtrademarkofOMEGAENGINEERING,INC.
ãCopyright 1996OMEGAENGINEERING,INC.Allrightsreserved.Thisdocumentationmaynotbecopied,photocopied,reproduced,translated,orreduced toany
electronicmediumor machine-readableform,in wholeorinpart, withoutpriorwritten consentofOMEGAENGINEERING, INC.
It is the policy of OMEGA 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 Engineering, Inc. accepts no liability for any errors it contains, and reserves the right to alter
specifications without notice.
WARNING: These product are not designed for use in, and should not be used for, patient connected applications.
721−0607−00Β 11/97

SPECIFICATIONS
RELAYPROTECTIONAND
EMISUPPRESSION
When switching inductive loads,
maximumrelaylifeandtransientEMI
suppressionisachievedusingexter-
nal protection (see Figures 2
and 3). Place all protection devices
directlyacrosstheloadandminimize
all lead lengths. For AC inductive
loads, place a properly-rated MOV
across the load in parallel with a
series RC snubber. Use a 0.01 to
CALIBRATION
1.Afterconfiguring theDIPswitches,
connect the input to a calibrated DC
sourceandapplypower.Refertothe
terminal wiring (Figure 7).
Note: To maximize thermal stability, final
calibrationshouldbeperformedintheop-
eratinginstallation,allowingapproximately
1 to 2 hours for warm up and thermal
equilibrium of the system.
2. Setpoint: set deadband at its mini-
mum (fully counter clockwise) before
adjusting the setpoint. With the de-
sired trip voltage or current input ap-
plied, adjust setpoint until the relay
trips. ForHItripcalibration,startwith
thesetpointabovethedesiredtrip(full
clockwise). For LO trip calibration,
startbelowthedesiredtrip(fullcounter
clockwise).
3. Deadband: Set deadband to its
minimum (fully counter clockwise).
Setthesetpointtodesiredtrip. Adjust
voltage/current input until relay trips.
Readjustdeadbandto5%(fullyclock-
wise). Setvoltage/currentinputsignal
todesireddeadbandposition. Slowly
adjustdeadbanduntil relayuntrips.
Table1:DRG-AR-DC InputRange
switchsettings (SW1through4)
KEY = ON
0.1µFpulsefilmcapacitor(foilpolypro-
pylene recommended) of sufficient
voltage, and a 47Ω, 1/2W carbon
resistor. ForDCinductiveloads,place
a diode across the load (PRV > DC
supply, 1N4006 recommended) with
(+)tocathodeand(-)toanode(theRC
snubberisanoptionalenhancement).
Load
Load
Diode
(optional)
Power
Power
MOV
0.1uF
Film
0.1uF
Film
Figure 3: AC Inductive Loads
Figure 2: DC Inductive Loads
47 ohm
1/2W
47 ohm
1/2W
Relay
Contacts
Relay
Contacts
+-
Note1: All DRG Series modues are designed and tested to operate in ambient temperatures from 0 to
55 ° C, when mounted on a horizontal DIN rail. When five or more modules are mounted on a vertical
rail, circulating air or model DRG-HS01 Heat Sink is recommended.
Figure4:DRG-AR-DCInputRange/Function
Selection(SW1) FactoryDefault Settings
Warning: Do not attempt to
change any switch settings
withpowerapplied.Severe
damagemayoccur!
Figure5: DRG-AR-DCFactoryCalibration;
0-20mA, A-HI/B-LO,Non-Failsafe
Figure 6: Typical connections of voltage or
current inputs for DRG-AR-DC
DIMENSIONS
Figure 8: Mechanical Dimensions for DRG-AR-DC
Figure 7: Terminal Wiring Diagram for DRG-AR-DC