Omega DRG-SC-AC User manual

DESCRIPTION
ThefieldconfigurableDRG-SC-ACis
a DIN rail mount, AC input signal
conditioner with 1800VDC isolation
betweeninput,outputandpower.The
field configurable input and output
offersflexible,wideranging capability
for scaling, converting or buffering
AC inputs ranging from 5mA to
100mAACor50mVto200VAC. The
DCoutputoftheDRG-SC-ACispro-
portional to the average of the of the
fully-rectified AC input signal, and is
calibratedforsinewavesbetween40-
400Hz.
Forcurrentinputsabove100mAAC,it
is recommended that an input shunt
resistorbeusedandtheDRG-SC-AC
be configured for the proper input
range. Forexample,a5AACcurrent
transformer output can use a 0.1Ω,
5Wshuntresistorandsettheinputof
the DRG-SC-AC for 0-500mVAC.
APPLICATION
TheDRG-SC-ACisusefulinapplica-
tionsrequiringanisolated,conditioned
DCoutputfromanACsignal. Typical
applicationsincludeenergymanage-
ment, load shedding, motor current/
load monitoring, locked rotor detec-
tion, isolation and data acquisition.
The output of the DRG-SC-AC can
driveadigitalmeterfordirect display
orcaninterfacewithalarmingorcon-
troldevicesincludingPLCsandcom-
puters.
DIAGNOSTICLED
The DRG-SC-AC is equipped with a
dualfunctionLEDsignalmonitor. The
green, front mounted LED indicates
bothDCpowerandinputsignalstatus.
Active DC power is indicated by an
illuminatedLED. If the inputsignalis
morethan110%ofthefull-scalerange,
theLEDwillquicklyflashat8Hz. Ifthis
continues to occur, you may wish to
change your full-scale input range
setting.
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.
WARNING: Donotattemptto
changeanyswitchsettingswithpower
applied. Severedamagewillresult!
DRG-SC-AC
AC Input, Field Configurable Isolator
Instruction Sheet M2389/0796
CONFIGURATION
Amajoradvantageofthe
DRG-SC-ACisitswiderangingcapa-
bilitiesandeaseofconfiguration. The
DRG-SC-AChas15inputrangeswitch
settings.
Trimpotentiometersallow50%input
zeroandspanadjustablitywithineach
of the 15 full-scale input ranges.
Forexample,the200Vswitchsetting
inTable1configurestheinputfora0
to200VACrange. Sincethespancan
becontractedby50%,thisenablesan
input span as narrow as 100VAC of
the range. This span can be posi-
tionedanywherewithinthe0-200VAC
range with a zero offset as large as
50% of the full scale range (e.g. 100
to 200VAC range).
Unlessotherwisespecified,the
factory presets the Model
DRG-SC-ACasfollows:
InputRange: 0-500mVAC
Output: 4-20mA
The DC power input accepts any DC
sourcebetween9and30V,typicallya
12V or 24VDC source is used
Refer to Tables 1 through 3 for the
proper switch settings. With power
disconnected, use the switches on
SW1toselecttheinputtype(voltageor
current),onSW2toselecttheHIorLO
inputranges,andonSW4toselectthe
desired input range. Using the
switches on SW3, select the desired
type of output.
CurrentOutput
Output:0-1mA,0-20mA,
4-20mA
SourceImpedance:>100KΩ
Compliance:
0-1mA;7.5V,max.(7.5KΩ,max.)
0-20mA;12V,max.(600Ω,max.)
4-20mA;12V,max.(600Ω,max.)
LED Indicator (green)
8Hzflash when input is 10%
abovefullscale range (FSR)
Accuracy(IncludingLinearity,Hyster-
esis)
+0.1%of span, typical
+0.5% of span, maximum
Stability
+0.025%/°Cofselectedinput
span,typical.
Response Time (10 to 90%)
250mSec.,typical.
Common Mode Rejection
DCto 60Hz: 120dB
Isolation
1800VDCbetweeninput,output
andpower.
EMC Compliance (CE Mark)
Emissions:EN50081-1
Immunity:EN50082-2
Safety:EN50178
Humidity(Non-Condensing)
Operating:15 to 95%(@ 45°C)
Soak: 90% for 24 hours (@ 65°C)
Temperature Range
Operating:0to55°C
(32to131°F)
Storage:-25to70°C
(-13to158°F)
Power
Consumption:1.5Wtypical,
2.5W max.
Range:9to30VDC
WireTerminations
Screw terminals for 12-22 AWG
AgencyApprovals
CSAcertifiedperstandardC22.2,
No.0-M91and142-M1987(FileNo.
LR42272).UL recognizedper stan-
dardUL508(FileNo.E99775).CE
ComplianceperEMCdirective89/
336/EECandLowVoltage73/23/EE.
Mounting
32mm and 35mm DIN Rail
PIN CONNECTIONS
11 DC Power (+)
12 DC Power (-)
21 DC Power (+)
22 DC Power (-)
41 ACSignalInput(Hot)
42ACSignalInput(Neu)
51 Output (+)
52Output (-)
SPECIFICATIONS
Inputs
VoltageInput
Ranges:100mVto200VAC
Impedance:>100KΩ
Overvoltage:300VAC
CurrentInput
Ranges:10mAto100mAAC
Impedance:20Ω,typical
Overcurrent:200mAAC
Overvoltage:60Vpeak
FrequencyRange:40to400Hz,
factorycalibratedat60Hz
CommonMode(InputtoGround):
1800VDC,max.
ZeroandSpanRange:
ZeroTurn-Up:50%offull
scalerange
SpanTurn-Down:50%offull
scalerange
Output
VoltageOutput
Output:0-5V,0-10V
SourceImpedance:<10Ω
Drive:10mA,max.
(1KΩ, min. @ 10V)
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721-0610-00B 11/96

TYPICALAPPLICATION
Figure2:Loadmonitoringusinga current
transformer and the DRG-SC-AC
Figure1: DRG-SC-ACFactory Calibration:
0-500mVAC,4-20mA
Warning: Do not attempt to
change any switch settings
withpowerapplied. Severe
damagemayoccur!
Figure 3: Wiring Diagram for DRG-SC-AC Figure 5: Mechanical Dimensions for DRG-SC-AC
CALIBRATION
1. After configuring the DIP
switches,connecttheinputtoacali-
brated AC source. Connect the
outputoftheactualdeviceload(ora
loadapproximatelyequivalenttothe
actual device load value) and apply
power. RefertotheTerminalWiring
Diagram. (Figure 3)
NOTE: to maximize thermal stability, fi-
nalcalibrationshouldbeperformedinthe
operatinginstallation,alllowingapproxi-
mately 1 to 2 hours for warm up and
thermal equilibrium of the system.
2. Set the calibrator to the desired
minimumandadjustthezeropoten-
tiometer for the desired minimum
output.
3. Set the calibrator to the desired
maximumandadjustthespanpoten-
tiometer for the desired maximum
output.
4.Repeatsteps2and3,ifnecessary
for best accuracy.
Figure1:DRG-SC-ACInputRangeSelector-SwitchSettings
Figure2:DRG-SC-ACOutputRangeSelector-SwitchSettings
Figure 3: DRG-SC-AC Input Jumper Settings