YOKOGAWA GX20

8
All Rights Reserved. Copyright © 2014, Yokogawa Electric Corporation
GS 04L53B01-01EN May. 19, 2017-00
• Allowablewiringresistance:Max.10Ωperline
forRTDinput(conductorresistancebetweenthe
threelinesshallbeequal)
• Effectofwiringresistance:±0.1°C/10ΩforRTD
input(conductorresistancebetweenthethree
linesshallbeequal),±1°C/10Ω(50Ωsystemor
less,High-speeduniversaltype)
 4-wireRTD/resistancetype
  4-wireRTD100Ωsystemormore:±0.1°C/10Ω
  4-wireRTD50Ωsystemorless:±1°C/10Ω
  Resistance20Ω:±0.001Ωorless
  Resistance200Ω:±0.01Ωorless
  Resistance2000Ω:±0.1Ωorless
• Allowableinputvoltage:
Universal,Lowwithstandvoltagerelay,
Electromagneticrelaytype:
 ±10VDCforTC/DCvoltage(1Vrangeorless)/
RTD/DI(contact)input,DCmA
±60VDCforDCvoltage(2Vrangeormore)input/
DI(level)input
 High-speeduniversaltype:
 ±120VDC
• Allowableinputcurrent(current(mA)inputtype):
24mA,50/60Hz,peakvalueincludingsignal
• Noisereductionratio
 Universal,Lowwithstandvoltagerelay,current
(mA)input,Electromagneticrelay,4-wireRTD/
resistance type:
Integration time
*1
Normal mode Common mode
1.67ms 50/60 Hz, no
noise reduction
More than 80 dB
*2 *4
More than 16.67
ms
More than 40 dB
*2 *3
More than 120 dB
*2 *4
 High-speeduniversaltype:
Scan interval
*1
Normal mode Common mode
20msorless 50/60 Hz, no
noise reduction
More than 80 dB
*2 *4
Morethan50ms More than 40 dB
*2 *3
More than 120 dB
*2 *4
*1 Afrequencydiscriminationsettingismadeinthe
mainunit.
*2 Aresistancetemperaturedetectorrangeisaconverted
valueofvoltagewhenameasuredcurrentows.
*3 50/60Hz±0.1%
*4 50/60Hz±0.1%,500Ωimbalance,between
minusmeasuringterminalandground
• NormalmodevoltageforTC/DCvoltage(1V
rangeorless)/DI(voltage):1.2timesorlessof
rated range
  Standardsignal0.4to2Vrange:2.4V
  Standardsignal1-5Vrange:6V
  RTD(100Ωsystemormore):50mVpeak
  RTD(50Ωsystemorless):10mVpeak
* 50/60Hz,Thepeakvalueincludingthesignal.
 4-wireRTD/resistance
  Resistance(2000Ω),RTD(100Ω,500Ω
1000Ωsystem):50mVpeak
  Resistance(200Ω),RTD(10Ω,25Ω50Ω
system):10mVpeak
  Resistance(20Ω):4mVpeak
• Normalmodecurrent(current(mA)inputtype):
24mADC(Valueconvertedtovoltage:6V)
 *50/60Hz,Thepeakvalueincludingthesignal.
• Burnoutdetection
*1 *2
: Burnout upscale,
downscale,orOFFselectable(foreach
channel).
Availableinput:TC,RTD,Standardsignal
Detection condition;
TC;
Universal,Lowwithstandvoltagerelay,
Electromagneticrelaytype
 Normal:2kΩorless.,Burnout:200kΩor
more(parallelcapacitanceof0.01μForless)
 Detectioncurrent:Approx.10μA
High-speeduniversaltype
Detection current: Approx. 50 nA,
Superposedelectriccurrentsystem
RTD;
Universal,Lowwithstandvoltagerelay,
Electromagneticrelaytype
 Normal:wiringresistanceorless,Burnout:
200kΩormore
 parallelcapacitanceoflessthan0.01μFor
less
 Detectioncurrent:Approx.10μA
High-speeduniversaltype
Detection current: Approx. 100 nA,
Superposedelectriccurrentsystem
Standard signal:
 Normal:Withinmeasuringrange
Burnout: Depends on the setting of the
burnoutjudgmentvalue.Theburnout
judgmentvalueshallbesetwiththe
percentageofthespeciedspanwidth.
 Lowerlimit:-20.0to-5.0%
 Upperlimit:105to120%
*1Noneforthe4-wireRTD/resistancetype
*2IfthescanintervalonthehighspeedAI
moduleis1to20ms,burnoutdetectionwill
not work correctly.
• Inputexternalresistance:
DCvoltage,thermocoupleinput:2kΩorbelow
Resistancetemperaturedetectorinput:10Ω
orbelowineachwire(Sameresistancein
threewires)
• Inputbiascurrent:±10nAorless(whenburnout
functiondoesnotwork)
• Measuredcurrent(forRTD):
 universaltype:Approx.1mA
 High-speeduniversaltype:Approx.1mA/1.6mA
(dependsontherange)
 4-wireRTD/resistance:Approx.1mA/0.25mA
(dependsontherange)
• Inputresistance:
10MΩormoreforTC/DCvoltage(1Vrangeor
less)input
Approx.1MΩforDCvoltage(2Vrangeor
more)/standardsignalinput/DIvoltage(High-
speeduniversaltype)/whilemeasurementis
stopped(High-speeduniversaltype)
250Ω(249.5Ωtyp)forDCmA
 *typ:Typicalvalue(Typical)
• Allowablesignalsourceresistance:2kΩorless
forTC/DCvoltage(1Vrangeorless)input
• Effectofsignalsourceresistance:
±10μV/1kΩorlessforTC/DCvoltage(1Vrange
orless)input
±0.15%ofrdg/1kΩorlessforDCvoltage(2V
rangeormore)/standardsignalinput