GE IC670ALG620 Datasheet Download Page 10

9

RTD Input Module

GFK-1206D 

 Analog Input Module

 June 1997 

   

 

Diagnostics

The RTD module performs diagnostics and provides the diagnostic data to the BIU using its
configured discrete input (I) references, starting at the configured reference offset.

The RTD sets the appropriate bit when a diagnostic condition is detected. The bit remains set
until cleared.

7 6 5 4 3 2 1 0

Low alarm for RTD 1
High alarm for RTD 1
Low alarm for RTD 2
High alarm for RTD 2
Low alarm for RTD 3
High alarm for RTD 3
Low alarm for RTD 4
High alarm for RTD 4

Circuit Diagnostics Bits (byte 0)

7 6 5 4 3 2 1 0

Input underrange, RTD 1
Input overrange, RTD 1

Circuit Diagnostics Bits (byte 1)

Input underrange, RTD 2
Input overrange, RTD 2
Input underrange, RTD 3
Input overrange, RTD 3

Input underrange, RTD 4
Input overrange, RTD 4

7 6 5 4 3 2 1 0

Open Wire, RTD 1

Circuit Diagnostics Bits (byte 2)

Open Wire, RTD 2
Open Wire, RTD 3
Open Wire, RTD 4

Shorted input, RTD 1
Shorted input, RTD 2
Shorted input, RTD 3
Shorted input, RTD 4

7 6 5 4 3 2 1 0

Wiring error, RTD 1

Circuit Diagnostics Bits (byte 3)

Wiring error, RTD 2
Wiring error, RTD 3
Wiring error, RTD 4

spare
spare
spare
spare

Clearing Faults and Alarms

Four optional discrete output bits in the BIU’s discrete output (Q) table can be used to clear
module faults and alarms.

Setting the discrete output bit for an RTD clears all diagnostic bits for that RTD that may be
set.

7 6 5 4 3 2 1 0

Clear All Faults on RTD 1
Clear All Faults on RTD 2
Clear All Faults on RTD 3
Clear All Faults on RTD 4
not used
not used
not used
not used

Output Command Bits to Clear Diagnostics

Summary of Contents for IC670ALG620

Page 1: ...re input http www cimtecautomation com parts p 14496 ic670alg620 aspx Provides the wiring diagrams and installation guidelines for this GE Field Control module For further information please contact Cimtec Technical Support at 1 866 599 6507 sales cimtecautomation com ...

Page 2: ...ms H Selectable RTD input as resistance or temperature Celsius or Fahrenheit H Reportshigh low underrange over range open wire and input short alarms H Uses optional discrete inputs and outputs for status and control H Two data acquisition rates based on 50 Hz and 60 Hz line frequencies H Configurable channel activation 46722 1 2 3 4 SLOT Power Sources No loop power is required for this module The...

Page 3: ... has been configured for that input The microprocessor selects the input by means of a solid state optically coupled multiplexer Three measurements are made for each input Excitation current RTD resistance including field wire drop and field wire drop From these three measurements the module calculates the RTD resistance A DC DC converter circuit isolates the field side from the logic circuits 467...

Page 4: ...ms tenths of degrees Fahrenheit or tenths of degrees Celsius This module exchanges data with a BIU in the same manner as other types of I O modules it provides all its input data and status bits when requested by the BIU and receives fault clearing commands from the BIU via its assigned output bits Note that the BIU can be configured not to send status data over the network The module can also be ...

Page 5: ...le s optional fault clearingbitsintheBIU sdiscrete output Q table 8 0 8 Discete Output DataReference Startingoffsetforthemodule soptional fault clearingbitsintheBIU sdiscete outputtable userselectable AnalogOutput Data Length Word length for analog output data in the BIU sanalogoutput AQ table Should not beusedformostapplications 0 0 4 AnalogOutput DataReference Starting offset for the module s an...

Page 6: ...imit If alarm reporting is not wanted alarm limits can be set beyond the dynamic range of the signal so they will never be activated Input Selection to Include RTD Type Each input channel can have a different RTD type selectable from a list of many different RTDs If the actual RTD resistance does not match the defined type an adjustment factor can be configured in tenths of ohms Selection Comments...

Page 7: ...00 100 Ohm Platinum α 00385 27 01 389 936 180 0 850 0 100 Ohm Platinum α 003902 93 5400 135 000 17 7777 99 9999 100 Ohm Platinum IPTS68 PA 26 5 327 744 200 0 630 0 100OhmPlatinumSAMA RC21 4 PC 26 5 311 874 200 0 600 0 100 Ohm Platinum JISC 1604 81 26 5 323 780 200 0 620 0 25 5 Ohm Platinum Lab Std PJ 4 50 83 575 200 0 630 0 9 035 Ohm Copper CA 6 05 16 400 100 0 260 0 50OhmCopper CB 2 28 379 105 78...

Page 8: ...input to logic user input to frame ground 1500VAC for 1 minute 250 VACcontinuous Channel to Channel 250 VACcontinuous Current drawn from BIU power supply 190mA maximum DigitalResolution 15 bits plus sign Operatingtemperaturerange 0 to 55 Degrees C ambient Channel Characteristics RTDtypes 10 25 100 and 1000 ohm platinum 10 and 100 ohm copper 100 50 and 120 ohm nickel 604 ohms and 1000 ohms nickel i...

Page 9: ...er module Each terminal can accommodate one or two wires up to AWG 14 avg 2 1mm2 cross section TheI OTerminal Block with Connectors IC670CHS003 has one 20 pin male connector per module I O Terminal Block with Box Terminals IC670CHS002 and 102 I O Terminal Block with Barrier Terminals IC670CHS001 and 101 Ter minals E1 E2 E4 E6 and E8 are electrically connected together A1 and A2 are electrically co...

Page 10: ...overrange RTD 2 Input underrange RTD 3 Input overrange RTD 3 Input underrange RTD 4 Input overrange RTD 4 7 6 5 4 3 2 1 0 Open Wire RTD 1 Circuit Diagnostics Bits byte 2 Open Wire RTD 2 Open Wire RTD 3 Open Wire RTD 4 Shorted input RTD 1 Shorted input RTD 2 Shorted input RTD 3 Shorted input RTD 4 7 6 5 4 3 2 1 0 Wiring error RTD 1 Circuit Diagnostics Bits byte 3 Wiring error RTD 2 Wiring error RTD...

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