FLEX I/O and FLEX Integra

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126 24V dc Thermocouple/RTD Input Module Cat. No. 1794-IRT8 FLEX I/O and FLEX Integra Product Data24V dc Thermocouple/RTD Input Module Cat. No. 1794-IRT8RecommendedTerminal BaseCompatibleTerminal Base(s)T/C-RTD INPUT 8 CHANNEL1794-IRT8TB3GTB3GS3IN0 IN1 IN2 IN3 IN4 IN5 IN6 IN7 PWRF F F F F F F F40865Simplified SchematicInput DeviceShieldedTwisted PairCableA-10IVoltageReference+5V+5V3-Wire RTD ExampleA-1V refA-2MUXGainAmpA/DConverterFlexbusInterface+5V+5VA-3MicroProcessor24VPower Supply+ C34-C-35dc/dcConverter+5V-5VWiring.Connections for1794-TB3G shown0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15+ H L - + H L - + H L - + H L -0-15A40951Channel 0 Channel 1 Channel 2 Channel 316 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 3316-33B+ H L - + H L - + H L - + H L -Channel 4 Channel 5 Channel 6 Channel 7Chassis GndChassis Gnd34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 5134-51C+V COM Chassis Gnd 6 Chassis Groundfor Shields24V dcCJCSupply InChassis Gnd +V COMCJC24V dcSupply Out40620Publication 1794-2.1 - January 2000
FLEX I/O and FLEX Integra Product Data 24V dc Thermocouple/RTD Input Module Cat. No. 1794-IRT8 127RTDType of InputConnect the followingH L + - Shield 1RTD - 2-wire 1 2RTD - 3-wire 3 1 2RTD - 4-wire 1a 2a 1 2Thermocouple 1 2Millivolt 1 21 Terminals 37, 38, and 39 and 46, 47, and 48 are for cold junction compensation (with38 and 47 chassis GND).RTD orThermocoupleChannel2-Wire3-Wire4-Wire1794-TB3G and -TB3GS Terminal Base UnitsHigh SignalTerminal (H)1213211a2a2+mV-Low SignalTerminal (L)RTD SourceCurrent (+)1Thermocouple21MillivoltSignalReturn 1 (-)0 A-1 A-2 A-0 A-31 A-5 A-6 A-4 A-72 A-9 A-10 A-8 A-113 A-13 A-14 A-12 A-154 B-18 B-19 B-17 B-205 B-22 B-23 B-21 B-246 B-26 B-27 B-25 B-287 B-30 B-31 B-29 B-32+24V dc Power 34 and 5024V dc Common 35 and 511 Terminals 37, 38, and 39 and 46, 47, and 48 are for cold junction compensation (with38 and 47 chassis GND).2 Terminals 16, 33, and 40 thru 45 are chassis ground.241019Example of 2-, 3-, and 4-wire RTD and Thermocouple Wiring toa 1794-TB3G Terminal Base UnitThermocouple Channel 42-Wire RTD Channel 13-Wire RTD Channel 24-Wire RTD Channel 30 1 2 3 4 5 6 7 8 9 10 11 12 13 14 150-1516-3334-51ABC1794-TB3GCJC only needed when using thermocouplesCJC = cold junction compensation kit406211794-CJC2/A (kit supplied with module andcontains 2 compensators)Attention: Keep exposed area of inner conductor as short as possible.Note: Module cannot be configured as shown. This is just an example ofdifferent input connections.This is a non-isolated module. You may need to take extra precautions like tyingthe 24V dc common to the earth ground.Example of Millivolt Wiring to a 1794-TB3G Terminal Base UnitMillivoltSource+ -MillivoltSource+ -MillivoltSource+ -MillivoltSource+ -ATTENTION!To reduce susceptibility to noise, power analogmodules and digital modules from separate powersupplies. Do not exceed a length of 10m (33ft) for dcpower cabling.Do not daisy chain power or ground from thisterminal base unit to any ac or dc digital moduleterminal base units.Total current draw through the terminal base unit islimited to 10A. Separate power connections to theterminal base unit may be necessary.0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Data Type0-1516-3334-511794-TB3GATTENTION: Keep exposed area of inner conductor as short as possible.40622ABCBit 11 10 09 08 Data type for channels 0-70 0 0 0 o C or resistance (in Ω)0 0 0 1 o F0 0 1 0 o K0 0 1 1 -32767 to +327670 1 0 0 0 to 655350101 through 1111 not usedModule defaults to -4000 to 10000 in millivolt mode, and 0 to 5000 in ohms mode.Note: For millivolts there are two implied decimals. For degrees and ohms there is oneimplied decimal.Publication 1794-2.1 - January 2000
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FLEX I/O and FLEX Integra Product D
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16 FLEX I/O Terminal Base Unit’s
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20 3-Wire Screw Clamp Terminal Base
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22 Screw Clamp Temperature Terminal
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26 Terminal Base Unit Cat. No. 1794
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28 1794-TBN and -TBNF Wiring FLEX I
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30 AC Module’s Table of Contents
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32 120V ac 8 Input Module Cat. No.
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34 120V ac 8 Isolated Input Module
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38 120V ac 8 Output Module Cat. No.
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40 120V ac 8 Output Isolated Module
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42 120V ac 16 Output Module Cat. No
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46 220V ac 8 Output Module Cat. No.
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48 DC Module’s Table of Contents
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50 DC Module’s Recommended Termin
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