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1794 FLEX I/O

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Analog, Thermocouple, and RTD I/O Modules


FLEX Analog Input Modules


Cat. No.♠  Number of Inputs Signal Range Input Conversion Rate Input Resolution Absolute Accuracy Step Response to 63% of FS External DC Supply Current, Nom. Power Dissipation, Max. Terminal Base Unit
1794-IE8
1794-IE8K∆ 
8 single-ended inputs 4…20 mA
0…20 mA
±10V
0…10V
256 ms all channels 12 bits - Unipolar, 11 bits + sign - Bipolar
5.13 mA/Cnt
2.56 mV/Cnt - Unipolar
5.13 mV/Cnt - Bipolar
Current Input: 0.20% Full Scale at 25 °C
Voltage Input: 0.20% Full Scale at 25 °C⋆ 
Current Input: 18.2 ms
Voltage Input: 9.4 ms
60 mA at 24V DC 3.0 W at 31.2V DC 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS
1794-IE8XT 1794-TB2, -TB3, -TB3S, -TB3T, -TB3TS
1794-IF4I 4 Isolated inputs 4…20 mA
0…20 mA
±20 mA
±10V
0…10V
±5V
0…5V
2.5/5.0/7.5 ms all channels 16 bits - Unipolar, 15 bits + sign - Bipolar
0.320 mA/Cnt - Unipolar
0.640 mA/Cnt - Bipolar
0.156 mV/Cnt - Unipolar
0.313 mV/Cnt - Bipolar
Current Input: 0.1% Full Scale at 25 °C
Voltage Input: 0.1% Full Scale at 25 °C⋆ 
Current or Voltage Input:
1200 Hz conversion rate = 0.6 ms
600 Hz conversion rate = 6.7 ms
300 Hz conversion rate = 13.4 ms
150 Hz conversion rate = 26.7 ms
80 mA at 24V DC 2.0 W at 31.2V DC 1794-TB2, 1794-TB 3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, 1794-TBN
1794-IF4IXT
1794-IF4ICFXT
1794-IE12 12 single-ended Non-isolated inputs 4…20 mA (user configurable)
0…20 mA (user configurable)
8.0 ms all channels 320 mV/cnt
0.641 mA/cnt
Current Input: 0.1% Full Scale at 25 °C
Voltage Input: 0.1% Full Scale at 25 °C⋆ 
Current or Voltage Input: 1.3 s (0.09 s with Quick Step) 30 mA at 24V DC; 45 mA at 10.0V DC 1.2 W at 31.2V DC; 1.1 W at 24V DC; 0.9 W at 10.0V DC 1794-TB3G or 1794-TB3GS
♠ Catalog numbers ending in (K) = Conformal Coated, (XT) = extreme environment.
∆ Each module's channel is individually selectable.
⋆ Includes offset, gain, non-linearity, and repeatability error terms.

FLEX Thermocouple and RTD Input Modules

Cat. No.♠  Number of Inputs Input Signal Range Input Resolution External DC Supply Current, Nom. Power Dissipation, Max. Terminal Base Unit
1794-IR8 8  RTD, Strain Gauge 1…433 W 16 bits across 435 W 140 mA at 24V DC 3 W at 31.2V DC 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, 1794-TBKD
The 1794-IR8 is a temperature-measuring module that accepts 2-, 3-, and 4-wire RTDs. Use the 1794-IR8 in applications where channel fast-update rate is not required. If you need channel fast-update rates, use the 1794-IRT8 module.
1794-IRT8
1794-IRT8K
1794-IRT8XT
8  RTD, Thermocouple, Millivolt, Strain Gauge -40…100 mV DC for thermocouples
0…325 mV for RTDs
14 bits 95 mA at 24V DC 3.0 W at 31.2V DC 1794-TB3G, 1794-TB3GS, 1794-TB3GK
The 1794-IRT8 and -IRT8K (conformal coated version) are high-speed, high-accuracy temperature/mV measuring module that accepts thermocouple inputs, 2-, 3-, and 4-wire RTD inputs, and mV source inputs. The 1794-IRT8 also offers wire-off, over-range, and under-range detection. Use cold-junction compensators (1794-CJC2) in thermocouple mode. Two cold-junction compensators are shipped with the these modules.
The 1794-IRT8XT is the extreme environment version, rated for operation at temperatures of -20…70 °C (-4…158 °F).
1794-IT8 8  Thermocouple, Millivolt ±76.5 mV 16 bits (2.384 mV typical) 150 mA at 24V DC 3 W at 31.2V DC 1794-TB3T, 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3TS
The 1794-IT8 is a temperature/mV measuring module that accepts inputs from a variety of thermocouples and from the mV source in the range of ±76.5 mV. Use cold-junction compensators (1794-CJC2) in thermocouple mode. Two cold-junction compensators are shipped with the 1794-IT8.
♠ Catalog numbers ending in (K) = Conformal Coated, (XT) = extreme environment.

Thermocouple and RTD Modules—Sensors Supported

1794-IR8 1794-IRT8K, 1794-IRT8XT 1794-IT8
RTD
Resistance:
100 W Pt m = 0.00385 Euro (-200…+870 °C)
100 W Pt m = 0.003916 U.S. (-200…+630 °C)
200 W Pt m = 0.00385 Euro (-200…+630 °C)
500 W Pt m = 0.00385 U.S. (-200…+630 °C)
100 W Nickel m = 0.00618 (-60…+250 °C)
120 W Nickel m = 0.00672 (-60…+250 °C)
200 W Nickel m = 0.00618 (-60…+250 °C)
500 W Nickel m = 0.00618 (-60…+250 °C)
10 W Copper m = 0.00427 (-200…+260 °C)
Resistance:
100 W Pt m = 0.00385 Euro (-200…+870 °C)
100 W Pt m = 0.003916 U.S. (-200…+630 °C)
200 W Pt m = 0.00385 Euro (-200…+400 °C)
200 W Pt m = 0.003916 U.S. (-200…+400 °C)
100 W Nickel m = 0.00618 (-60…+250 °C)
120 W Nickel m = 0.00672 (-80…+320 °C)
200 W Nickel m = 0.00618 (-60…+200 °C)
10 W Copper m = 0.00427 (-200…+260 °C)
Thermocouple
Type B: 300…1800 °C (572…3272 °F)
Type E: -270…1000 °C (-454…1832 °F)
Type J: -210…1200 °C (-346…2192 °F)
Type K: -270…1372 °C (-454…2502 °F)
Type TXK/XK (L):-200…800 °C (-328…1472 °F)
Type N: -270…1300 °C (-454…2372 °F)
Type R: -50…1768 °C (-58…3214 °F)
Type S: -50…1768 °C (-58…3214 °F)
Type T: -270…400 °C (-454…752 °F)
Type B: 300…1800 °C (572…3272 °F)
Type C: 0…2315 °C (32…4199 °F)
Type E: -270…1000 °C (-454…1832 °F)
Type J: -210…1200 °C (-346…2192 °F)
Type K: -270…1372 °C (-454…2502 °F)
Type N: -270…1300 °C (-454…2372 °F)
Type R: -50…1768 °C (-58…3214 °F)
Type S: -50…1768 °C (-58…3214 °F)
Type T: -270…400 °C (-454…752 °F)
Type TXK/XK (L): -200…800 °C (-328…1472 °F)
 

FLEX Analog Combination I/O Modules


Cat. No.♠  Number of Inputs/Outputs Signal Range Conversion Rate Input Resolution Absolute Accuracy Step Response to 63% of FS External DC Supply Current, Nom. Power Dissipation, Max. Terminal Base Unit
1794-IE4XOE2 4 inputs/2 single-ended  outputs 4…20 mA
0…20 mA
±10V
0…10V
Inputs: 256 ms all channels
Outputs: 1.024 ms all channels
12 bits - Unipolar, 11 bits + sign - Bipolar
5.13 mA/Cnt
2.56 mV/Cnt - Unipolar
5.13 mV/Cnt - Bipolar
Current Input: 0.20% Full Scale at 25 °C
Voltage Input: 0.20% Full Scale at 25 °C
Current Output: 0.425% Full Scale at 25 °C
Voltage Output: 0.133% Full Scale at 25 °C⋆ 
Current Input: 18.2 ms
Voltage Input: 9.4 ms
70 mA @ 24V DC 4.0 W at 31.2V DC 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS
1794-IE4XOE2XT Inputs: 256 ms all channels 164 mA @ 10.5V DC 1794-TB2, -TB3, -TB3S, -TB3T, -TB3TS
1794-IE8XOE4 8 single-ended inputs/ outputs 4…20 mA (user configurable)
0…20 mA (user configurable)
Inputs: 8.0 ms all channels
Outputs: DAC
320 mV/cnt
0.641 mΑ/cnt
Current Input or Output: 0.1% Full Scale at 25 °C
Voltage Input or Output: 0.1% Full Scale at 25 °C⋆ 
Current or Voltage Input: 1.3 s (0.09 s with Quick Step) 140 mA at 24V DC; 280 mA at 10.0V DC 3.0 W at 31.2V DC; 2.3 W at 24V DC; 2.0 W at 10.0V DC 1794-TB3G or 1794-TB3GS
1794-IF2XOF2I 2 isolated inputs/2 outputs 4…20 mA
0…20 mA
±20 mA
±10V
0…10V
±5V
0…5V
Inputs: 2.5/5.0/7.5 ms all channels
Outputs: 2.5/5.0 ms
16 bits - unipolar; 15 bits plus sign - bipolar
0.156 mV/cnt unipolar; 0313 mV/cnt bipolar
0.320 mA/cnt unipolar; 0.640 mA/cnt bipolar
Current Terminal: 0.1% Full Scale at 25 °C
Voltage Terminal: 0.1% Full Scale at 25 °C
Current or Voltage Terminal:
1200 Hz conversion rate = 0.6 ms
600 Hz conversion rate = 6.7 ms
300 Hz conversion rate = 13.4 ms
150 Hz conversion rate = 26.7 ms
150 mA at 24V DC 3.3 W at 31.2V DC 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, and 1794-TBN
1794-IF2XOF2IXT Current Terminal: 0.1% Full Scale at 25 °C
Voltage Terminalt: 0.1% Full Scale at 25 °C
2.0 W at 31.2V DC 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, and 1794-TBN
♠ Catalog numbers ending in: (XT) = extreme environment.
⋆ Includes offset, gain, non-linearity, and repeatability error terms.

FLEX Analog Output Modules


Cat. No.♠  Number of Outputs Signal Range Output Conversion Rate Output Resolution Absolute Accuracy Step Response to 63% of FS, Output External DC Supply Current, Nom. Power Dissipation, Max. Terminal Base Unit
1794-OE4
1794-OE4K
4 single-ended outputs 4…20 mA
0…20 mA
±10V
0…10V
1.024 ms all channels 12 bits + sign
5.13 mA/Cnt
2.56 mV/Cnt
Current Output: 0.425% Full Scale at 25 °C
Voltage Output: 0.133% Full Scale at 25 °C
Voltage Output: 24 ms 70 mA at 24V DC⋆  4.5 W at 31.2V DC 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, 1794-TBN
1794-OE4XT 4 single-ended outputs 4…20 mA
0…20 mA
±10V
0…10V
12 bits + sign
0.156 mV/cnt
0.320 mΑ/cnt
Voltage terminal - 0.133% Full Scale at 25 °C
Current terminal - 0.425% Full Scale at 25 °C
24 ms 180 mA at 10.5V DC 4.5 W at 31.2V DC 1794-TB2, -TB3, -TB3S, -TB3T, -TB3TS, and -TBN
1794-OE12 12 single-ended outputs 4…20 mA
0…20 mA
320 mV/cnt
0.641 mΑ/cnt
Current Output: 0.1% Full Scale at 25 °C
Voltage Output: 0.1% Full Scale at 25 °C
~70% 1st convert; 96% 2nd convert; 100% 3rd convert 320 mA at 24V DC
720 mA at 10.0V DC
4.0 W at 31.2V DC; 4.3 W at 24V DC; 4.0 W at 10.0V DC 1794-TB3G or 1794-TB3GS
1794-OF4I 4 Isolated outputs 4…20 mA
0…20 mA
±10V
0…10V
±5V
0…5V
2.5/5.0 ms 15 bits + sign
0.656 mA/Cnt
0.320 mV/Cnt
Current Output: 0.1% Full Scale at 25 °C
Voltage Output: 0.1% Full Scale at 25 °C
Current or Voltage Output: < 25 ms 210 mA at 24V DC 4.7 W at 31.2V DC 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, 1794-TBN
1794-OF4IXT 2.0 W at 31.2V DC 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, and 1794-TBN
♠ Catalog numbers ending in (K) = Conformal Coated, (XT) = extreme environment.
⋆ Not including outputs.