Rockwell Automation 1734-IT2I Thermocouple and RTD Input Module User Manual User Manual

Page 14

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Publication 1734-UM004F-EN-E - December 2012

4 About POINT I/O Modules

Data Format (1734-IT2I, 1734-IR2, and 1734-IR2E modules)

You must choose a module data format in your user program. Select the
format. These are four predefined scales and one custom scale.

°C, F, °R, and °K returns data in tenths of a degree (250 implies 25.0 °).

For the 1734-IR2E,

C,

F,

R, and

K returns data in hundreths of a degree

(250 implies 2.50

). If scaling is set to 10,000 and 20,000, the module returns

hundredths of an ohm (12345 implies 123.45).

For the 1734-IR2, if using ohms, the default data returned is in tenths of ohms
(1234 implies 123.4

Ω

).

For the 1734-IT2, if using mV, the default data is returned in hundredths of a
mV, or tens of a

μ

V (3500 implies 35.00

).

If the input scale is custom scale, you can specify scaling points as shown in
the table.

Data Formats

mV

Custom Scale

C

Celsius

Predefined Scale

F

Fahrenheit

K

Kelvin

R

Rankine

1734-IT2I Thermocouple Input Module

1734-IR2 RTD Input Module

Thermocouple
Type

Low Scaling
Endpoint

High Scaling
Endpoint

RTD Type

Low Scaling
Endpoint

High Scaling
Endpoint

mV

0 mV

70mV

Ohms

100

Ω

500

Ω

Type B

212 °F (100 °C)

1832 °F (1000 °C)

100

Ω

Pt

α =

0.00385 Euro

32 °F (0 °C)

932 °F (500 °C)

Type C

32 °F (0 °C)

4199 °F (2315 °C)

200

Ω

Pt

α =

0.00385 Euro

32 °F (0 °C)

932 °F (500 °C)

Type E

32 °F (0 °C)

1832 °F (1000 °C)

100

Ω

Pt

α =

0.003916 U.S.

32 °F (0 °C)

932 °F (500 °C)

Type J

32 °F (0 °C)

1832 °F (1000 °C)

200

Ω

Pt

α =

0.003916 U.S.

32 °F (0 °C)

932 °F (500 °C)

Type K

32 °F (0 °C)

1832 °F (1000 °C)

10

Ω

Cu

α =

0.00427

32 °F (0 °C)

482 °F (250 °C)

Type N

32 °F (0 °C)

1832 °F (1000 °C)

100

Ω

Ni

α =

0.00618

32 °F (0 °C)

482 °F (250 °C)

Type R

32 °F (0 °C)

1832 °F (1000 °C)

120

Ω

Ni

α =

0.00672

32 °F (0 °C)

482 °F (250 °C)

Type S

32 °F (0 °C)

1832 °F (1000 °C)

120

Ω

Ni

α =

0.00618

32 °F (0 °C)

482 °F (250 °C)

Type T

32 °F (0 °C)

212 °F (100 °C)

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