Rockwell Automation 1756-XXXX ControlLogix Analog I/O Modules - Manual (Page 128)

128 Publication 1756-UM009C-EN-P - December 2010
Chapter 6 Temperature-measuring Analog Modules (1756-IR6I, 1756-IT6I, and 1756-IT6I2)
Sensor Type
Three analog modules, the RTD (1756-IR6I) and Thermocouple (1756-IT6I
and 1756-IT6I2), lets you configure a sensor type for each channel that
linearizes the analog signal into a temperature value. The RTD module
linearizes ohms into temperature and the Thermocouple modules linearize
millivolts into temperature.
The table lists the sensors that are available for your application.
1756-IT6I or
1756-IT6I2 Module in
Temperature
Applications
A wire is disconnected from the module.
• Input data for the channel changes to the highest scaled
temperature value associated with the selected
thermocouple type.
• The ChxOverrange (x=channel number) tag is set to 1.
1756-IT6I Module or
1756-IT6I2 in Millivolt
Applications • Input data for the channel changes to the scaled value
associated with the overrange signal value of the selected
operational range in floating point mode (maximum
possible scaled value) or 32,767 counts in integer mode.
• The ChxOverrange (x=channel number) tag is set to 1.
Wire Off Conditions
In this application The following causes a wire off condition And if the wire off condition is detected, this occurs
IMPORTANT
Sensor type modules can only linearize signals to temperature
values in the floating point mode.
Available Sensors for Temperature Measuring Modules
Module Available sensors or thermocouples
1756-IR6I 10
Ω
- Copper 427 type.
100
Ω
- Platinum 385, Platinum 3916, and Nickel 618 types.
120
Ω
- Nickel 618 and Nickel 672 types.
200
Ω
- Platinum 385, Platinum 3916, and Nickel 618 types.
500
Ω
- Platinum 385, Platinum 3916, and Nickel 618 types.
1000
Ω
- Platinum 385 and Platinum 3916 types.
1756-IT6I B, E, J, K, R, S, T, N, C.
1756-IT6I2 B, E, J, K, R, S, T, N, C, D, TXK/XK (L).