1756-IT6I2 Allen Bradley Rockwell Enhanced Isolated Thermocouple Input Module

Product parameters

Product Model: 1756-IT6I2

Type: Enhanced Isolated Thermocouple/Millivolt input Module (Analog Input)

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Six independent isolated thermocouple/millivolt input channels

Two cold contact compensation (CJC) sensors (provided with the module)

Supported thermocouple types:

B, C, D, E, J, K, N, R, S, T, L (TXK/XK)

Linearization standard: ITS-90

Input impedance: >10 MΩ

Power dissipation: Maximum 4.6W

Heat dissipation: 15.7 BTU/hr

Conversion method: Sigma-Delta

Data format: Integer mode (left-aligned, 2's complement) or IEEE 32-bit floating-point mode

Channel bandwidth: 15 Hz (-3 dB)

Isolation voltage:

Channel-to-channel: 250V (continuous), basic insulation, test voltage 1350V AC, lasting for 2 seconds

Channel to backplane: 250V (continuous), enhanced insulation, test voltage 1350V AC, lasting for 2 seconds

Cold Contact Compensation (CJC) :

Two CJC sensors (provided with the module, part number 1756-CJC)

CJC accuracy: ±0.3°C (local and remote CJC)

Accuracy:

Thermocouple: ±0.3... 3.2°C (Depending on the type of thermocouple and channel)

Millivolts: better than 0.1% full scale

Overvoltage protection: Up to 120V AC/DC

Open-circuit detection time: 2 seconds (full scale reading)

Noise suppression

Normal mode: 60 dB @ 60 Hz

Common mode: Minimum 160 dB @ 600V AC (100 Ω differential resistor)

Wire size:

1756-TBNH: 0.33-2.1 mm² (22-14 AWG, single line), 0.33-1.3 mm² (22-16 AWG, Double line)

1756-TBSH: 0.33-1.3 mm² (22-16 AWG, single line)

Connector: 20-pin removable terminal block (RTB, only 1756-TBNH)

Operating temperature range: 0-60°C (32-140°F)

Storage temperature range: -40 to 85°C (-40 to 185°F)

Working humidity: 5-95% (no condensation)

Impact rating: 30G

Vibration level: 2G @ 10-500 Hz

Installation method: Install on ControlLogix racks (compatible with 1756-A4, A7, A10, A13, A17)

Certifications: CE, CSA, UL, FM, IECEx, ATEX, RCM, KC, EAC (as of March 2025)

Temperature code: T4 (North American and ATEX standards)

Shell type: Open Enclosure

UPC: 10612598172310

Function

High-precision thermocouple measurement

Supports multiple types of thermocouples (B, C, D, E, J, K, N, R, S, T, L), and is suitable for measurement over a wide temperature range.

Support millivolt input (-12...) 78 mV, -12... It is 30 mV and can be used in non-temperature-related applications.

16-bit resolution (1.4 µV/bit or 0.7 µV/bit) ensures high-precision measurement.

Channel isolation

Six channels are independently isolated (channel-to-channel, channel-to-backplane, 250V), effectively reducing ground loops and electromagnetic noise interference.

Cold contact compensation

It includes 2 CJC sensors (provided with the module), with an accuracy of ±0.3°C, supporting both local and remote CJC to ensure the accuracy of thermocouple measurement.

Advanced diagnostic functions:

Supports open circuit detection (reporting positive full scale readings within 2 seconds), over-range/under-range detection, process alarm, rate alarm and disconnection detection.

It provides 10 Ω offset compensation to optimize the measurement accuracy in the low range.

Data processing

Supports integer mode (millivolts) and floating-point mode (millivolts or temperature). The floating-point mode offers digital filtering, temperature linearization (Celsius/Fahrenheit), and alarm functions.

Built-in notch filtering (10 Hz, 50 Hz, 60 Hz, 100 Hz, 250 Hz, 1000 Hz) optimizes noise suppression.

Supports real-time sampling and timestamp, suitable for sequential event (SOE) applications.

Network integration

Communicate with the ControlLogix controller via ControlNet or EtherNet/IP network, supporting local or distributed I/O architecture.

Supports hot plugging (RIUP), which is convenient for maintenance and replacement.

Software configuration:

Configured using Studio 5000 software, it supports independent setting of thermocouple types, input ranges, filtering and alarm parameters for each channel.

Support Add-On Profiles (AOP) for simplified configuration.

Application scenarios

Process control

In the petrochemical, oil refining, pharmaceutical or food processing industries, key temperature parameters such as the temperature of reactors, pipelines or storage tanks are monitored.

Channel isolation and high noise suppression capabilities are suitable for complex electromagnetic environments.

Industrial Automation

It is used for temperature monitoring in manufacturing industries, such as heat treatment furnaces, injection molding machines or metal processing equipment.

Supports multiple types of thermocouples to meet the requirements of different temperature ranges.

Data Acquisition System

In laboratories or test platforms, high-precision temperature or millivolt data can be collected, which is suitable for scientific research or quality control.

The real-time sampling and timestamp functions support dynamic testing and SOE applications.

Distributed control system: Through ControlNet or EtherNet/IP networks, it serves as a remote I/O component and is integrated into large-scale factory automation systems, suitable for cross-regional temperature monitoring.

High-reliability scenarios: Channel isolation and CJC compensation make it suitable for temperature monitoring in power systems, aerospace, or critical infrastructure.

Advantage Products:

All items are Distributor Ready-stock Genuine Brand-new Supplying, please inform us if the other conditions are needed, Used, Open-box, Refurbished, etc.

Many Available just wait for you, feel free to ask to get better deal!!!

Bou L(Sales Manager)            

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