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Allen-Bradley 1769-IT6 Compact I/O Thermocouple Input Module

Configured for thermocouple and millivolt signal acquisition in CompactLogix and MicroLogix platforms, the Allen-Bradley 1769-IT6 (1769-IT6 Thermocouple Input Module) provides direct electrical measurement processing for temperature and low-level voltage signals.

Hardware Specifications

Parameter	Specification
Model	1769-IT6
Brand	Allen-Bradley
Origin	USA
Product Type	Thermocouple / Millivolt Input Module
Product Line	CompactLogix Compact I/O
Weight	0.50 lbs (0.23 kg)
Power Consumption	1.5 W maximum heat dissipation
Input Channels	6 channels
Input Type	Thermocouple and millivolt input
Supported Thermocouple Types	J, K, T, E, R, N, S, B, C, CJC
Millivolt Input Range	+/- 50 mV and +/- 10 mV
Current Draw at 5.1 V	100 mA
Current Draw at 24 V	40 mA
Converter Type	Delta Sigma
Nonlinearity	+/- 0.03%
CJC Sensor Accuracy	+/- 0.3 deg C (+/- 0.54 deg F)
CJC Accuracy	+/- 1.0 deg C (+/- 1.8 deg F)
Calibration	Power-up calibration; programmable
Compatible Controllers	CompactLogix and MicroLogix
Compatible Adapters	1769-ADN DeviceNet, 1769-AENTR Ethernet
Power Supply Distance Rating	8 modules
Wire Type	Copper, 90 deg C
Wire Size	22-14 AWG solid wire
Replacement Terminal Block	1769-RTBN18
Replacement Door Label	1769-RL2 Series B

EtherNet/IP and Compact I/O Integration Features

The Allen-Bradley 1769-IT6 operates within the Compact I/O architecture and exchanges processed input data through the controller backplane interface. The module supports I/O density scaling by providing six dedicated temperature measurement channels in a compact hardware format.

Furthermore, the module supports CompactLogix and MicroLogix controller platforms through compatible communication adapters. The hardware configuration allows engineers to integrate thermocouple and millivolt devices into EtherNet/IP or DeviceNet based control networks when used with applicable adapter modules.

The Delta Sigma converter processes analog signals with programmable calibration functions. In addition, the cold junction compensation (CJC) function improves thermocouple measurement accuracy by monitoring reference junction temperature conditions.

Frequently Asked Questions

Q: What input signals can the 1769-IT6 process?
A: The 1769-IT6 processes thermocouple inputs including J, K, T, E, R, N, S, B, and C types. It also accepts +/- 50 mV and +/- 10 mV millivolt signals.

Q: Does the 1769-IT6 require external cold junction compensation hardware?
A: No. The module includes CJC sensor functionality and performs cold junction compensation through integrated measurement circuitry.

Q: Can the 1769-IT6 connect directly to Ethernet networks?
A: The module does not include an integrated Ethernet interface. It connects through compatible Compact I/O adapters such as the 1769-AENTR for Ethernet communication.

Field Installation Guidelines

Install the 1769-IT6 module on the CompactLogix or MicroLogix system assembly according to the controller platform installation requirements.

Use copper wiring with the specified temperature rating and wire size range. Keep thermocouple wiring separated from high-voltage power conductors to reduce electrical interference.

Connect thermocouple extension wiring with correct polarity and maintain consistent thermocouple material throughout the signal path. Ground cable shields according to the control panel grounding practice while avoiding unnecessary ground loops.

Verify module configuration parameters before operation, including sensor type selection, input range settings, and calibration requirements. Confirm that field devices match the configured thermocouple or millivolt input type before applying operating power.

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