Product Overview

The Allen-Bradley 1769-IT6 is a thermocouple and millivolt input module. This module belongs to the 1769 Compact I/O series. It features six input channels for temperature measurement. The module accepts signals from many thermocouple types. You can also use it for +/-50mV and +/-10mV millivolt signals.

Technical Specifications

The Allen-Bradley 1769-IT6 has six input channels plus 2 CJC sensors. It uses a Delta Sigma converter type. Current draw is 100 mA at 5.1V. Current draw at 24V is 40 mA. Maximum heat dissipation is 1.5W.

Key technical parameters include:

• Nonlinearity: ±0.03%

• CJC sensor accuracy: ±0.3°C (±0.54°F)

• CJC accuracy: ±1.0°C (±1.8°F)

• Power Supply Distance Rating: 8 modules

• Input Impedance: Less than 10 millivolts

• Working Voltage: 30V AC or 30V DC

The module performs auto-calibration at power-up. You can also program it to run every five minutes.

Supported Thermocouple Types

The 1769-IT6 supports many thermocouple sensor types. Each type has a specific temperature measurement range.

Temperature ranges by type:

• Type J: -210°C to +1200°C

• Type K: -270°C to +1370°C

• Type T: -270°C to +400°C

• Type E: -270°C to +1000°C

• Type R: 0°C to +1768°C

• Type S: 0°C to +1768°C

• Type B: +300°C to +1820°C

• Type N: 210°C to +1300°C

• Type C: 0°C to +2315°C

The module also supports CJC (Cold Junction Compensation) sensors. This ensures accurate temperature readings.

Millivolt Input Specifications

The Allen-Bradley 1769-IT6 accepts millivolt signals as well. Supported ranges include +/-50mV and +/-10mV. The operating range is -50 to +50mV and -10 to +10mV.

Millivolt inputs suit transducer interface applications. These include pressure, load cell, and flow sensors. The module provides the same accuracy for mV signals as for thermocouples.

Input Filters and Detection

The 1769-IT6 includes selectable input filters. These filters stabilize measurements in noisy environments.

Selectable filter frequencies:

• 10 Hz

• 50 Hz

• 60 Hz

• 250 Hz

• 500 Hz

• 1 kHz

The module also provides diagnostic features. It detects open circuit, short-circuit, over-range, and under-range conditions. Open-circuit detection time ranges from 7 milliseconds to 2.1 seconds.

Data Format Options

Each analog input on the 1769-IT6 can be configured for different data formats. You can choose the format that best suits your application.

Available data formats include:

• Engineering units for direct temperature reading

• Scaled for PID for closed-loop control

• Raw/Proportional Data for custom scaling

The module communicates with the controller via the bus interface. It receives power from the 5-24V DC system power supply.

Rejection Ratios

The 1769-IT6 provides excellent noise rejection. Common mode rejection rating is 115 decibels. Normal mode rejection ratio is 85 decibels at 50 to 60 Hertz.

These rejection ratios ensure accurate measurements. They filter out electrical noise from AC power lines. This is critical for precise temperature control applications.

Compatible Adapters and Accessories

The 1769-IT6 works with several 1769 adapters. These connect the module to different networks.

Compatible adapters include:

• 1769-ADN (DeviceNet network)

• 1769-AENTR (Ethernet network)

Replacement parts include:

• Replacement Door Label: 1769-RL2 series B

• Replacement Terminal Block: 1769-RTBN18

The recommended wire type is Copper rated for 90°C. Wire size for solid conductors is 22-14 AWG.

Installation Guidelines

Follow these steps for proper installation:

1. Mount the 1769-IT6 at least two slots away from AC power supplies.

2. Maintain 2 inches of clearance on all sides for ventilation.

3. Use Belden 8761 shielded cable for millivolt inputs.

4. Connect thermocouple wires observing proper polarity.

5. Configure input filters based on your noise environment.

6. Enable auto-calibration for ongoing accuracy.

Do not exceed the power supply distance rating of 8 modules. Use copper wire rated for 90°C. Keep the module within 0°C to 60°C operating temperature.

Package Contents

The box includes the following items:

• Allen-Bradley 1769-IT6 thermocouple/mV input module

• Removable terminal block (1769-RTBN18)

• Door label (1769-RL2 series B)

• Installation instructions manual

• CJC sensor (pre-installed)

Common FAQs

Q1: What thermocouple types does the 1769-IT6 support?
A: The 1769-IT6 supports J, K, T, E, R, S, B, N, and C thermocouple types. It also includes CJC sensors for cold junction compensation.

Q2: What is the power supply distance rating for this module?
A: The power supply distance rating is 8 modules. Do not mount the 1769-IT6 more than eight slots away from the power supply.

Q3: What millivolt ranges does this module accept?
A: The 1769-IT6 accepts +/-50mV and +/-10mV signals. The operating ranges are -50 to +50mV and -10 to +10mV.

Q4: Does the 1769-IT6 perform auto-calibration?
A: Yes, the 1769-IT6 performs auto-calibration at power-up. You can also program it to run every five minutes for ongoing accuracy.

Q5: What cable does the manufacturer recommend for millivolt inputs?
A: The manufacturer recommends Belden 8761 shielded cable for millivolt inputs on the 1769-IT6.

Dimensions and Environment

The product has these physical specifications:

• Module Height: 118 mm (4.65 inches)

• Module Width: 87 mm (3.43 inches)

• Module Depth: 35 mm (1.38 inches)

• Module Weight: 276 g (0.61 lbs)

• Shipping Weight: 2 lbs (0.91 kg)

• Shipping Dimensions: 8 x 8 x 5 inches

• Operating Temperature: 0°C to 60°C

• Storage Temperature: -40°C to 85°C

• Operating Shock: 30g for 11 ms

• Non-operating Shock (panel): 40g

• Converter Type: Delta Sigma

• UPC: 10611320314424

The Allen-Bradley 1769-IT6 thermocouple input module delivers precise temperature measurement. Its six channels support many thermocouple types for CompactLogix systems. Order the 1769-IT6 for your next temperature monitoring application.