Allen Bradley 1762-IT4 MicroLogix 1200 Thermocouple/mV 4-Channel Input Module

Product Description

The Allen Bradley 1762-IT4 is a thermocouple and millivolt input module designed for the MicroLogix 1200 platform. It provides four input channels plus one cold junction compensation (CJC) sensor, supporting a wide range of thermocouple types and millivolt signals. With delta-sigma conversion, programmable notch filtering, and automatic calibration, this module ensures accurate and stable temperature measurement in industrial applications.

Technical Specifications

• Manufacturer: Allen Bradley

• Part Number: 1762-IT4

• Product Line: MicroLogix 1200

• Product Type: Thermocouple/mV Input Module

• Weight: 0.25 lbs (≈ 0.11 kg)

• Number of Inputs: 4 channels + 1 CJC sensor

• Supported Thermocouple Types: J, K, T, E, R, S, B, N, C

• Supported Millivolt Signals: ±50 mV, ±100 mV

• Converter Type: Delta-Sigma

• Resolution: 15-bit plus sign

• Filter Frequencies: 10 Hz, 50 Hz, 60 Hz, 250 Hz, 500 Hz, 1 kHz

• Channel Update Times: 303 ms, 63 ms, 53 ms, 15 ms, 9 ms, 7 ms (depending on filter setting)

• Calibration: Automatic at power-up, programmable calibration supported

• CJC Sensor Accuracy: ±1.3 °C (±2.54 °F)

• Current Draw @ 5.1 VDC: 40 mA

• Current Draw @ 24 VDC: 50 mA

• Heat Dissipation: 1.5 W max

• Mounting: DIN rail

• Enclosure: Open-type

• Operating Temperature: 0–55 °C (32–131 °F)

• Storage Temperature: -40–85 °C (-40–185 °F)

• Vibration Resistance: 5 g @ 10–500 Hz

• Shock Resistance: 30 g

Application Scenarios

The 1762-IT4 is ideal for process control systems requiring precise temperature monitoring, such as furnaces, kilns, and industrial ovens. Its compatibility with multiple thermocouple types makes it versatile for diverse applications.

Comparison with Similar Modules

• 1762-IT4: 4-channel thermocouple/mV input, CJC sensor included, delta-sigma conversion.

• Other MicroLogix input modules: May support analog voltage/current inputs but lack dedicated thermocouple compatibility.

FAQ

Q: Does the 1762-IT4 support millivolt signals in addition to thermocouples?  A: Yes, it supports ±50 mV and ±100 mV ranges.

Q: How accurate is the CJC sensor?  A: The cold junction compensation sensor has an accuracy of ±1.3 °C (±2.54 °F).