Allen-Bradley 1734-IT2I 2-Ch Thermocouple Input Module

Product Overview

The Allen-Bradley 1734-IT2I is a Point I/O analog temperature input module. It provides two differential isolated thermocouple inputs. The module offers 15-bit resolution at 2.5 μV/cnt. It supports multiple temperature scales including Celsius, Fahrenheit, Kelvin, and Rankine. Its input voltage range is +/-75 mV. The module consumes 175 mA at 5V DC from the POINTBus. This module fits only the 1734-TBCJC wiring base assembly. Status indicators show network, module, and input statuses. The module uses signed integer data formats. It features alarms for under-range, over-range, and open-wire detection.

The 1734-IT2I produces eight bytes of scanner data. It also provides fault status data without consuming I/O data. No external DC power supply is necessary. The module has a compact size of 2.21 x 0.47 x 2.97 inches. It weighs only 0.08 pounds. The enclosure is open-style for heat dissipation. This module is part of the POINT I/O series by Rockwell Automation. It integrates seamlessly with ControlLogix and other systems.

Application Scenarios

This module is perfect for industrial temperature monitoring applications. Use it in process control systems needing precise thermocouple readings. It works well in harsh environments with operating temperature -20 to 55°C. The isolation protects against ground loops. Industries like oil and gas, chemical, and manufacturing benefit from its reliable performance. The module can handle both low and high temperature measurements. Its alarm features ensure safety in critical processes. The 1734-IT2I supports multiple temperature scales for global use. It is ideal for applications requiring high accuracy and isolation.

Technical Specifications

Manufacturer: Rockwell Automation. Brand: Allen-Bradley. Part Number: 1734-IT2I. Series: POINT I/O. Module Type: Analog Temperature Input Module. Key Switch Position: 6. Inputs: 2 Thermocouple. Resolution: 15 bits at 2.5 μV/cnt. Input Voltage: +/-75 mV. POINTBus Current: 175 mA at 5V DC. Data Formats: Signed integer. Temperature Scales: Celsius, Fahrenheit, Kelvin, Rankine, and mV custom scale. Conversion Type: Delta Sigma. Alarms: Under-range, over-range, cold junction compensation, open-wire, level (low-low, low, high, high-high). Impedance: 100 kΩ. Resistance: 1 MΩ. Power Dissipation: 1 W max. Thermal Dissipation: 3.3 BTU/hr. Continuous Isolation Voltage: 50 V. Operating Temperature: -20 to 55°C. Storage Temperature: -4 to 85°C. Relative Humidity: 5 to 95% non-condensing. Operating Vibration: 5 g at 10-500 Hz. Operating Shock: 30 g. Non-operating Shock: 50 g. Enclosure: Open-style. Dimensions: 2.21 x 0.47 x 2.97 inches. Weight: 0.08 lbs (0.036 kg). The module operates at 24V DC system voltage. It has signed integer data formats for all scales. The conversion type is Delta Sigma for high accuracy.

Installation & Maintenance Guide

Install the 1734-IT2I only on a 1734-TBCJC wiring base. Ensure system power is off before installation. Mount the module by sliding it onto the base until it clicks. Secure the locking tab. Connect thermocouple wires per the wiring diagram. Standard signals are +/-75 mV. Avoid exceeding isolation voltage of 50V. Regular maintenance includes checking for loose wires. Clean the module with a dry cloth. Replace if status indicators show faults. Operating conditions should remain within specified ranges. Only use Fedex, UPS, or DHL for shipping replacement units. The module does not require external DC power. Follow Rockwell documentation for detailed wiring and configuration.

Packing List

Each unit includes one 1734-IT2I module only. No wiring base or accessories are included. The module is packed in anti-static packaging. A quick reference guide may be included. For full documentation, visit the Rockwell website. We recommend storing the module in a dry environment. Handle with care to avoid electrostatic discharge.