Allen-Bradley 1734-IT2I POINT I/O Analog Temperature Input Module

Product Overview

Industrial temperature monitoring demands precision and reliability. The Allen-Bradley 1734-IT2I POINT I/O Analog Temperature Input Module delivers accurate thermocouple readings for critical processes. This module features 2 differential individually-isolated thermocouple inputs, ensuring signal integrity in electrically noisy environments. With a 15-bit resolution and 75 mV input voltage, it captures fine temperature variations essential for quality control.

Technical Specifications Breakdown

Key parameters for the 1734-IT2I are listed below for quick reference:

Industry Applications

Precision Temperature Monitoring in Chemical Processing

Chemical reactors require tight temperature control to maintain reaction rates and product quality. The 1734-IT2I’s dual thermocouple inputs allow redundant sensing or monitoring of two separate zones. Its 15-bit resolution detects small temperature shifts, preventing runaway reactions. The isolated inputs protect against ground loops common in plant environments.

Energy Management in HVAC Systems

Large commercial HVAC systems benefit from accurate temperature feedback to optimize energy use. This module’s 75 mV input range matches standard thermocouple outputs, enabling direct connection without signal conditioning. The signed integer data formats support Celsius, Fahrenheit, Kelvin, and Rankine scales, simplifying integration with building management systems.

Installation & Setup Guidance

Mount the 1734-IT2I only on a 1734-TBCJC wiring base assembly, as specified by the manufacturer. Ensure the key switch is set to position 6 before insertion to prevent incorrect module placement. Use shielded thermocouple extension wire to minimize noise. The module does not require an external DC power supply; it draws 175 milliamps from the POINTBus at 5 Volts DC. Verify that the bus current budget of your system can accommodate this draw.

Maintenance & Reliability

Inspect the module and wiring base periodically for signs of corrosion or loose connections, especially in high-humidity environments (5 to 95% non-condensing relative humidity). The open-style enclosure means the electronics are exposed; keep the enclosure clean and free of conductive debris. The module withstands operating vibration of 5 g at 10 to 500 Hertz and operating shock of 30 g, making it suitable for machinery with moderate vibration.

Compatibility & Integration

It produces eight bytes of scanner data and fault status data without consuming I/O data for transmission. Status indicators on the front panel show network status, module status, and input status for real-time diagnostics. The conversion type is Delta Sigma, providing stable readings.

Selection Guide & Purchasing Advice

When selecting a temperature input module, consider the number of channels, resolution, and isolation requirements. The 1734-IT2I suits applications needing two isolated thermocouple inputs with high resolution. Verify lifecycle status and availability with AutoDCSTech before ordering. AutoDCSTech stocks this module and can advise on compatible accessories.

Troubleshooting & Common Issues

If the module fails to communicate, check the POINTBus connection and key switch position. Under-range or over-range alarms indicate sensor faults or wiring issues. Cold junction compensation (CJC) open-wire detection helps identify broken thermocouple wires. Level alarms (low-low, low, high, high-high) can be configured to trigger preventive maintenance. For persistent problems, consult the module’s documentation or contact AutoDCSTech support.