Product Summary
The Allen-Bradley 1734-IT2I is a compact analog temperature input module for critical processes. It provides two individually isolated thermocouple inputs with 15-bit resolution. This module delivers high accuracy within a ±75 mV range. Engineers can trust this device for reliable temperature data acquisition in harsh environments.
Expert Technical Evaluation & Performance Review
This module delivers exceptional signal fidelity for demanding applications. Its 15-bit resolution provides precise temperature readings at 2.5 µV per count. The differential inputs reduce common-mode noise significantly. This design ensures accurate data in electrically noisy industrial settings.
The device leverages a Delta-Sigma conversion type for superior noise rejection. Engineers can select from four temperature scales, including Celsius and Fahrenheit. A custom mV scale offers additional flexibility for specialized sensors. This versatility makes the module suitable for diverse process control tasks.
The 1734-IT2I uses individual input isolation to protect signal integrity. This feature prevents ground loop interference between thermocouple channels. The module also includes comprehensive alarm functions. These alarms detect under-range, over-range, and cold junction faults quickly.
Operators benefit from real-time status indicators on the module face. These LEDs display network health and individual input status. The module consumes only 175 mA from the POINTbus. This low power draw reduces overall system heat generation and energy costs.
Deep-Dive Technical FAQ
Question 1: What thermocouple types work with this module?
This module supports various thermocouple types through its universal input design. The device reads raw mV signals from any standard sensor type. Users must set the correct scale within the software configuration. This flexibility allows integration with J, K, or T type probes.
Question 2: How does the module handle cold junction compensation?
The 1734-IT2I requires the 1734-TBCJC wiring base for proper operation. This base includes an integrated cold junction compensation sensor. The module uses CJC data to correct thermocouple measurements accurately. An alarm triggers immediately if the CJC circuit detects an open wire.
Question 3: Can I use this module in high-vibration environments?
Yes, the module withstands 5 g of operating vibration at 10 to 500 Hertz. It also tolerates 30 g of operating shock. The open-style enclosure has no moving parts that can fail. These specs make it reliable for machinery near motors or compressors.
Question 4: Does the module need an external power supply?
No, the 1734-IT2I draws all required power from the POINTbus backplane. The bus provides 5 Volts DC at 175 milliamps for full operation. This design simplifies wiring and reduces panel space requirements. It also eliminates the cost of an additional DC power supply.
Question 5: How do I configure the temperature scale and alarms?
Users configure these parameters through the controlling scanner or PLC software. The module uses signed integer data formats for all readings. You can set four distinct alarm levels for each channel. These levels include low-low, low, high, and high-high thresholds.
