Product Summary
The Allen-Bradley 1734-IR2E is a POINT I/O analog temperature input module with two high-resolution RTD inputs. It delivers 16-bit signed integer data format and requires no external DC supply, simplifying integration.
Theme A: Product Procurement & Buyer Guide
Why Choose the 1734-IR2E for Your System?
Procurement managers value the 1734-IR2E for its ultra-compact footprint. It measures only 2.21 x 0.47 x 2.97 inches and weighs 0.08 pounds. This module easily mounts on a DIN rail to compatible terminal bases like 1734-TB or 1734-TOP. Its open enclosure keeps installation simple.
Critical Technical Specifications for Engineers
The 1734-IR2E features an input resolution of 16 bits with a step response between 6 and 60 milliseconds. Engineers appreciate the 0.1% full-scale accuracy at 25°C and the 30 ppm/°C drift. This module supports multiple temperature scales: Celsius, Fahrenheit, Kelvin, Rankine, or custom mV.
Wiring and Compatibility Requirements
You must use 22 to 14 AWG shielded thermocouple wire with this module. The 1734-IR2E provides alarms for over-range, under-range, high/low level, and open wire conditions. Its common mode rejection ratio is 120 dB, and normal mode rejection is 100 dB.
How It Solves Common Industrial Pain Points
This module eliminates the need for an external DC power supply, reducing cabinet wiring complexity. The two single-ended, non-isolated RTD inputs offer high-resolution temperature sensing without consuming extra I/O data. Operators can monitor network and module status through real-time indicators.
Making the Right Purchase Decision
When sourcing the 1734-IR2E, verify the keyswitch position is 6. The module dissipates only 1 watt (3.3 BTU/hour), supporting dense I/O layouts. Its operating temperature range of -20 to 55°C suits most factory environments.
Theme D: Expert Technical Evaluation & Performance Review
Precision and Resolution Analysis
The 1734-IR2E uses a 16-bit analog-to-digital converter that provides 2.4 milliohms/cnt and 0.006°C/cnt resolution. This precision enables accurate temperature control in processes like oven monitoring or reactor profiling. The signed integer data format simplifies PLC programming.
Signal Integrity and Noise Rejection
With 120 dB CMRR and 100 dB NMRR, the 1734-IR2E rejects common-mode and normal-mode noise effectively. This performance ensures stable readings even in electrically noisy plants. The module also isolates up to 50 volts continuously.
Environmental and Thermal Performance
The module’s thermal dissipation is only 3.3 BTU/hour, which minimizes heat buildup in enclosures. Accuracy drift of 30 ppm/°C keeps measurements reliable across temperature shifts. The open enclosure allows passive cooling without fans.
Calibration and Alarming Capabilities
Users can select from four predefined temperature scales or a custom mV scale. The module generates up to 6 bytes of fault status data without using I/O memory. Alarms for over-range, under-range, and open wire conditions protect sensitive processes.
Comparative Advantage Over Alternatives
Compared to lower-resolution analog input modules, the 1734-IR2E offers superior temperature measurement granularity. Its compact design and no-external-power requirement reduces total cost of ownership. This module is a direct fit for Rockwell’s POINT I/O architecture.
