Product Summary
The 1734-IR2 is a Resistance Temperature Detector (RTD) input module from Rockwell Automation’s POINT I/O family. It delivers two single‑ended, non‑isolated channels with 16‑bit resolution. This module supports multiple RTD types, including Pt100 and Ni100, plus direct 0‑600Ω resistance inputs. Engineers rely on it for precise temperature monitoring in demanding industrial environments.
Theme A: Procurement & Buyer Guide – Why the 1734‑IR2 Fits Your System
Selecting the correct RTD module requires matching sensor types and channel count to your application. The 1734-IR2 accepts 100 Pt α=0.00385, 200 Pt α=0.00385, 100 Pt α=0.003916, 200 Pt α=0.003916, 10 Cu α=0.00427, 100 Ni α=0.00618, 120 Ni α=0.00618, and 120 Ni α=0.00672 sensors. This wide compatibility reduces inventory complexity and simplifies system design.
Procurement managers benefit from the module’s power efficiency. It draws only 220 mA at 5V DC and dissipates 1.0 W at 28.8V DC. With a thermal dissipation of 3.3 BTU/hour, the 1734‑IR2 adds minimal heat to your cabinet. This helps maintain stable ambient temperatures and extends component life.
The module’s compact footprint (56 x 12 x 75.5 mm) fits tightly in distributed I/O racks. It mounts on standard POINT I/O bases such as 1734‑TB, 1734‑TBS, 1734‑TOP, or 1734‑TOPS. This interchangeability streamlines procurement because you can reuse existing backplanes and terminal assemblies.
For application engineers, the 1734‑IR2 offers 16‑bit resolution with 9.5 mΩ/cnt and 0.03 °C/cnt (Pt385 at 25 °C). Absolute accuracy is 0.1% Full Scale at 25 °C. This high precision enables reliable temperature control in processes like plastic extrusion, chemical reactors, and HVAC systems.
The module also supports direct wiring of 0‑600 Ω analog signals. If you need to measure resistive sensors beyond standard RTDs, the 1734‑IR2 handles them without extra signal conditioners. This flexibility reduces overall system cost and installation time.
Theme D: Expert Technical Evaluation – Accuracy, Response, and Environmental Tolerance
From an engineering standpoint, the 1734‑IR2 uses a Delta‑Sigma conversion type with signed integer data format. This architecture provides excellent noise rejection and linearity. The module’s input step response varies from 60 ms at 50 Hz notch to just 6 ms at 480 Hz notch. This allows you to tune the filter for your electrical environment.
The default input update rate is 33 ms per module (notch = 60 Hz). You can select faster or slower rates depending on required noise suppression. At 480 Hz notch, the update rate drops to 4 ms per module, making the module suitable for high‑speed temperature loops.
Isolation voltage is 50 V continuous between channels and system ground. While not fully isolated, this rating is adequate for typical industrial temperature sensing where sensors share a common reference. The open‑style enclosure (no IP rating) requires installation inside a protective cabinet.
Operating temperature range is ‑20 to 55 °C. This covers most indoor industrial environments. Weight is only 0.08 pounds (36 grams), which simplifies handling during installation and maintenance. The keyswitch position is set to 6 for correct addressing.
When evaluating longevity, note the module dissipates only 3.3 BTU/hour. This low thermal output reduces heat‑related stress on nearby components. Combined with the robust Rockwell Automation design, the 1734‑IR2 delivers reliable service in continuous operation.
