1734-IR2 2-Channel RTD Input Module 16-Bit | Allen-Bradley

The Original New Allen-Bradley 1734-IR2 2-Channel RTD Input Module is a POINT I/O temperature sensing device designed for precise resistance temperature detector (RTD) signal acquisition in distributed industrial automation systems. Featuring two single-ended, non-isolated input channels, this module supports a wide range of RTD types (Pt, Ni, Cu) and direct resistance measurement up to 600 Ω with 16-bit resolution. Factory-calibrated and fully compatible with POINT I/O communication adapters and Rockwell Automation controllers, it delivers reliable temperature measurement for process monitoring and machine control applications. 

Core Engineering Highlights:
2-channel RTD / resistance input | 16-bit resolution (0.03 °C/cnt for Pt385) | 0–600 Ω input range | 0.1% accuracy @ 25°C | 120 dB common mode rejection | 50V isolation (type tested 1600V AC) | 1.0W power dissipation | Keyswitch position 6 | -20°C to +55°C operating temperature 

Key Features:

• Original New Allen-Bradley 1734-IR2 module

• 2 single-ended, non-isolated RTD / resistance input channels 

• Supports multiple RTD types: 100/200 Ω Pt (α = 0.00385 & 0.003916), 10 Ω Cu, 100/120 Ω Ni 

• Direct resistance measurement: 0–600 Ω 

• 16-bit resolution – 9.5 mΩ/cnt; 0.03 °C/cnt (Pt385 @ 25 °C) 

• 0.1% absolute accuracy @ 25°C full scale

• 120 dB common mode rejection ratio 

• Factory calibrated – no field calibration required

• Channel-level diagnostics: overrange, underrange, open-wire detection 

• Keyswitch position: 6 

• Removable Terminal Block (RTB) compatible with 1734-TB, 1734-TBS, 1734-TOP, 1734-TOPS 

• DIN rail mounting, open-style enclosure (IP20) 

• Compact 12 mm width for space-constrained panels 

• Removal and Insertion Under Power (RIUP) support 

• Conformal coated version available for harsh environments (1734-IR2K) 

Applications:

• Temperature monitoring with Pt100, Pt200, Ni100, Ni120, Cu10 RTD sensors 

• Industrial process control and data logging

• HVAC system temperature measurement

• Packaging machinery thermal monitoring

• OEM equipment requiring distributed temperature I/O

• Machine condition monitoring (bearing temperature, motor winding)

• Direct resistance measurement applications (0–600 Ω)

Technical Specifications:

• Catalog Number: 1734-IR2

• Product Family: POINT I/O

• Product Type: RTD / Resistance Input Module 

• Lifecycle Status: Active 

• Inputs: 2 (single-ended, non-isolated) 

• Input Types: RTD (Pt, Ni, Cu) / Resistance (0–600 Ω) 

• Supported RTD Sensors: 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; 120 Ni α=0.00672 

• Resolution: 16 bits – 9.5 mΩ/cnt; 0.03 °C/cnt (Pt385 @ 25 °C) 

• Input Range: 0–600 Ω 

• Accuracy: 0.1% @ 25°C full scale

• Common Mode Rejection Ratio: 120 dB 

• Isolation Voltage: 50V continuous, Basic Insulation Type; type tested at 1600V AC for 60s 

• Keyswitch Position: 6 

• Terminal Base Compatibility: 1734-TB, 1734-TBS, 1734-TOP, 1734-TOPS 

• Power Supply: 24V DC 

• POINTBus Current: 75 mA @ 5V DC

• Power Dissipation: 1.0 W @ 28.8V DC 

• Dimensions (HxWxD): 56 x 12 x 75.5 mm (2.2 x 0.47 x 2.97 in.) 

• Weight: Approx. 0.04 kg (0.06 lbs) 

• Enclosure Type: Open-style (IP20) 

• Mounting: DIN Rail 

• Operating Temperature: –20°C to +55°C 

• Storage Temperature: –40°C to +85°C

• Max. Ambient Humidity (non-condensing): 95%

• Pollution Degree: 2 industrial environment 

• Altitude: Up to 2000 m (6562 ft) without derating

• Certifications: CE, cULus, KC, RCM, UL, CCC, IECEx, ATEX, UKCA, Registro Italiano Navale 

• UPC: 612598269167 

• Country of Origin: Singapore 

System Compatibility:

• Rockwell Automation POINT I/O communication adapters (1734-AENT, 1734-AENTR)

• POINT I/O backplane systems

• ControlLogix, CompactLogix, and GuardLogix controllers

• EtherNet/IP, ControlNet, and DeviceNet networks

• 1734-TB / 1734-TBS / 1734-TOP / 1734-TOPS terminal base assemblies

• Studio 5000 Logix Designer® application with Add-on Profiles 

Related Products:

• 1734-IR2K – Conformal coated version for harsh environments 

• 1734-IR2E – Enhanced RTD input module with additional features 

• 1734-IT2I – 2-channel thermocouple input module (alternative temperature input)

• 1734-AENTR – EtherNet/IP adapter for distributed POINT I/O systems

• 1734-TB – Terminal base for field wiring (screw type, 8-pin)

• 1734-TBS – Terminal base for field wiring (spring clamp, 8-pin)

• 1734-TOP – One-piece mounting base (screw type, 8-pin)

• 1734-TOPS – One-piece mounting base (spring clamp, 8-pin)

• 1734-IB8 – 8-channel digital input module

• 1734-OB8 – 8-channel digital output module

PLC ERA is an independent industrial automation distributor supplying 100% genuine Original New products through established global supply channels. Allen-Bradley and POINT I/O are trademarks of Rockwell Automation.