Allen Bradley 1794-IR8 RTD Input Module

Product Description

The 1794-IR8 RTD Input Module from Allen-Bradley is a precision-engineered solution for distributed I/O systems within the FLEX I/O family. Designed for accurate temperature monitoring, this 8-channel module supports multiple RTD sensor types and ensures reliable performance in demanding industrial automation environments.

Technical Specifications

• Model Number / Order Code: 1794-IR8

• Type: RTD Input Module

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Condition: Brand New

• System Compatibility: PLC (Programmable Logic Controller)

• Product Range: FLEX I/O System

• Weight: 0.15 kg

• Dimensions: 6.2 × 5.2 × 9.7 cm

• HS Code: 8537101190

• Origin: USA

• MOQ: 1 unit

• Lifecycle Status: Discontinued (June 30, 2016)

• Lead Time: In stock (legacy support availability)

• Channels: 8 RTD input channels

• Input Range: 1–433 Ω

• Resolution: 16-bit

• Accuracy: ±0.05% full scale (normal mode), ±0.01% (enhanced mode)

• Noise Rejection: -60 dB at 60 Hz

• Isolation Protection: 707 VDC

• Supported RTD Standards: 100 Ω Pt385 Euro (-200 to +870°C), 100 Ω Pt3916 U.S. (-200 to +630°C), nickel, copper

• Excitation Current: 718.36 μA

• Channel Bandwidth: 0–2.62 Hz

• System Throughput: 28 ms (8 channels, normal mode), 650 ms per channel (enhanced mode)

• Power Dissipation: 3 W at 31.2 VDC

• Thermal Dissipation: 10.2 BTU/hr

• Operating Temperature Range: -20°C to +100°C compensation range

• Protection: Overvoltage protection (35 VDC / 25 VAC continuous)

Key Features

• High-accuracy RTD measurement with 16-bit resolution

• Flexible support for platinum, nickel, and copper RTDs

• Strong noise rejection and isolation for reliable operation in noisy environments

• Programmable throughput for optimized performance

• Compact design for seamless integration into FLEX I/O systems

• Rugged construction with overvoltage protection for industrial reliability

Application Scenarios

• Chemical processing plants requiring precise temperature monitoring

• Power generation systems with critical thermal control needs

• Manufacturing environments needing robust RTD input modules

• Legacy FLEX I/O installations requiring continued support and replacement parts

FAQ

Q: What RTD types are supported by the 1794-IR8? A: Platinum, nickel, and copper RTDs, including Pt385 Euro and Pt3916 U.S. standards.

Q: Is the module still in production? A: No, it was discontinued on June 30, 2016, but remains available as legacy stock.

Q: How accurate is the module? A: It provides ±0.05% accuracy in normal mode and ±0.01% in enhanced mode.