Allen Bradley 1794-IRT8 Temperature Input Module

The AB 1794-IRT8 is a high-density temperature input module from the FLEX I/O family, designed to measure both thermocouple and RTD signals in industrial automation systems. Supporting up to eight input channels, the module accepts a wide range of temperature sensors including platinum, nickel, and copper RTDs, as well as thermocouples of types B, C, E, J, K, N, R, S, and T.

With 16-bit resolution and channel-to-channel isolation, the 1794-IRT8 ensures high accuracy and noise immunity, making it ideal for process monitoring, temperature control, and distributed measurement systems in space-constrained control panels.

Technical Specifications

Model: 1794IRT8
Series: FLEX I/O
Type: Temperature Input Module
Input Channels: 8 analog inputs
Supported Sensor Types:
• RTDs: Pt100, Pt1000, Ni100, Cu10, Cu53
• Thermocouples: B, C, E, J, K, N, R, S, T

Resolution: 16-bit
Terminal Base Compatibility: TB3G, TB3GS
Application: Precision temperature measurement in distributed control systems

Electrical Specifications

Input Signal Types:
• Resistance (RTD)
• Millivolt (Thermocouple)
• Voltage (±100 mV typical)

Accuracy: ±0.5°C to ±2.0°C (varies by type and range)
Update Rate: 250 ms typical for all 8 channels
Cold Junction Compensation: Internal, per channel
Open Circuit Detection: Yes
Channel Isolation: Yes – channel-to-channel and to backplane
Backplane Current (5V): Approx. 90 mA
Backplane Current (24V): Approx. 100 mA
Analog Outputs: 0
Input Impedance: >10 MΩ (voltage inputs)

Mechanical Specifications

Width: 94 mm
Height: 46 mm
Depth: 53 mm
Mounting Type: DIN rail via terminal base
Connection Type: Screw terminal (via TB3G or TB3GS)
Installation Orientation: Vertical preferred
Weight: Approx. 140 g
Front Installation: Not supported – base-mounted only
Form Factor: FLEX I/O plug-in module

Environmental Specifications

Operating Temperature: 0…55 °C
Storage Temperature: –40…85 °C
Relative Humidity: 5% to 95% non-condensing
Shock Resistance: 30 g, 11 ms (IEC 60068-2-27)
Vibration Resistance: 2 g, 10–500 Hz (IEC 60068-2-6)
Altitude Rating: Up to 2000 m
Pollution Degree: 2
Ingress Protection: IP20 (when enclosed)
Certifications: CE, UL, cULus, RoHS

Compliance & Communication

System Compatibility: FLEX I/O distributed system
Communication Protocol: Determined by installed adapter (EtherNet/IP, DeviceNet, etc.)
Diagnostics: Open sensor, over/under range, and fault detection
Configuration Software: Studio 5000 / RSLogix 5000
I/O Mapping: Automatically integrated through controller
Data Format: Scaled temperature in engineering units

Key Features & Benefits

✅ 8 Universal Temperature Inputs – Accepts RTDs and thermocouples in a single compact module

✅ 16-bit High Resolution – Ensures precision temperature readings for critical applications

✅ Cold Junction Compensation Included – Improves thermocouple accuracy and system stability

✅ Channel Isolation – Enhances signal integrity in electrically noisy environments

✅ FLEX I/O Integration – Compatible with TB3G and TB3GS for simplified DIN rail installation

📦 Order the Allen Bradley 1794-IRT8 from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable Allen Bradley 1794-IRT8 prices.

Click here to request a quote or buy now

Drive Outlet Megastore – your trusted source for Allen Bradley FLEX I/O modules and temperature input solutions.