Allen Bradley 1794-IT8 Temperature Input Module

The AB 1794-IT8 is a high-density thermocouple input module from the FLEX I/O series, designed to acquire accurate temperature measurements in distributed control applications. Supporting 8 analog input channels for a wide range of thermocouple types—including B, C, E, J, K, N, R, S, and T—this module delivers 14-bit resolution for precise monitoring and process control.

Ideal for applications in manufacturing, energy, and environmental systems, the 1794-IT8 integrates seamlessly with Rockwell’s FLEX I/O system over various adapters. It connects via TB3, TB3S, TB3T, or TB3TS terminal bases for flexible mounting and field wiring.

Technical Specifications

Model: 1794IT8
Series: FLEX I/O
Type: Temperature Input Module
Input Channels: 8 analog thermocouple inputs
Supported Sensor Types: B, C, E, J, K, N, R, S, T thermocouples
Resolution: 14-bit
Input Type: Thermocouple, RTD, Voltage, Resistance
Terminal Base Compatibility: TB3, TB3S, TB3T, TB3TS

Electrical Specifications

Input Signal Type: mV (thermocouple), Ω (RTD), DC voltage
Input Range: Based on thermocouple type
Update Rate: 250 ms typical for all 8 channels
Accuracy: ±0.5°C to ±2.0°C depending on type and range
Isolation: Channel-to-channel and channel-to-backplane isolation
Conversion Method: Delta-sigma
Analog Outputs: 0
Backplane Power Consumption: Approx. 450 mW
Input Impedance: >1 MΩ (voltage inputs)

Mechanical Specifications

Width: 94 mm
Height: 46 mm
Depth: 53 mm
Mounting Type: DIN rail (via terminal base)
Installation Orientation: Horizontal
Connection Type: Screw terminal via TB3/TB3S/TB3T/TB3TS base
Weight: Approx. 140 g
Front Installation: No – installed via base unit
Rack Mountable: No – FLEX I/O distributed I/O

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)
Pollution Degree: 2
Altitude Rating: Up to 2000 m
Certifications: CE, UL, cULus, FM, ATEX (when used with certified base)

Compliance & Communication

Network Integration: Requires communication adapter (not integrated)
Supported Protocols: Depends on chosen FLEX I/O adapter (e.g., EtherNet/IP, DeviceNet, ControlNet)
System Compatibility: FLEX I/O distributed I/O platform
Data Format: Scaled integer
Diagnostics: Status bits per channel
Cold Junction Compensation: Provided internally
I/O Mapping: Configurable in RSLogix/Studio 5000

Key Features & Benefits

✅ 8-Channel Thermocouple Input – Supports wide range of TC types including J, K, R, S, and more

✅ High Accuracy & Resolution – 14-bit analog resolution for precision temperature monitoring

✅ Flexible Terminal Base Compatibility – Works with multiple base options for tailored wiring layouts

✅ Integrated Isolation – Channel-to-channel and system isolation for enhanced signal integrity

✅ Compact FLEX I/O Form Factor – Ideal for distributed I/O setups in process and control environments

📦 Order the Allen Bradley 1794-IT8 from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable Allen Bradley 1794-IT8 prices. Although currently out of stock, you can still request a quote or place a backorder for this versatile thermocouple input module—perfect for temperature-critical automation projects.

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