Allen-Bradley 1794-IT8 FLEX I/O 8-Channel Thermocouple Input Module

Availability: 99 left in stock

Product Description The Allen-Bradley 1794-IT8 is a high-resolution thermocouple and millivolt input module for the FLEX I/O platform. It provides eight independently configurable differential input channels,...

SKU: 1794-IT8

Manufacturer: Allen Bradley
Product No.: 1794-IT8
Product Type: Thermocouple Input Module
Product Origin: USA
Payment:T/T, Western Union
Weight: 2000g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Product Description

The Allen-Bradley 1794-IT8 is a high-resolution thermocouple and millivolt input module for the FLEX I/O platform. It provides eight independently configurable differential input channels, supporting a wide range of thermocouple types as well as direct millivolt signals for precise temperature measurement.

Using a 16-bit A/D converter, the 1794-IT8 delivers high accuracy for critical thermal monitoring. Integrated cold junction compensation (CJC) support and open-wire detection ensure reliable data acquisition, even in harsh industrial environments. Its modular FLEX I/O design allows I/O to be installed close to field sensors, reducing wiring complexity, cabinet space, and installation costs.

Technical Specifications

Parameter	Description
Model Number	1794-IT8
Input Channels	8 differential
Supported Inputs	Thermocouple or millivolt
Nominal Input Range	−76.5 mV to +76.5 mV
Resolution	16-bit (≈ 2.384 μV/LSB)
Data Formats	16-bit 2’s complement or Offset Binary
Channel Bandwidth	0 to 2.62 Hz (−3 dB)
Isolation Voltage	850 V DC (1 s, inputs/user power to logic)
Flexbus Current	20 mA
Power Dissipation	Max. 3.0 W @ 31.2 V DC
Thermal Dissipation	Max. 10.2 BTU/hr
Status Indicators	1 Red/Green LED (Power & Health)
Compatible Terminal Bases	1794-TB2, 1794-TB3, 1794-TB3T
Dimensions (W × H × D)	45.7 × 94.0 × 53.3 mm

Typical Applications

Process Temperature Monitoring
Accurate sensing in reactors, furnaces, kilns, and heat exchangers.
Skid-Mounted Systems
Distributed temperature inputs close to sensors using FLEX I/O.
Energy & Utilities
Boiler, turbine, and exhaust temperature monitoring.
OEM Equipment
Compact, high-density temperature acquisition in packaged machinery.

Technical FAQ

Q: Does the 1794-IT8 require a separate CJC sensor?
A: Yes. Accurate thermocouple measurement requires a CJC-enabled terminal base, such as the 1794-TB3T, to compensate for ambient connection temperature.

Q: What happens if a thermocouple wire breaks?
A: The module provides open-circuit detection. When a break is detected, the channel drives to a predefined fault value (typically full scale) to alert the controller.

Q: Can different thermocouple types be mixed on one module?
A: Yes. Each channel is independently configurable in the controller software for its specific thermocouple type or millivolt range.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.