Allen-Bradley 1794-TB3G
Allen-Bradley 1794-TB3G
Allen-Bradley 1794-TB3G
Allen-Bradley 1794-TB3G
Allen-Bradley 1794-TB3G
Allen-Bradley 1794-TB3G
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1794-TB3G

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The Allen-Bradley 1794-TB3G is a terminal block unit in the Flex I/O series, featuring excellent current handling capabilities.
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Technical specifications for 1794-TB3G

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1794-TB3G
  • Product Family:
    Flex I/O
  • Terminal Screw Torque:
    0.56 to 0.79 Nm
  • Supply Voltage Rating:
    31.2 VAC/DC
  • Min. Frequency:
    50 Hz
  • Max. Frequency:
    60 Hz
  • Current Rating:
    10A
  • Isolation Voltage:
    2500 VDC
  • Wire Size:
    24 to 16 AWG
  • Weight:
    0.2 kg
  • Estimated shipping dimensions:
    9.6x9.6x5.8cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Use Cases Communication & Connectivity Environmental Ratings

Features:

  • Terminal Base Unit for Flex I/O Series Distributed I/O System
  • Combines Flexible Wiring Capabilities with Secure Module Mounting
  • Operates in Conjunction with 1794 Series I/O Modules and Flex I/O Adapters
The Allen-Bradley 1794-TB3G serves as the terminal base unit in a Flex I/O system, providing reliable electrical connections between field devices and I/O modules. It continuously accommodates input voltage ratings of 31.2 VAC/DC and supports current handling up to 10 Amps maximum, distributing power through screw terminals to support steady state operation of connected modules and devices. Consistent performance is standard with the 1794-TB3G, as the unit maintains stable connections across a broad operating temperature range from -20°C to 70°C. The 1794-TB3G has made improvements in wiring flexibility over previous terminal base designs by supporting wire sizes ranging from 24 AWG to 16 AWG within the Flex I/O platform.

The 1794-TB3G provides essential connectivity functions common to the entire I/O module, and is a critical component of the signal path, directly affecting the proper, normal operation of the overall control system. One 1794-TB3G terminal base is required per I/O module depending on the specific module type being installed. The 1794-TB3G occupies the base position beneath the I/O module and is always secured with a recommended terminal screw torque between 0.56 and 0.79 Nm for optimal electrical contact.

For High Vibration Environment applications, the 1794-TB3G withstands mechanical stress up to 5 g across a frequency range from 10 to 500 Hz. In addition to standard wiring termination, the robust construction also performs reliably under demanding conditions. The 1794-TB3G vibration resistance ensures continuous operation using the internal terminal design specified in the base unit specifications. Using this method, the terminal base system continually maintains signal integrity in dynamic industrial settings. If the system experiences significant mechanical disturbance or environmental stress, the 1794-TB3G will preserve electrical continuity and ensure stable communication between field devices and the control system.

The 1794-TB3G Allen-Bradley Flex I/O Terminal Base Unit may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Allen-Bradley 1794-TB3G Flex I/O Terminal Base Unit Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Allen-Bradley 1794-TB3G Flex I/O Terminal Base Unit Specs

General

  • Manufacturer Allen-Bradley
  • Model 1794-TB3G
  • Condition New Original ready stock
  • Product Family 1794-TB3,1794-TB3K,1794-TB32
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • In-Cabinet Distributed I/O: Designed for mounting on a 35mm DIN rail or panel within an industrial enclosure to save space compared to rack-based systems.
  • 3-Wire Device Termination: Specifically built to terminate field wiring for 3-wire input or output devices.
  • High-Grounding Requirements: Ideal for applications requiring extensive grounding, as it provides 10 chassis ground terminals for modules like RTDs or analog modules.
  • Modular Expansion: Allows users to add or replace I/O modules independently to meet changing application needs without re-wiring the entire system.
  • Module Compatibility: Directly houses and connects various FLEX I/O modules, including digital, analog, and specialty types.
  • Network Interface: Connects to scanners via a FLEX I/O communication adapter (sold separately), enabling communication over: EtherNet/IP ControlNet and DeviceNet PROFIBUS DP and Remote I/O.
  • Operating Temperature: -20°C to 70°C (-4°F to 158°F).
  • Storage Temperature: -40°C to 85°C (-40°F to 185°F).
  • Humidity: 5% to 95% non-condensing relative humidity.
  • Vibration & Shock: Rated for 5g vibration at 10–500 Hz and 30g operational shock.
  • Hazardous Ratings: UL Listed for Class I, Division 2, Groups A, B, C, and D.
  • Protection Class: IP20 (Open-style equipment) requiring an external enclosure.
Description
The Allen-Bradley 1794-TB3G serves as a terminal base unit within the Flex I/O series, designed to deliver effective connectivity solutions for industrial automation systems. With an input voltage rating of 31.2 VAC/DC, the 1794-TB3G ensures reliable operation across various industrial situations. The 1794-TB3G operates efficiently within a frequency range of 50 to 60 Hz, making it suitable for standard power systems worldwide. This unit allows excellent current handling, as the 1794-TB3G is rated for a maximum of 10 Amps, which is essential for powering connected devices or modules in demanding control applications. The 1794-TB3G terminal base supports wire sizes from 24 AWG to 16 AWG, making it adaptable for different wiring needs in panel installations. The terminal screw torque recommended for secure connections on the 1794-TB3G ranges between 0.56 and 0.79 Nm, ensuring stable electrical contacts.

This 1794-TB3G terminal base is specifically designed for handling flexible I/O configurations in distributed control systems, solving the challenge of modular expansion in space-constrained industrial environments. The 1794-TB3G enables engineers to quickly add or replace I/O modules without rewiring the entire system, significantly reducing downtime during maintenance or system upgrades.

In terms of environmental compatibility, the 1794-TB3G displays a broad operating temperature capability, suitable for conditions between -20°C and 70°C, allowing deployment in harsh manufacturing floors. For storage, the 1794-TB3G can endure extreme temperatures, classified from -40°C to 85°C. The 1794-TB3G also supports high levels of relative humidity, functioning effectively in ranges of 5 to 95% without the risk of condensation, which is critical for food processing or chemical plants where moisture is prevalent.

Moreover, the 1794-TB3G is designed to withstand vibrations of up to 5 g across a frequency range from 10 to 500 Hz, ensuring consistent performance even in dynamic settings such as packaging lines or material handling systems. The isolation voltage of the 1794-TB3G, rated at an impressive 2500 VDC, enhances safety and reliability in industrial applications where electrical interference is a concern. With these robust specifications, the Allen-Bradley 1794-TB3G is a solid choice for constructing flexible and robust control systems in a variety of industrial environments, including automotive assembly, water treatment facilities, and oil and gas operations.
Revisions

Revision Part #

Also known as

1794-TB3G Ser A
1794-TB3G/A, Series A, Rev A
Alternative Names
1794- TB3T 1794-TB3GK 1794-TB32 1794-TB3K 1794-TB3 1794-TB3SK
Technical notes
The Allen-Bradley 1794-TB3G flexible I/O terminal base unit has a terminal screw torque of 0.56-0.79 Nm, a maximum supply voltage range of 31.2V DC/AC, 50/60Hz, 10A, and a maximum continuous isolation voltage of 50V. It is also suitable for wire diameters of 0.21-1.3 mm².
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What is the recommended terminal torque for the 1794-TB3G?
The recommended screw torque ranges from 0.56 to 0.79 Nm, ensuring secure and stable electrical connections.
Is the 1794-TB3G suitable for vibration-intensive environments?
The terminal base can withstand vibrations up to 5 g across a frequency range of 10 to 500 Hz, making it ideal for dynamic applications like packaging lines and material handling systems.
What safety features does the 1794-TB3G offer?
It provides an isolation voltage rating of 2500 VDC, enhancing electrical safety and protecting systems from interference in demanding industrial applications.

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