A-B 1794-TB3G

The Allen-Bradley 1794 series is a compact Logix5000 series controller from Rockwell Automation that is widely used in industrial automation. This series module has the characteristics of modularity, flexibility and reliability, and can meet the needs of different users.

The 1794-TB3GA-B and 1794-TB3G modules belong to the 1794 series, but have slightly different functions.

1794-TB3GA-B module
Product Name: Allen-Bradley Point I/O Base Module with expansion slot

Product Description:

As the base module of the 1794 series, it provides power and communication interfaces for other I/O modules.
The module itself does not have input and output functions, and needs to be used with other I/O modules.
The main difference from the 1794-TB3SA-B is that the module comes with an expansion slot that can be inserted into the expansion module to increase I/O points or other functions.
Main functions:

Supply power: Power the I/O module connected to it.
Provide a communication interface: communicate with the controller to realize data exchange.

Provides an expansion slot for inserting an expansion module.
1794-TB3G module
Product Name: Allen-Bradley Point I/O Backplane (with Expansion slot)

Product Description:

It is also the base module of the 1794 series, similar in function to the 1794-TB3s.
The main difference from the 1794-TB3S is that the module comes with an expansion slot that can be inserted into the expansion module to increase I/O points or other functions.
Main functions:

Supply power: Power the I/O module connected to it.
Provide a communication interface: communicate with the controller to realize data exchange.
Provides an expansion slot for inserting an expansion module.