The 1746-B16  module is a discrete input module belonging to the Allen-Bradley POINT I/O series manufactured by Rockwell Automation. Here are some key details about this module:

1. Module Type: The 1746-B16 is a 24V DC sourcing discrete input module. It allows you to connect input devices that provide a 24V DC signal, such as sensors, switches, or push buttons, to the control system.

2. Inputs: This module offers 4 input channels, which means it can accept signals from up to 4 devices.

3. Input Voltage: 1746-B16 module is designed to work with 24V DC input signals. It sources 24V DC to the input devices connected to its channels.

4. Current Load: The module is capable of sinking up to 8mA per input point.

5. PointBus Backplane: The 1746-B16 module connects to the POINT I/O system through the PointBus backplane, which provides power and communication between the modules.

6. Terminal Block: The module features a removable terminal block that allows for easy wiring and installation of the input devices.

7. Configuration: The module can be configured and programmed using Rockwell Automation's RSLogix 5000 software (now known as Studio 5000). This software provides a comprehensive environment for developing, configuring, and programming the control system.

8. Compatibility: The 1746-B16 module is compatible with other modules in the POINT I/O series and can be used in conjunction with them to create a distributed I/O system.

When installing the1746-B16 module, make sure to follow the proper wiring and installation instructions provided by Rockwell Automation in the product documentation. This will ensure correct functionality and integration with your control system.