Allen-Bradley 1738-ACNR module is a digital output module from the POINT I/O series produced by Rockwell Automation. Here are some key details about this module:

1. Module Type: The 1738-ACNR is a digital output module that provides discrete output control for industrial applications. It allows you to control external devices, such as solenoids, motors, or lamps, based on the output signals from the PLC.

2. Outputs: This module provides 2 output channels, enabling control of up to 2 devices.

3. Output Voltage Rating: The 1738-ACNR  module is designed to operate within a voltage rating range of 24V DC.

4. Current Rating: The module can handle a maximum output current of 2 Amps per output channel.

5. PointBus Backplane: The module is connected to the POINT I/O system through the PointBus backplane, which provides power and communication among the modules.

6. Terminal Block: The module includes a removable terminal block that facilitates easy wiring and installation of the output devices.

7. Configuration: The 1738-ACNR  module can be configured and programmed using Rockwell Automation's RSLogix 5000 software (now known as Studio 5000), which provides a comprehensive environment for programming and configuring the control system.

8. Compatibility: The 1738-ACNR  module is compatible with other modules in the POINT I/O series. It can be used in combination with other modules to create a distributed I/O system.

When installing the 1738-ACNR module, you should follow the appropriate installation guidelines and wiring practices provided by Rockwell Automation in the product documentation to ensure proper functionality and integration with your control system.