Which characteristic cannot be identified from the part number of a 1769 Compact I/O module?

The part number of a 1769 Compact I/O module provides critical information about the module's attributes, but it does not convey the firmware revision. The firmware revision is a version detail that can change over time as the manufacturer updates the software that runs on the module. This information is typically found on the module itself or within the device's software configuration and documentation rather than being encoded in the part number.

In contrast, the part number does allow users to determine if the module is an input or output device, the number of points for a digital I/O module, and the number of channels for an analog I/O module. This enables users to choose the appropriate module based on their specific application requirements, but it does not track the firmware version, which can vary even within the same model or part number due to updates and revisions.