What is one of the key features of the programmable logic controllers in this setup?

Programmable Logic Controllers (PLCs) are essential components in many industrial and automation systems, particularly in switchgear applications. One of their key features is their ability to support binary data point recording. This capability allows PLCs to monitor and log various states and processes, particularly the on/off status of different devices and equipment, which is often represented in binary form.

By efficiently handling binary data, PLCs can help in monitoring the operational status of equipment, detecting faults, and initiating appropriate responses based on pre-programmed logic. This feature is vital for maintaining system integrity and ensuring timely responses to changes in the operation, whether it involves switching, alarms, or operational control.

In this context, the other options, while useful in various applications, do not align with the primary function of PLCs in switchgear setups. Data entry is typically handled by human-machine interfaces (HMIs) rather than PLCs. Recording power outages may be a function of a specific monitoring system rather than a core feature of PLCs themselves. Managing voltage conversions is generally associated with transformers and power electronics rather than PLCs.