What is a distinctive feature of R62/62A equipment?

The distinctive feature of R62/62A equipment is that it has no drum switches. This design choice is significant as drum switches were commonly used in older train models for controlling various operations. The absence of drum switches in the R62/62A represents an advancement in technology and operational efficiency.

The R62/62A trains utilize alternative control systems that offer improved reliability and ease of use for operators. This shift reflects a broader trend in train design, moving towards more modern and user-friendly controls.

Other options, while they may pertain to different train equipment features, do not represent the key characteristic of the R62/62A models as directly as the point regarding drum switches does. Each of the other options might be true for different types of equipment, but they lack the specific relevance to the R62/62A's defining characteristics.