Which series of Cisco devices have removable power supplies?

The 6500 series of Cisco devices is renowned for its modular design, which includes the capability for removable power supplies. This design feature allows for easy maintenance, scalability, and redundancy. The modular architecture means that if a power supply fails or requires upgrading, it can be replaced without needing to shut down the entire system, thus minimizing downtime and providing uninterrupted service.

This series is widely used in enterprise networking environments due to its flexibility in accommodating various types of network traffic and services. The ability to have removable power supplies supports the need for high availability and reliability, which are critical in enterprise settings.

In contrast, other series mentioned do not typically feature the same level of modularity or the ability to easily swap out power supplies while the device is operational. Thus, it is the 6500 series that stands out for this capability.