The CPR-4011-4M1 hot-swappable AC power supply modules are designed to be compatible with the S5850-48S6Q, S5850-48S2Q4C, S8050-20Q4C Ethernet Switches and T5850-48S6Q, T5850-48S2Q4C, T8050-20Q4C TAPs. You can install it without powering off the switch or disrupting the switching function.
The AC power supplies in S5850-48S6Q, S5850-48S2Q4C, S8050-20Q4C Ethernet Switches and T5850-48S6Q, T5850-48S2Q4C, T8050-20Q4C TAPs give an output of 400W and support both low line voltage (100–120 VAC) and high line voltage (200–240 VAC). They provide a low-cost, simple solution to the problem of a failure of the internal power-supply of an Ethernet switch, which can result in the shutdown of that switching device and maximize the availability of the switching device.