The 1025-W power supply module is an auto-ranging unit that supports input voltages between 115 & 240 VAC. The power supply module has internal fans. All switches ship with a blank cover in the second power supply slot. Cisco Config 2 Secondary Power Supply Power supply hot-plug (plug-in module) 600 Watt for P/N: C9200-24P-A, C9200-24P-E, C9200-24P-EDU, C9200L-24P-4G-A=, C9200L-24P-4G-EDU