With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cefcMIBPowerOperModeGroup
Cisco Entity Field Replaceable Unit Control MIB Power Operation Mode Group
1.3.6.1.4.1.9.9.117.3.2.12
The collection of objects which are used to monitor the device's power supply operational redundancy mode.
Back to CISCO-ENTITY-FRU-CONTROL-MIB MIB page.
IPHost Network monitor allows you to monitor cefcMIBPowerOperModeGroup on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.