3.2.9 Installing/Replacing the Power Supply UnitFunctionPSU Type Lower/Upper Input Voltage Range Current Input FrequencyPSU-MLower: 100 V AC to 130 V AC 2.5 A*1 50 Hz or 60 HzUpper: 200 V AC to 240 V AC 1.4 APSU-LLower: 100 V AC to 130 V AC 5.1 A*1Upper: 200 V AC to 240 V AC 2.55 A*1 When you are installing multiple shelves, make sure that the total ampere rating of all the devices plugged into the AC outlet doesnot exceed the ampere rating of either the AC outlet or the breaker.AC InletPower SwitchPSU-M/PSU-LBattery SwitchEarth TerminalBattery ConnectorAccessories and User-supplied ItemsAccessories (included): Screws ´ 4User-supplied (not included): Earthing wire, Back-up Battery Cable (KX-A228 for PSU-M, or KX-A229 forPSU-L)WARNING• Each PSU complies with Safety Class 1 of IEC60950, EN60950, UL60950, CAN/CSA-C22.2 No.60950, and AS/NZS60950; therefore a protective earth connection exists between the mainsoutlet ground and the PSU case. To ensure the PBX chassis is safely grounded, it is essentialthat the PSU case be securely fastened to the PBX chassis with the 4 screws provided witheach PSU.• Never install or replace a PSU during a lightning storm.• Never install or replace a PSU in wet locations.• Never install or replace a PSU unless at least 20 s has elapsed after the AC supply and backupbattery supply are disconnected.NoticeWhen installing or replacing a PSU, read Important Safety Instructions and Important Information inthis manual carefully, and always follow these guidelines to reduce the risk of fire, electric shock and injury.110 Installation Manual3.2.9 Installing/Replacing the Power Supply Unit
