Lenovo ThinkSystem ST550 7X09 Maintenance Manual page 155

Figure 109. Hot-swap power supply label
Attention: This type of power supply is hot-swap only when two power supplies are installed for
redundancy. If only one power supply is installed, you must power off the server first before removing the
power supply.
The following tips describe the information that you must consider when you remove a power supply with dc
input.
CAUTION:
240 V dc input (input range: 180-300 V dc) is supported in China ONLY. Power supply with 240 V dc
input cannot support hot plugging power cord function. Before removing the power supply with dc
input, please turn off server or disconnect dc power sources at the breaker panel or by turning off the
power source. Then, remove the power cord.
在直流输入状态下，若电源供应器插座不支持热插拔功能，请务必不要对设备电源线进行热插拔，此操作可能
导致设备损坏及数据丢失。因错误执行热插拔导致的设备故障或损坏，不属于保修范围。
NEVER CONNECT AND DISCONNECT THE POWER SUPPLY CABLE AND EQUIPMENT WHILE YOUR
EQUIPMENT IS POWERED ON WITH DC SUPPLY (hot-plugging). Otherwise you may damage the
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Chapter 3 Hardware replacement procedures