Lenovo ThinkAgile HX1521-R User Manual page 63

To Connect:
1. Turn OFF all power sources and equipment that is to
be attached to this product.
2. Attach signal cables to the product.
3. Attach power cords to the product.
• For ac systems, use appliance inlets.
• For dc systems, ensure correct polarity of -48 V dc
connections: RTN is + and -48 V dc is -. Earth
ground should use a two-hole lug for safety.
4. Attach signal cables to other devices.
5. Connect power cords to their sources.
6. Turn ON all the power sources.
Before installing a hot-swap power supply, touch the static-protective package that contains the new hot-
swap power supply to any unpainted surface on the outside of the server. Then, take the new hot-swap
power supply out of the package and place it on a static-protective surface.
To install a hot-swap power supply, complete the following steps:
To Disconnect:
1. Turn OFF all power sources and equipment that is to
be attached to this product.
• For ac systems, remove all power cords from the
chassis power receptacles or interrupt power at
the ac power distribution unit.
• For dc systems, disconnect dc power sources at
the breaker panel or by turning off the power
source. Then, remove the dc cables.
2. Remove the signal cables from the connectors.
3. Remove all cables from the devices.
.
Chapter 8 Hardware replacement procedures
59