H3C Technologies H3C S12500 Series Switches - Manual (Page 47)

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Figure 37 Connecting the DC power cord to the terminal block
6. Connect the other end of the DC power cord to the power source:
{
Connect the other end of the black DC power cord to the RTN (+) terminal that provides power
to the switch.
{
Connect the other end of the blue DC power cord to the –48V terminal that provides a power
supply to the switch.
{
Connect the other end of the grounding cable to a reliable grounding point.
7. Install the protection cover on the terminal block.
Figure 38 Installing the protection cover
Connecting the PSE20KD1 DC power cords
The S12508-DC and S12518-DC models adopt the PSE20KD1 DC power system.
To connect the PSE20KD1 DC power cords:
1. Remove the screws from the power frame.
2. Secure the blue DC power cord to the NEG (–) terminal on the terminal block with screws using a
Phillips screwdriver.