3-19
Follow these steps to connect a –48V DC power cord to the switch:
Step1
Wear an ESD-preventive wrist strap, ensure a good skin contact and make sure that the
ESD-preventive wrist strap is properly grounded.
Step2
Keep the upside of the DC plug shipped with the device on top and plug it in the DC receptacle (see
callout 1 in
Figure 3-25
). (If you plug it with the upside down, the insertion is not smooth because of the
specific structure design of the DC receptacle and the plug.)
Step3
Use a flat-blade screwdriver to fix the two screws on the DC plug clockwise to secure the plug to the DC
receptacle (see callout 2 in
Figure 3-25
).
Step4
Connect the other end of the DC power cord to the external –48 VDC equipment-room power supply
system.
Step5
Check whether the system status LED (PWR/SYS) on the front panel of the switch is ON. If yes, the
power is properly connected.
Figure 3-25
Connect a -48V DC power cord
z
Pay attention to the positive (+) and negative (-) marks on the power cord to avoid connection
mistakes.
z
You can also use an external RPS power supply unit to connect to the –48 VDC power receptacle.
For how to connect the power cord to the RPS power supply unit, refer to
Connecting the RPS
Power Cord of the S5500-28C-PWR-EI and S5500-52C-PWR-EI
.
Connecting the RPS Power Cord
Connect RPS power cords of S5500-28C-EI, S5500-52C-EI and S5500-28C-EI-DC
The S5500-28C-EI and S5500-28C-EI-DC can work with RPS500-A3 using its +12 V/10.5 A output and
a 0404A08G power cord; The S5500-52C-EI can work with RPS800-A using its +12 V/17.25 A output
and a 0404A08G power cord. Procedures for connecting the RPS power cords are the same for these
three models.
Follow these steps to connect an RPS power cord to the switch:
Step1
Wear an ESD-preventive wrist strap, ensure a good skin contact and make sure that the
ESD-preventive wrist strap is properly grounded.