3-19
Figure 3-25
Connect an AC power cord to AC power socket of PRS150-A (1)
Figure 3-26
Connect an AC power cord to AC power socket of PRS150-A (2)
Connecting the -48V DC Power Cord
The PSR150-D of the S5500-20TP-SI has a –48 VDC power receptacle, allowing the use of the –48
VDC power supply in the equipment room.
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 3-27
). (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 3-27
).
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.
