Connecting The Poe Power Cord - 3Com 3C16895 Installation Manual

Connecting the PoE
Power Cord
1 Loosen the mounting screw of the PoE terminal block on the rear panel of the
2 Insert the -48V OT terminal of the DC power cord to the NEG (-) terminal of the
3 Insert the GND OT terminal of the DC power cord to the RTN (+) terminal of the
4 Insert the PGND OT terminal of the DC power cord to the grounding screw of the
Follow these steps to connect the power cord from the PoE rack:
switch.
switch and fasten the mounting screw; insert the other end to the NEG (-) terminal
of the external PoE power supply. See Figure 29 for a detailed view.
Figure 29 Back of the PoE Rack
1 PoE external power input: NEG (-)
2 (+) PoE external power input: NEG (+)
3 COM port (external power monitor)
switch and fasten the mounting screw; insert the other end to the NEG (-) terminal
of the site power.
Figure 30 Front Panel of the PoE Rack
1 AC input socket
2 DC output terminal: NEG (-)
3 DC output terminal: RTN (+)
4 RS232 serial port
switch and fasten the mounting screw; insert the other end to the grounding bar
for the switch.
For detailed instructions on how to install the PoE rack, see the Switch 7750 PoE
Rack Installation Guide.
Connecting and Configuring Power 39