3com 3C16894 4-slot Chassis User Manual

C

HAPTER

 1: S

WITCH

 7750 C

OMPONENTS

Figure 30   Switch 7750 PoE Power Supply

The Switch 7750 supports PoE external input power up to 2400 W.

Table 45 describes the capabilities of the Switch 7750 PoE power module.

The Switch 7750 provides power through Ethernet ports on the PoE-supported I/O 
modules, supporting the maximum distance of 100 m (328 ft.).

When the Switch 7750 provides power remotely, each Ethernet port can provide 
up to 15.4 W of power to the connected PD.

The fan assembly consists of two to four individual fans and is located on the right 
side of the chassis:

■

4-slot chassis — 3C16871

■

7-slot chassis — 3C16856

■

8-slot chassis — 3C16855

The fans are directly connected to the backplane through connectors. Fan 
operation fault signals are collected and transmitted to the system alarm board 
through the backplane. 

Figure 31 illustrates the fan assembly for the 7- and 8-slot chassis.

Table 45   PoE Power Modules

100 to 140 V

1200 W

2400 W

3

200 to 240 V

2400 W

2