3Com 3C16896 8 slot AC Chassis, 3C16895 7-slot Chassis, 3C16894 4-slot Chassis manual Fan Assembly

34CHAPTER 1: SWITCH 7750 COMPONENTS

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.

Table 45 PoE Power Modules

	Power supplied		Power modules
			needed for
Input voltage	1 Power module	2 Power module	redundancy
100 to 140 V	1200 W	2400 W	3
200 to 240 V	2400 W		2

	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.
Fan Assembly	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.