3Com S27x, S26x, S24x installation manual Back Panel Components

Hardware Components

Back Panel

Back Panel Components

The components of the back panel are:

•Serial/Network I/O Ports. Ports 1, 2, 3, and 6 are DB-25 connectors. Port 4 is a DB 15 connector.

•AC Power Supply. The rear of the Power Supply has two (male and female) power source connectors (one is for connection to an AC source and the other is an AC outlet) along with a selectable 115 VAC or 230 VAC switch. For most international usage, the switch must be set for 230 VAC.

•DC Power Supply. The unit can be shipped with the -48VDC Power Option. The terminal block of the -48VDC has 5 screws. The two outermost screws are for attachment. The negative wire terminal is second from the left; the positive wire terminal is in the middle; the ground is second from the right.

•Expansion Card Ports. The expansion card ports differ depending on what card is installed in that slot.

Figure 1-10shows the PathBuilder S24x, 26x, and 27x switch back panel.

Optional -48V

Power Supply

Power
Supply
	115/230 VAC
	Voltage Select
AUI Port 4	Switch
(Ethernet Routing)
	Serial/Network
	I/O Ports 1,2, 3, 6
Product
ID Label
	Expansion
	Card Ports
	Slots 1 through 8

Figure 1-10. PathBuilder S24x, 26x, and 27x Switch Back Panel

1-16 About the PathBuilder S24x, 26x, and 27x switch