Structural Features of an N68E Cabinet

Cabinet Material

The N68E cabinet is made of electro-galvanized steel sheets and cold-rolled steel sheets assembled by screws. The fireproof performance of internal materials complies with the standards of the Underwriter Laboratories (UL).

Cabling Mode

Cable apertures are reserved on the top and at the bottom of the N68E cabinet, so that the N68E cabinet supports overhead cabling and underfloor cabling. The following describe the two cabling modes:

• In the overhead cabling mode, external cables enter the cabinet through the top of the cabinet. Figure 2-11 shows the cable apertures.
• In the underfloor cabling mode, external cables enter the cabinet through the bottom of the cabinet.

The devices described in this document use the overhead cabling mode.

Figure 2-11 Cable apertures on the cabinet top

ESD Jack

Before installing the N68E cabinet, wear an ESD wrist strap and insert connector of the ESD wrist strap into the ESD jack in the middle of the N68E cabinet, as shown in Figure 2-12.

Figure 2-12 ESD jack in the middle of the N68E cabinet

Heat Dissipation

The front door, rear door, and top plate of the N68E cabinet have high-density air vents. Therefore, the N68E cabinet supports front air intake, rear air exhaust, and upper air exhaust and provides good heat dissipation performance.

• The devices described in this document adopt left-to-back airflow for heat dissipation and have fans installed at the rear of chassis.
• The airflow of devices described in this document in the cabinet is: front of the cabinet -> left side of the equipment -> inside the equipment -> rear of the equipment -> rear of the cabinet, as shown in Figure 2-13.

Figure 2-13 Airflow in the cabinet

Protection Performance

The protection performance of an N68E cabinet is described as follows:

• The cabinet design takes full account of electromagnetic compatibility (EMC) to ensure an excellent electromagnetic shielding performance.
• The air vents on the bottom plate of the cabinet have air filters installed, which enhance the dust-proof capability of the N68E cabinet.
• The grounding resistance of the N68E cabinet does not exceed 0.1 ohm.

Installation Scenarios

An N68E cabinet can be installed on:

• Concrete floor
• ESD floor, in which case the N6X series supports are required

Cabinet Combination

N68E cabinets can be installed side by side. When installing N68E cabinets side by side, connect them using connecting plates, as shown in Figure 2-14. Connecting plates are delivered with the cabinet.

Figure 2-14 Combined N68E cabinets