Zhone Technologies IMACS-200 System Power Redundancy, AC Power Supply and DC Power Supply Fuses

Power and Grounding on the IMACS-200 System Installation

2.5.2System Power (Redundancy)

The IMACS-200 provides power redundancy for any of the powering options. The supplies are factory-installed, and the external connectors to receive the powering options selected will be pre-installed on the unit. Figure 2-4 on page 2-5high-lites the location of the Power Supply feeds.The 120VAC and 220VAC power inputs are lightly shaded, and the -48VDC and 125VDC options are darkly shaded.

2.5.3AC Power Supply and DC Power Supply Fuses

The AC power supply and DC Power Supply fuses are already built in to the supplies. These fuses are not field serviceable. When unpacking the unit, an AC power cord will be in the box for each of the AC power supplies ordered. The AC inlet connector is located in the rear corners of the chassis. For a single supplied unit, the rear right-hand connector will be equipped. Refer to the system specifications section in this manual for input power requirements.

2.5.4System Power and Ground Connections

After installing the system, make the power and ground connections to the chassis as described in this section. A frame ground connection is provided in the right-rear corner of the IMACS-200 rear panel.

2.5.5Grounding requirements

Due to the UL regulatory requirements, a mounting stud is required for connection of the AC input earth ground lead to the product chassis. The ground lead must be connected to the chassis using a No. 6 screw, which is included. When grounding the system, use 14 gauge solid wire for a single connection to the provided earth ground screw. The mounting location is labeled with the IEC 417 No. 5019 symbol to identify this as the AC earth ground connection point. This mounting stud is located next to the IEC 320 AC input connector.

2.5.6Chassis with Power Supplies

Figure 2-4 on page 2-5shows the different power connections on the chassis.

For DC powered systems, the lower right and lower left-hand connections provide for separate, redundant power feeds to the system's pre-installed DC power supplies if so equipped. These two sets of leads provide a connection for separate, redundant power feeds to the system in a load-sharing mode.

2-14 System Installation