General Information

General Information

Overview

The required power and grounding configurations for AC powered and DC powered systems are shown in the following illustrations. Also shown are power and grounding configurations of AC and DC systems required for CE* compliance. NOTE: Each rack shown has its own ground connection; that is, a separate wire returning to the main grounding point, rather than "daisy chaining" the grounds between power supplies or mounting plates. The main grounding point is the local common connection of the panel ground, equipment ground, and earth grounding electrode.

CE Compliance The CE mark indicates compliance with the European Directive on Electromagnetic Compatibility (EMC) (89/336/EEC) and the Low Voltage Directive (73/23/EEC). NOTE: In order to maintain CE compliance, the Quantum system must be installed in accordance to these instructions.

Chassis Grounding A chassis ground wire is required for each rack. The wire is connected between one of four ground screws (located on the rack) and the main ground point of the power system. This wire should be green (or green with a yellow stripe) and the AWG rating must be (at a minimum) sized to meet the fuse rating of the supply circuit.

DANGER

ELECTRIC SHOCK

The user is responsible for compliance with national and local electrical code requirements with respect to grounding of all equipment.Read, understand and implement the wiring and grounding requirements in this section. Failure to follow these instructions will result in death or serious injury.

Power Supply Grounding On each power supply connector there is a ground connection. The preferred connection is between the power supply connector ground terminal and one of the rack ground screws. This wire should be green (or green with a yellow stripe) and at a minimum the same AWG rating as the power connections to the supply. In racks with multiple power supplies, each supply should have a ground connection between its input connector and the rack ground screws. NOTE: It is recommended that the power supply, feeding the I/O modules, is grounded at the main ground point.

Other Equipment Grounding Other equipment in the installation should not share the grounding conductor of the system. Each piece of equipment should have its own grounding conductor returning to the main grounding point from which the equipment power originates.

Systems with Multiple Power Feeds In systems with multiple power feeds, the grounding should proceed in the same manner as single feed systems. However, a zero volt potential difference must be maintained between the equipment grounding conductors of the separate systems to prevent current flow on communication cables.