RAD Data comm LRS-24 Site Requirements and Prerequisites, AC Power, DC Power, Grounding

Chapter 2 Installation and Setup LRS-24Installation and Operation Manual

2.2 Site Requirements and Prerequisites

This section describes how to prepare the site for installation of the LRS-24 hub.

AC Power

Install the LRS-24 chassis with AC power supply modules within 1.5m (5 feet) of an easily accessible, grounded, 100 to 240 VAC outlet.

DC Power

LRS-24 chassis with DC power supply modules require a –48 VDC power source. Since no power switch is provided for the DC power supply modules, connect the DC power to LRS-24 through a circuit breaker located close to LRS-24. This provides overcurrent protection for the input power line, and enables turning off power to LRS-24.

Grounding

The LRS-24 case must be properly grounded at all times, both to protect the user and to prevent possible damage to equipment. It will prevent damage

when a fault condition occurs on the lines connected to the equipment, such Warning as lightning stroke or contact with high-voltage power lines.

Never connect cables to an LRS-24 that is not properly grounded. Any interruption of the protective (grounding) connection inside or outside the equipment or the disconnection of the protective ground terminal can make this equipment dangerous. Intentional interruption is prohibited. Before switching on this equipment and before connecting any other cable, the protective ground terminal of the enclosure must be connected to a protective ground.

The LRS-24 enclosures are grounded through the protective (grounding) conductor of the power cable. In addition, each of the LRS-24 power supply interface modules has a grounding screw located on its front panel. Connect this screw by a short, wide copper strap to a reliable, low-resistance grounding system.

Caution When LRS-24 is installed in racks, the rack itself should also be grounded in accordance with standard practice and the locally applicable regulations. Installing LRS-24 in a grounded rack provides additional protection against fault conditions.

Interface Module Handling Precautions

LRS-24 interface modules are grounded by installation in a grounded LRS-24 chassis.

2-4 Site Requirements and Prerequisites

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