C H A P T E R 2

Site Preparation

This chapter describes how to prepare your site for installing a Netra CT server. This chapter contains the following topics:

Tools Required

Planning the Placement of the Rack

Planning the Rackmounting Configuration

Chassis and Server Physical Specifications

Power Source Requirements

Connecting Logic Ground and Chassis Ground

Cooling Requirements

Environmental Specifications

Tools Required

Obtain the following tools to perform the procedures in this document:

No. 1 Phillips screwdriver

No. 2 Phillips screwdriver

Planning the Placement of the Rack

The Netra CT server is designed so that all cables to the CompactPCI boards are connected from the rear of the chassis. The servers are used in areas where the rack is positioned in a room in such a way that both the front and the rear of the chassis are accessible.

FIGURE 2-1 shows an example of a server room layout and how servers might be positioned.

FIGURE 2-1 Example of a Server Room Layout

Planning the Rackmounting Configuration

You can mount several Netra CT chassis into a rack, depending on the size and model of the rack. For example, you could install up to three Netra CT chassis in a standard 19-inch rack, with room left over for one or more external SCSI devices.

The following figures show how the Netra CT chassis can be installed in a rack with supported external SCSI devices. Note that the external SCSI device shown in the figures might be different from the one that you install in your configuration.

FIGURE 2-2 Example Configuration 1: Three Chassis, No External SCSI Devices

FIGURE 2-3 Example Configuration 2: Three Chassis, Two External SCSI Devices

Chassis and Server Physical Specifications

Chassis Physical Specifications

TABLE 2-1 Netra CT Server Chassis Physical Specifications
	U.S.	Metric
Width	17.5 inches	444.5 mm
Depth:
Default configuration, with rackmount brackets extended as shown in FIGURE 2-4	15.8 inches	400 mm
With rackmount brackets flush against the bottom of the chassis	13.8 inches	350 mm
Height	21 inches	533.6 mm
Weight (empty)	74 lb	33.6 kg
Weight (fully loaded)	150 lb	68 kg

FIGURE 2-4 Physical Specifications for the Netra CT Chassis

Netra CT 810 Server Physical Specifications

TABLE 2-2 Netra CT 810 Server Physical Specifications
Measure	U.S.	Metric
Width	8.6 inches	217.5 mm
Depth	15 inches	378.3 mm
Height	20.2 inches	512.7 mm
Weight, fully loaded	38 lb	17.2 kg

FIGURE 2-5 Netra CT 810 Server Physical Specifications

Netra CT 410 Server Physical Specifications

TABLE 2-3 Physical Specifications, Netra CT 410 Server
Measure	English	Metric
Width	4.3 inches	108 mm
Depth	14.9 inches	378.7 mm
Height	20.2 inches	512.7 mm
Weight, fully loaded	22 lb	10 kg

FIGURE 2-6 Netra CT 410 Server Physical Specifications

Power Source Requirements

This section provides the power source requirements for your servers.

TABLE 2-4 Power Requirements
Electrical Element	Requirement
Voltage (nominal)	-48 VDC, -60 VDC
Input current (maximum)	14 A
Max. input surge current	17 A

The following are requirements and restrictions apply:

Must be reliably connected to protected earth ground (the battery positive terminal is connected to earth ground)

Can be supplied by one or two power sources, isolated from each other

Must be capable of providing up to 600 watts of continuous power per feed

Is limited to TNV-2, as defined by UL 1950 and IEC 60950

Note - The Netra CT server must be installed in a restricted-access location. Per the intent of the National Electrical Code, a restricted-access location is an area intended for qualified or trained personnel only that has access controlled by a locking mechanism, such as a key lock or an access-card system.

Supply and Ground Conductor Requirements

The following describes the supply and ground conductor requirements.

Suitable conductor material: use copper conductors only

Power supply connections through the input connector: 12 AWG (between the Netra CT server and the source). Three conductors:

-48V (negative terminal)

Chassis ground connection

-48V Return (positive terminal)

System ground conductor: 12 AWG (to be connected to the chassis)

Cable insulation rating: minimum of 75°C (167°F), low smoke fume (LSF), flame retardant

Cable type to be one of the following:

UL style 1028 or other UL 1581(VW-1) compliant equivalent

IEEE 383 compliant

IEEE 1202-1991 compliant

Branch circuit cable insulation color: per applicable National Electrical Codes

Grounding cable insulation color: green/yellow

Overcurrent Protection Requirements

The following are the overcurrent protection requirements.

Overcurrent protection devices must be provided as part of each equipment rack.

Circuit breakers must be located between the power source and the Netra CT server. Use one 20-amp, double-pole, fast trip DC-rated circuit breaker for each power supply unit.

Note - Overcurrent protection devices must meet applicable national and local electrical safety codes and be approved for the intended application.

Caution - External filtering and surge suppression devices might be required on the power feeds where branch circuit electromagnetic characteristics are unknown.

Connecting Logic Ground and Chassis Ground

The Netra CT servers are shipped out of the factory with the logic ground and chassis ground isolated by default. If you want to connect the logic ground and the chassis ground, perform the following steps.

To Connect Logic and Chassis Ground

1. Remove the Netra CT server from the chassis, if you have not done so already.

See To Remove Servers From the Chassis for instructions.

2. Go to the rear of the Netra CT server and locate the two M5 threaded studs on the midplane next to the ground symbols.

3. Remove the two screws and install a grounding plate to connect the two studs (FIGURE 2-7).

This connects the logic ground and chassis ground.

FIGURE 2-7 Installing a Grounding Plate

Cooling Requirements

The Netra CT server is cooled by having air drawn in from the front of the system and exhausted out the rear. You must allow 8 inches (203.2 mm) in front and at the rear of the server to ensure proper cooling. FIGURE 2-8 shows the airflow for the Netra CT 810 server, and FIGURE 2-9 shows the airflow for the Netra CT 410 server.

Both the Netra CT 810 servers and the Netra CT 410 servers have two fan trays. The fan tray for the Netra CT 810 server has a single large fan in each tray, while the fan tray for the Netra CT 410 server has two smaller fans. The fan tray is designed to be hot-swappable. High-speed fans are required to support Netra CP2500 boards.

FIGURE 2-8 Airflow, Netra CT 410 Server (Side View)

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FIGURE 2-9 Airflow, Netra CT 810 Server (Side View)

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Environmental Specifications

TABLE 2-5 Environmental Specifications
Type	Location	Minimum to Maximum Range
Temperature	Operating	-5°C to 45°C (23°F to 113°F)
	Nonoperating	-40°C to 70°C (-38°F to 158°F)
Short term (less than 96 consecutive hrs)	Operating	-5°C to 55°C (23°F to 131°F)
Relative humidity (noncondensing)	Operating	5% to 93% RH
	Nonoperating	93% RH max
Altitude	Operating	0 ft to 13,123 ft (0 m to 4000 m)
	Nonoperating	0 ft to 39,370 ft (0 m to 12,000 m)
Declared noise emissions in accordance with ISO 9296
Chassis w/two Netra CT 810 servers		Sound power LWAd Operating 6.7 B (1B = 10 dB)
		Idle 6.7 B
Chassis w/four Netra CT 410 servers		Sound power LWAd Operating 7.1 B (1B = 10 dB)
		Idle 7.1 B