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Manual Chapter: Guidelines for DC Power in the VIPRION
Manual Chapter
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The VIPRION platform is available with DC power supplies. This document describes how to power these platforms.
This document assumes that you have followed the instructions provided with the platform in the guide Setting Up the VIPRION Platform. The chassis should be installed in a rack and have at least one blade installed.
Warning: Before you begin to work with one of these platforms, refer to the environmental warnings provided in the section of this document called Guidelines for DC-powered equipment. You should also review any safety requirements defined by your network operations center (NOC).
There are detailed guidelines for installing the platform in a rack described in the guide Setting up the VIPRION Platform. Please follow the guidelines described in this guide to install a DC powered VIPRION platform in a rack.
This power supply does not have an on/off switch. You can control the power from the rack switch or the DC power source.
Note: The VIPRION platform must be installed in a restricted access location such as a central office or customer premises environment.
Note: You should coat bare conductors with an appropriate antioxidant compound before you make crimp connections. You should bring all unplated connectors, braided strap, and bus bars to a bright finish and then coat them with an antioxidant before you connect them.
In addition to the equipment supplied with the standard AC platform, the DC platform requires some additional equipment for installation and wiring. The following additional equipment is supplied with the platform.
There are some other pieces of equipment you may need that you need to supply. You need to supply the following additional equipment.
Each blade has a metal plate that is screwed to the electronics in multiple places to the ground plane of the board. The front plate of the blade is also screwed to this plate when you tighten the screw lock assemblies to the chassis. The entire system is directly connected to the metal chassis and the ground connection is also directly connected to the chassis.
Do not secure multiple bonding or grounding connectors by the same bolt. The grounding connectors do not need to be removed to perform service or installation procedures. You can connect other bonding or grounding conductors to a grounding connector provided a reliable bond between the connector and the equipment is not disturbed during installation, service, or maintenance of the platform.
Important: All copper grounding cable compression-type terminal lugs used for grounding must meet all appropriate UL standards.
1.
After the unit is installed in the rack and before you provide power to the system, you need to connect the grounding hardware.
2.
Use the Molex crimping tool to crimp the ground wire to the two-ring grounding terminal lug.
F5 Networks recommends using a 2 AWG copper wire for grounding.
4.
Install the 5/16-18 Keps nuts on the ground terminal lugs.
Use between 16 to 18 lb.-in. of torque on these nuts.
After the platform is installed in a rack, you can wire the platform to the DC power source. This section describes how to connect the DC power source. When you connect the DC power source, F5 Networks recommends that you follow the safety requirements defined for your network operations center (NOC).
There are two groups of terminals on the back of the chassis. When you view the chassis from the rear, there is one on the left side and one on the right side. Each terminal group contains the leads for two power supplies.
Use the group of leads on the right rear of the chassis labeled PWR 2 and PWR 1 for power supplies 2 and 1.
Use the group of leads on the left rear of the chassis labeled PWR 4 and PWR 3 for power supplies 4 and 3.
Figure 6.2 on the following page shows the terminal layout of the DC power supply wiring block on the back of the platform.
1.
After you are sure the power is off, and the ground lug is connected to the ground terminal, you can connect the DC power source.
2.
After you connect the ground lug, connect the negative DC power lead to the -48V terminal on the terminal block plug.
The terminals are clearly labeled. You should strip at least 0.50" of insulation off of each wire where you connect the wire to the terminal block plug.
3.
Connect the positive DC wire to the RTN terminal on the terminal block plug.
You should strip at least 0.50" of insulation off of each wire where you connect the wire to the terminal block plug.
5.
Plug each terminal block plug into the plug on the back of the chassis.
Use the screws supplied to attach each wiring block to the plug in the chassis. Use between 16 to 18 lb.-in. of torque on these screws.
6.
Turn on the DC power source.
The system begins to boot up.
This section describes the power provisioning recommended for the VIPRION platform with different blade configurations. Figure 6.2 shows the number of power supplies required depending on the number of blades installed in the chassis and the maximum system power draw. These measurements were taken with PB100N blades, four power supplies, and within the standard temperature range. N is the number of additional power supplies for redundancy.
Warning: The intra-building interfaces of this platform, including Ethernet, are suitable for connection to intra-building or unexposed wiring or cabling only with shielded and grounded cables at both ends. The intra-building ports of the equipment must not be metallically connected to interfaces that connect to the outside plant (OSP) or its wiring.
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