Cisco 8600 Series Secure Routers Hardware Installation Guide
Explains the installation and removal of DC power supplies, covering procedures for installing DC input power supplies, wiring the DC input power source, and safely removing DC power supplies.
This section describes how to install and remove DC power supplies in Cisco 8600 Series Secure Routers.
To reduce risk of electric shock or personal injury, disconnect DC power before removing or replacing components or performing upgrades.
Do not install the power supplies with the chassis cover off.
This section describes how to install the DC power supply input power leads to the DC input power supply. Before you begin, read these important notices:
The color coding of the DC input power supply leads depends on the color coding of the DC power source at your site. Ensure that the lead color coding you choose for the DC input power supply matches the lead color coding used at the DC power source and verify that the power source is connected to the negative (–) terminal and to the positive (+) terminal on the power supply.
Ensure that the chassis ground is connected on the chassis before you begin installing the DC power supply. Follow the steps provided in the Chassis Ground Connection section.
For DC input power cables, the wire gauge is based on the National Electrical Code (NEC) and local codes for 26 amp service at nominal DC input voltage (–40/–72 VDC). One pair of cable leads, source DC (–) and source DC return (+), are required for each power distribution unit (PDU). These cables are available from any commercial cable vendor. All DC input power cables for the chassis should be 10 gauge wire and cable lengths should match within 10 percent of deviation.
Each DC input power cable is terminated at the PDU by a cable lug, as shown in the below listed figure.
DC input power cables must be connected to the PDU terminal studs in the proper positive (+) and negative (–) polarity. In some cases, the DC cable leads are labeled, which is a relatively safe indication of the polarity. However, you must verify the polarity by measuring the voltage between the DC cable leads. When making the measurement, the positive (+) lead and the negative (–) lead must always match the (+) and (–) labels on the power distribution unit.
To avoid hazardous conditions, all exposed conductors must be covered. If after placing the protective cover over the DC terminal block, conductors are exposed, these should be insulated to prevent accidental contact.
To reduce risk of electric shock, when installing or replacing the unit, the ground connection must always be made first and disconnected last.
If your unit has modules, secure them with the provided screws.
Use a wire-stripping tool to remove approximately 0.75 inch (19 mm) of the covering from the end of the wire.
The wire should be stripped so that it extends into the barrel of the lug without extending out of it. Additionally, the insulation should not be inside the barrel.
The DC power supply has a terminal block that is installed into the power supply terminal block header.