- play_arrow Overview
- play_arrow Appliance Overview
- play_arrow Chassis
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- play_arrow Site Planning and Specifications
- play_arrow Site Preparation
- play_arrow Rack Requirements
- play_arrow Power Requirements
- play_arrow Compliance
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- play_arrow Installation and Configuration
- play_arrow Installing the Appliance
- Tools and Parts Required to Install the Junos Space Appliance
- Unpacking the JA2500 Junos Space Appliance
- Mounting the JA2500 Junos Space Appliance
- Front-and-Rear Mounting the JA2500 Junos Space Appliance Flush to a Rack
- Front-and-Rear Mounting the JA2500 Junos Space Appliance Recessed in a Rack
- Midmounting the Junos Space Appliance in a Two-Post Rack
- play_arrow Connecting the Appliance
- play_arrow Performing Initial Configuration
- Booting the Junos Space Appliance
- Configuring a Junos Space Appliance as a Junos Space Node
- Configuring a Junos Space Appliance as a Standalone or Primary FMPM Node
- Configuring a Junos Space Appliance as a Backup or Secondary FMPM Node for High Availability
- Installing a Junos Space Image on a Junos Space Appliance by Using a USB Drive
- Powering Off the Junos Space Appliance
- play_arrow Changing Network and System Settings
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- play_arrow Maintenance and Replacing Components
- play_arrow Replacing Components
- Installing and Removing JA2500 Junos Space Appliance Hardware Components
- Replacing the AC Power Supply Cord on a Junos Space Appliance
- Replacing the AC Power Supply Module on a Junos Space Appliance
- Replacing the DC Power Supply Cable on a Junos Space Appliance
- Replacing the DC Power Supply Module on a Junos Space Appliance
- Replacing the Fan on a Junos Space Appliance
- Replacing the Hard Disk on a JA2500 Junos Space Appliance
- play_arrow Maintenance
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- play_arrow Troubleshooting
- play_arrow Troubleshooting Procedures
- play_arrow Monitoring the Appliance
- play_arrow Returning Hardware
- Returning a JA2500 Junos Space Appliance or Component for Repair or Replacement
- Locating the Serial Number on a JA2500 Junos Space Appliance or Component
- Contacting Customer Support to Obtain Return Materials Authorization for Junos Space Appliances
- Packing a JA2500 Junos Space Appliance or Component for Shipping
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DC Power Electrical Safety Guidelines
A DC-powered device is equipped with a DC terminal block that is rated for the power requirements of a maximally configured device.
Note:To supply sufficient power, terminate the DC input wiring on a facility DC source that is capable of supplying a maximum inrush current of 30 A at power-up
Incorporate an easily accessible disconnect device into the facility wiring. Be sure to connect the ground wire or conduit to a solid office earth ground. A closed loop ring is recommended for terminating the ground conductor at the ground stud.
Run two wires from the circuit breaker box to a source of –48 VDC. (The range supported by the DC power supply is –45 VDC to –60 VDC.)
A DC-powered device that is equipped with a DC terminal block is intended only for installation in a restricted access location. In the United States, a restricted access area is one in accordance with Articles 110-16, 110-17, and 110-18 of the National Electrical Code ANSI/NFPA 70.
Note:Primary overcurrent protection is provided by the building circuit breaker. This breaker must protect against excess currents, short circuits, and earth grounding faults in accordance with NEC ANSI/NFPA 70.
Ensure that the polarity of the DC input wiring is correct. Under certain conditions, connections with reversed polarity might trip the primary circuit breaker or damage the equipment.
For personal safety, connect the green and yellow wire to safety (earth) ground at both the device and the supply side of the DC wiring.
The marked input voltage of –45 VDC for a DC-powered device is the nominal voltage associated with the battery circuit, and any higher voltages are only to be associated with float voltages for the charging function.
Because the device is a positive ground system, you must connect the positive lead to the terminal labeled RTN, the negative lead to the terminal labeled –45 VDC, and the earth ground to the device grounding points.
