3Com 2900 manual Verifying the Installation, Connecting an RPS DC Power Cord

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Make sure that the PGND cable has been properly connected before powering on the switch.

Connecting an RPS DC Power Cord

The 3Com Baseline Switch 2928-HPWR Plus also supports RPS DC power input with the input voltage ranging from –52 V to –55 V. Follow these steps to install a DC power cord:

Step1 Connect one end of the supplied PGND cable to the grounding screw on the rear panel of the chassis and the other end to the ground as near as possible.

Step2 Keep the upside of the DC RPS plug on top and plug it in the RPS DC receptacle (see callout 1 in Figure 3-15). (If you plug it with the upside down, the insertion is not smooth because of the specific structure design of the RPS DC receptacle and the RPS plug.)

Step3 Use a flat-blade screwdriver to fix the two screws on the RPS plug clockwise to secure the plug to the RPS DC receptacle (see callout 2 in Figure 3-15).

Step4 Connect the other end of the RPS DC power cord to the external RPS power supply system (–54 V/25 A output).

Step5 Check whether the RPS LED on the front panel of the switch is ON. If the LED is ON, it shows the power cord is properly connected.

Figure 3-15Connect an RPS DC power cord to the 3Com Baseline Switch 2928-HPWR Plus

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Make sure that the PGND cable has been properly connected before powering on the switch. The length of the DC power cable must be less than 3 m (9.8 ft).

Verifying the Installation

Before powering on the switch, check that:

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There is enough space for heat dissipation around the switch, and the rack or workbench is stable. The PGND cable is connected.

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Contents

3Com Baseline Switch 2900 Family Environmental Statement Conventions About This ManualOrganization Manual Description Related DocumentationObtaining Documentation Table of Contents Page Product Overview IntroductionPage 3Com Baseline Switch 2920-SFP Plus Power Supply SystemFront Panel Rear Panel3Com Baseline Switch 2928-SFP Plus 3Com Baseline Switch 2952-SFP Plus 3Com Baseline Switch 2928-PWR Plus 3Com Baseline Switch 2928-HPWR Plus Specification PortsConsole Port 10/100/1000Base-T Ethernet PortTransceiver Central Connector Type 1000Base-X SFP InterfaceFiber Max Transmis Sion DistanceRPS Status LED Power LEDLEDs 10/100/1000Base-T Auto-Sensing Ethernet Port Status LED Port Mode LEDPort Ethernet port status Switch model Mode Meaning LED 1000Base-X SFP Interface Status LED Installation Preparations Safety PrecautionsInstallation Site Temperature/HumidityLaser Safety Electromagnetic SusceptibilityDust concentration limit in the equipment room Gas Maximum concentration mg/mInstallation Tools Model Mounting bracket Description Installing a SwitchIntroduction to Mounting Brackets Attaching the Mounting Brackets to a Switch Model Mounting position Description See -6 , FigureMounting the Switch to a Rack Page When a Grounding Strip is Available Mounting the Switch on a WorkbenchConnecting the Pgnd Cable Page When the switch is AC-powered Where a Grounding Conductor Can be BuriedOther Installation Sites Connecting the Power Cord Connecting an AC Power CordVerifying the Installation Connecting an RPS DC Power CordPage Initial Power-On Setting Up the Configuration EnvironmentConnecting the Console Cable RJ-45 Signal Direction DB-9Setting Terminal Parameters Connection Procedure4Set the serial port used by the HyperTerminal connection 6HyperTerminal window Powering On the Switch Booting the SwitchChecking Before Power-On Describes the fields above 2Description on the fields Changing the Boot Mode Enter 9. The system prompts you to change the startup modeEnter Y. The system displays the following information User interface aux0 is available Press Enter to get started Loading Software Approaches for Loading Application and Configuration FilesLoading Files Through the Boot ROM Menu Introduction to the Boot ROM Menu Introduction to Xmodem Loading Files Using Xmodem Through Console PortLoading a Boot ROM file Task Remarks Change the rate of the serial port on the terminalDescription Page 2Properties dialog box 5Transfer menu Restoring the download rate to the default Page Loading Files Using Tftp Through Ethernet Port Introductin to TftpLoad File Name Loading an application file Loading Files Using FTP Through Ethernet Port Introduction to FTPParameters are described in Table 5Description of the FTP parameters Loading an application file Maintenance and Troubleshooting Password LossUser Password Loss Boot ROM Password LossPower Supply Failure With AC power inputWith RPS power input With both AC and RPS power suppliesTroubleshooting when the terminal display is illegible Configuration Terminal FailureTroubleshooting when there is no terminal display