Installation ManualH3C SecPath F1000-A Firewall Chapter 3 Hardware Installation3-103.7.2 Connecting a DC-Input PSUI. DC-input PSUDC input power: – 60 VDC to – 48 VDCII. Connecting a DC-input PSUTake the H3C SecPath F1000-A firewall for example.Step 1: Make sure that the PGND is securely connected to the earth ground.Step 2: Make sure that the power switches are placed in the OFF position. Connect oneend of a DC power cord provided with the device to the socket of DC-input PWR0 onthe left-rear of the chassis and the other end to the – 48 VDC power source.Step 3: Repeat Step2 to connect the PWR1. (Skip this step if you use only one PSU.)Caution:Before connecting a DC-input PSU, read the label on the power cord to be used tomake sure that you are using a DC power cord.Step 4: Place the PWR0 switch into the ON position.Step 5: Place the PWR1 switch to the ON position. (Skip this step if you use onlyPWR0.)Step 6: Check that the PWR0 and PWR1 LEDs on the front panel are ON. ON meansthe power connections are correct.Step 7: Check that the SYS LED on the front panel is ON. ON means the hardwaresystem is working well.3.8 Verifying InstallationEach time you power up the firewall during the installation, verify that:z The device has adequate clearance around it for heat dissipation and thetable/rack is stable enough.z The proper power supply is used.z The grounding wire is correctly connected.z The device is correctly connected to other devices, such as a console terminal.