Net Optics iBypass HD - Manual (Page 18)

14
iBypass HD
Management Port
Console Port
Management Port
Console Port
Earth
Ground
-48VDC
Return
-48VDC
Return
Power Source 1
Power Source 2
AC Models
DC Models
Independent Power Sources
Figure 9: Connecting redundant DC power supplies
Caution: ______________________________________________________________________________________________
DC power cables should have a wire gauge of at least 14 and a 72VDC 6A rating.
Always connect the earth grounds first, and keep the earth grounds connected whenever you are working on the device.
When disconnecting the device from DC power, remove the earth ground connections last.
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To connect DC input power on DC models:
1. If you have not already done so, unpack the iBypass HD and verify that you have two appropriate DC power cables.
You also need a Phillips screwdriver to complete the installation.
2. Connect an earth ground lead to the terminal labeled with the ground symbol ( ) on both DC power terminal blocks on
the rear of the chassis. Use the screwdriver to tighten the connections.
3. Connect one of the DC power cables to one of the DC power terminal blocks on the rear panel.
If present, remove the protective cover from the DC power terminal block. Connect the negative (-48VDC) side of
the cable to the terminal labeled with the minus symbol (—) and the positive (0V) side of the cable to the terminal
labeled with the plus symbol (+). Use the screwdriver to tighten the connections.
4. Repeat step 1 for the other DC power cable, connecting it to the remaining DC power terminal block on the rear
panel.
5. Carefully connect the other ends of the DC power cables to two -48VDC power sources.
If possible, turn off the power to the power source while you are making these connections. Be sure to connect the
positive sides of the cables to the positive sides of the power sources, and the negative sides of the power cables to
the negative sides of the power sources.
Installation in a Restricted Access Location in Finland and Norway
Installation in a Restricted Access Location (RAL) is required in Finland and Norway for the iBypass HD. Because
of concerns about unreliable earthing in Finland and Norway, this equipment must be installed in a RAL in these
countries. A RAL is defined as an access that can be gained only by trained service personnel who have been instructed
about the reasons for the restricted access and any safety precautions that must be taken. In these cases, the use of a tool
(such as lock and key) or other means of security is required for access to this equipment.