Scenario 4: Installing a Remote Unit in a Network Box
Context
This installation method applies to the S5731-L (except the S5731-L4P2HW-RUA and S5731-L16P2SR-RUA) and S5731S-L (except the S5731S-L4P2HW-RUA and S5731S-L16P2SR-RUA).
- Do not stack the horizontally placed remote units.
- Do not install the remote unit outdoors. Remote units can only be installed indoors.
- It is recommended that power adapters and optical fibers not be vertically installed above remote units.
- Use standard power adapters provided by Huawei to supply power to remote units. Otherwise, the remote units may not work properly or security risks may be introduced.
- Do not route Ethernet cables or power adapter cables outside a network box.
- The remote unit installed in a network box must be operated and maintained by professionals.
- Do not use an enclosed network box and ensure that the air intake and exhaust vents are not blocked to ensure proper heat dissipation of the remote unit.
- If the network box is installed indoors or in a corridor that is free from rain, the network box must meet the requirements of IP31 rating protection. (The first number "3" indicates that the network box can prevent a solid object with the diameter greater than or equal to 2.5 mm from entering the network box. The second number "1" indicates that vertically falling drops shall have no harmful effects.)
- Only one PoE remote unit can be installed in a network box, and a maximum of two non-PoE remote units can be installed in a network box.
- Remote units installed in a network box:
- For a PoE model, the maximum operating temperature of the remote units is 35°C.
- For a non-PoE model, if one remote unit is installed in a network box, the maximum operating temperature of the remote unit is 40°C. If two remote units are installed in a network box, the maximum operating temperature of the remote units is 35°C.
The following figures show space requirements for heat dissipation.
A network box can be installed in concealed (embedded into a wall) or exposed (mounted on a wall) mode. Table 2-6 lists the common network boxes and their application scenarios.
Network Type |
Dimensions (H x W x D) |
Applicable Remote Unit |
|---|---|---|
Concealed installation |
300 mm x 450 mm x 120 mm (11.81 in. x 17.72 in. x 4.72 in.) |
4-port/8-port, power supplied by the power adapter |
300 mm x 400 mm x 120 mm (11.81 in. x 15.75 in. x 4.72 in.) |
||
300 mm x 350 mm x 120 mm (11.81 in. x 13.78 in. x 4.72 in.) |
4-port/8-port, power supplied through the hybrid cable |
|
Exposed installation |
300 mm x 450 mm x 100 mm (11.81 in. x 17.72 in. x 3.94 in.) |
4-port/8-port, power supplied by the power adapter |
300 mm x 400 mm x 100 mm (11.81 in. x 15.75 in. x 3.94 in.) |
||
300 mm x 350 mm x 100 mm (11.81 in. x 13.78 in. x 3.94 in.) |
8-port, power supplied through the hybrid cable |
|
300 mm x 300 mm x 100 mm (11.81 in. x 11.81 in. x 3.94 in.) |
4-port, power supplied through the hybrid cable |
Installing a remote unit in a network box
The method for installing a remote unit in a non-Huawei network box depends on the network box specifications. When a remote unit is installed in a non-Huawei network box, the preceding heat dissipation space requirements must also be observed.
- For an AC power supply system, it is recommended that the PE wire of the AC power cable be used to ground the remote unit. The prerequisite is that the PE wire of the AC power cable in the network box has been properly grounded.
- All devices in a network box are connected to the ground bar through ground cables, and the ground bar is connected to an equipotential terminal in the network box through a metal structure.
- The ground point of a fiber reinforcing rib needs to be connected to a ground bar using a ground cable or to an equipotential terminal in the network box through a metal structure.
- When the PE wire of the AC power cable in the network box cannot meet the grounding requirements, ground the network box through an external ground cable (PGND cable) and ensure that the fiber reinforcing rib is disconnected from the device ground point.
