Cooper Bussmann BU-905U-L Wireless I/O Installation Manual

Yagi Directional Antennas

Yagi antennas are directional and have positive gain to the front of the antenna and negative gain in other directions. You can use the gain to:

Compensate for coaxial cable loss for transmitter unit; and

Increase receive sensitivity for receiver units.

You should install Yagi antennas with the central beam horizontal and pointed directly in the transmission direction to benefit from the antenna gain.

Note: Yagi antennas usually have a drain hole on the folded element. You should position the drain hole at the bottom when installing the antenna.

You can install Yagi antennas:

Vertically polarized – with the elements in a vertical plane; or

Horizontally polarized – with the elements in a horizontal plane.

The following table shows the recommended installation mode for different situations.

If your installation has …

Cooper Bussmann recommends using …

Two stations both using Yagi antennas

• Horizontal polarization for the stations.

Two or more stations communicating

• Vertical polarization for the stations; and

with a common station

Omni-directional (i.e., non-directional) antenna for the central station.

The following diagram shows the recommended installation for Yagi directional antennas.

3A1580Rev1.6

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Cooper Bussmann BU-905U-L Yagi Directional Antennas, Horizontal polarization for the stations, With a common station

BU-905U-L specifications

The Cooper Bussmann BU-905U-L is a critical component known for its reliable performance in various electrical applications. This fuse is designed to protect circuits from overloads and short circuits, ensuring the safety and integrity of electrical systems in residential, commercial, and industrial settings.

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In terms of electrical ratings, the BU-905U-L is designed to handle a specific voltage and current, which makes it suitable for a diverse range of applications, including motor protection, lighting circuits, and power distribution systems. These fuses come with various current ratings, offering flexibility for different load requirements.

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