Cooper Bussmann BU-905U-L Installing and Earthing Antennas, Omni-directional Antennas

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

NOTE:

1.Cooper Bussmann recommends using the 905U-G module as a repeater unit between BU-905U-L-T and BU-905U-L-R modules.

2.To use a repeater unit, the BU-905U-L modules and the repeater module must be configured using the supplied configuration software. The factory default configuration described in the Quick Start Guide cannot use a repeater unit.

Installing and Earthing Antennas

You must connect an antenna to each BU-905U-L module using the SMA connector at the top of the enclosure.

Cooper Bussmann recommends carefully taping the connections between the antenna and coaxial cable to prevent moisture ingress. Moisture ingress in the coaxial cable is a common cause of radio system problem as it greatly increases the radio losses.

Cooper Bussmann recommends taping the connection with three layers of tape:

Layer Tape

1PVC tape.

2Vulcanizing tape (e.g. 3M 23 tape).

3Additional layer of PVC UV-stabilized insulating tape.

The first tape layer lets you easily inspect the joint if required as you can easily remove the Vulcanizing seal.

Note: You must effectively earth all masts for mast-mounted antennas to avoid lightning surges. We also recommend using a coaxial surge diverter for antennas mounted outside industrial plant environments.

If the antenna is not already shielded from lightning strike by an adjacent earthed structure, you can provide shielding by installing a lightning rod above the antenna.

You should connect the antenna to the module using 50 ohm coaxial cable (e.g. RG58 or RG213) terminated with a male coaxial connector, The higher the antenna is mounted, the greater the transmission range; however as the length of coaxial cable increases so do cable losses. For use on unlicensed frequency channels, there are several types of antenna suitable for use.

If you mount antennas on elevated masts, you should effectively earth the masts to avoid lightening surges. The BU-905U-L radios are fitted with surge protection.

Note: For high lightening risk areas, Cooper Bussmann recommends additional surge suppression devices. If the antenna is not already shielded from lightening strike by an adjacent earthed structure, you can install a lightening rod to provide shielding.

Omni-directional Antennas

This section contains important information for using dipole and collinear antennas. For more information, see the next sections.

Dipole Antennas

Unity gain dipole antennas are commonly used on unlicensed channels. The dipole antenna does not provide any gain, so the power transmitted from the antenna is the same as the power out of the module.

A dipole antenna that comes supplied with integral 15 ft cable does not require additional coaxial cable.

You should mount dipole antennas vertically, preferably no less than 1 metre away from a wall or mast for maximum performance.

Collinear Antennas

Collinear antennas transmit the same amount of radio power in all directions horizontally, and are easy to install and use. They provide gain by compressing the radiated signal to a flattened disc shape, and reducing the amount of signal radiated above and below the horizontal plane.

Collinear antennas are generally used at a central site with more than one remote site, or at a repeater site.

Collinear antennas are similar in appearance to dipole antennas; however the antenna is longer.

Collinear antennas are supplied without cable, and require additional coaxial cable.

You can use collinear antennas to:

•Transmitter – to compensate for the losses in long lengths of coaxial cable.

•Receiver – to increase receive sensitivity.

3A1580Rev1.6

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Contents Cooper Bussmann BU-905U-L Wireless I/O Installation Manual Cooper Bussmann Application Engineering ContentsSafety Information FCC Notice Safety InformationFCC Notice when used in USA 905U Wireless I/O Module Industry Canada BU-905U-L Wireless I/O ModuleSection Read this section if you want to Installing Your UnitSpecifications Know technical information about your unit About This DocumentTransmitter Unit Unit Components and ConnectionsIndicates Receiver Unit Button Pressed PG LED on Configuration Cable Connected Output LED onSignal Strength LEDs with Rssi PushSupported Antennas Installing the AntennaAustralia/NZ 20+ km Radio Transmission DistancesRG58 RG213 Cellfoil Area Distance Additional information USA/Canada 20+ milesCollinear Antennas Installing and Earthing AntennasOmni-directional Antennas 3A1580Rev1.6 With a common station Yagi Directional AntennasHorizontal polarization for the stations Vertical polarization for the stationsInstalling the Power Supply Inputs and Outputs Digital InputsConnection Method Voltage free contact Active 0-5v signal deviceRelay Outputs Important Safety InformationStatus Output Status OutputsAnalog Input Wire Transducer Current Source Output Current sink output Thermocouple InputPassive transistor Active pulse device Pulse InputMinimum on time Analog Output Installing and Configuring the Unit Installing the UnitSends Configuring Your UnitsSignals Sent Over Radio Other SignalsTesting Your Units Receiver Unit Unit SpecificationsTransmitter Unit Parity No parity Signal Name Normal ColorAncillary Hardware Reference Information RS232 Serial CableReceiver ConfigurationIndex ConnectionsCooper Bussmann BU-905U-L Wireless I/O Installation Manual Customer Assistance

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.

One of the main features of the BU-905U-L is its high breaking capacity, which allows it to effectively interrupt excessive current flow without damaging connected devices. This feature makes it suitable for use in demanding environments where reliable protection is crucial. The fuse is built to handle transient events, making it ideal for applications subject to short bursts of high current.

The fuse utilizes advanced materials and technologies to enhance its durability and efficiency. Its construction includes a robust, non-combustible housing that offers excellent thermal resistance and mechanical strength. This ensures the fuse can withstand harsh operating conditions while maintaining its protective capabilities. The BU-905U-L is also designed for quick and easy replacement, minimizing downtime during maintenance.

Another significant characteristic of the BU-905U-L is its thoughtful design for ease of installation. It features a standard size that is compatible with various fuse holders, allowing for a seamless integration into existing systems. Additionally, the fuse is marked with clear ratings, enabling users to quickly identify its specifications for proper selection and installation.

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.

Moreover, built on a commitment to safety and quality, Cooper Bussmann ensures that the BU-905U-L meets stringent industry standards and certifications. This not only guarantees the reliability of the product but also provides peace of mind to users knowing that their electrical systems are well protected.

In summary, the Cooper Bussmann BU-905U-L fuse combines high performance, advanced material technology, and user-friendly characteristics, making it an invaluable component in any electrical system. Whether for industrial machinery or everyday electrical circuits, this fuse provides essential protection, ensuring safety and reliability in energy management.
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