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

Status Outputs

The unit contains the following status outputs:

•System OK;

•Setpoint Output; and

•Communications Failure.

Status outputs are FET output to common rated at 30Vdc 500mA.

Connect the output circuit to the appropriate Status Output terminal. Each status output circuit is associated with an LED indicator that lights lit when the digital output is active.

The following table details the status output behavior:

 

 

Status Output

LED

LED Status

Description

System OK active (both modules)

OK

Green

No fault detected

System OK inactive

OK

Red

• Internal fault detected.

 

 

 

• Supply voltage Low

 

 

 

• Analog Loop supply overloaded

Setpoint Output (BU-905U-L-T)

SP

Green

Local setpoint attached to 4-20mA analog input.

Communications Failure (BU-905U-L-R)

CF

Red

Watchdog alarms active on digital outputs or analog outputs.

Analog Input

The BU-905U-L-T module provides one 0-20mA DC analog input for connecting to instrument transducers (e.g. level, moisture, pressure transducers, etc.).

Note: The BU-905U-L-T module inputs measure down to 0mA and can also be used for zero based signals (e.g., 0-10mA).

The analog input has a positive and negative terminal and can be placed at any point in the current loop, providing neither input rises above the 24 volt Analog Loop Supply level.

Each input has a loop resistance of less than 250 ohms and zener diode protection is provided against over-voltage and reverse voltage. Note: You may require additional protection in high voltage or noisy environments or for long wiring runs.

A 24Vdc loop supply is available on the BU-905U-L-T module for powering the analog transducer loops. In this situation, connect the:

•Analog loop - between an Analog Input (-) terminal and Ground.

•Positive terminal – i.e., Analog Input (+) to the +24V Analog Loop Supply.

Externally powered loops may be connected by connecting the input between "Analog Input (+)" and “Analog Input (-)” Common mode voltage may be -0.5V to 27V.

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Cooper Bussmann BU-905U-L installation manual Status Outputs, Analog Input
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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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