UM344-2

INSTALLATION

4.3.4.1 Point-To-Point Network

Figure 4-4 defines an analog mode Transmitter's operating region for the allowable ranges of supply voltage and network resistance. Perform the following simple calculations to ensure that the power supply output voltage permits the Transmitter to remain within the indicated operating range.

1. Calculate the minimum power supply output voltage.

The minimum network power supply voltage requirement is a function of Network Resistance and full scale current (22.5 mA), and is calculated by the following formula:

Minimum Power Supply Output Voltage = 12 volts + (0.0225 x Network Resistance in ohms)

Power supply output voltage must be greater than the calculated value. The minimum voltage across the input terminals of a Transmitter is 12 volts.

2. Calculate the maximum power supply output voltage.

The maximum network power supply voltage is a function of Network Resistance and zero scale current (3.85 mA), and is calculated by the following formula:

Maximum Power Supply Output Voltage = 42 volts + (0.00385 x Network Resistance in ohms)

Power supply output voltage must be less than the calculated value. The maximum voltage across the input terminals of a Transmitter should never exceed 42 volts.

4.3.4.2 Multi-Drop Network

Perform the following simple calculations to ensure that the power supply output voltage permits the Transmitter to remain within its operating range.

1. Calculate the minimum power supply output voltage.

Minimum network power supply voltage is a function of Network Resistance and the total current draw of all transmitters in the Network, and is calculated by the following formula:

Minimum Supply Output Voltage = 12 volts + [(0.004 x number of transmitters on Network) x (Network Resistance)]

Power supply output voltage must be greater than the calculated value. The minimum voltage across the input terminals of a Transmitter is 12 volts.

2. Calculate the maximum power supply output voltage.

Maximum network power supply voltage is a function of Network Resistance and total current draw of all the transmitters in the Network, and is calculated by the following formula:

Maximum Supply Output Voltage = 42 volts + [(0.004 x number of transmitters on Network) x (Network Resistance)]

September 1995

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Siemens UM344-2 user manual Point-To-Point Network, Multi-Drop Network

UM344-2 specifications

The Siemens UM344-2 is a cutting-edge industrial controller designed to meet the demands of modern automation and control systems. This powerful device is specifically developed for use in various applications, including manufacturing, process control, and machinery integration. The UM344-2 stands out for its versatility and robust performance in harsh industrial environments.

One of the main features of the Siemens UM344-2 is its high processing speed, which allows for real-time data processing and decision-making. The controller utilizes advanced microprocessor technology, ensuring quick response times and efficient operation. Its architecture supports multitasking, enabling it to manage multiple processes simultaneously without compromising performance.

The UM344-2 features a modular design, which provides flexibility in configuration and scalability. Users can easily add or remove modules to tailor the system to specific application requirements. This adaptability is beneficial for businesses that need to scale their operations or adjust to changing production demands. The controller is compatible with a variety of I/O modules, allowing for seamless integration with other equipment and systems.

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The Siemens UM344-2 is equipped with advanced diagnostic tools, which enable users to monitor system performance and detect potential issues in real-time. This feature reduces downtime and maintenance costs by allowing for proactive management of the system. The controller also supports remote access capabilities, enabling technicians to troubleshoot and configure systems from off-site locations.

Safety is a critical consideration in industrial environments, and the UM344-2 is designed with this in mind. It incorporates safety-certified features, ensuring compliance with international safety standards. Users can implement safety functions directly within the controller, streamlining system design and reducing the need for external safety components.

Overall, the Siemens UM344-2 exemplifies the fusion of technology and practical application, making it an essential component for businesses looking to enhance their automation processes. With its high performance, flexibility, and focus on safety, the UM344-2 is a reliable choice for industries aiming for efficiency and innovation in their operations.