XTC COMMUNICATOR

UM344-2

2.3 LOOP CONNECTION

The MXC is quickly connected into a transmitter loop. A 40" (1m) cable with a dual banana plug on one end and two mini-grabber clips on the other is provided. The dual banana plug is inserted into the bottom of the MXC. The mini-grabber clips are connected to the Model 344's signal terminals or to the loop's current sense resistor, usually at a receiving instrument such as a Model 352 Single -Loop Digital Controller (see notes below). This is a non-polar connection. The MXC can now communicate with the transmitter from the control room or a field location. The diagram below shows a basic loop with the MXC connected at various locations.

NOTE

The HART protocol requires a network (loop) resistance between 250Ω and 1100Ω to support communications. See Section 4.3.5 to determine resistance value.

IMPORTANT

In a hazardous area installation, connect the MXC on the safe side of the barrier, between the current sense resistor and the barrier.

Current Sense

 

 

 

Resistor, 250 to

MXC

 

 

1100 Ohms

MXC

MXC

Controller,

Recorder, + Indicator,

or other _ Device

Signal Test

_ _

+ +

Notes:

Model 344

1.

Connect an MXC to any of the locations shown.

Terminals

X02849S1

2.

Connect the MXC only in a non-hazardous area.

 

2-6

September 1995

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Siemens UM344-2 user manual Loop Connection
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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.

In terms of connectivity, the Siemens UM344-2 supports various communication protocols, including Profibus, Profinet, and Ethernet. This versatility ensures smooth data exchange between the controller and other devices in the automation ecosystem, facilitating comprehensive monitoring and control. The inclusion of these communication standards enhances interoperability and allows for the integration of legacy systems with newer technology.

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.
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