Communication-capable Circuit Breakers

WL Circuit Breaker

Supervisory Systems

The WL Circuit Breaker supports the industry standard MODBUS protocol through the COM16 interface.

Communication connections to the COM16 are made through the DB-9 port on the front of the COM16; see Graphic 3-2 for connecting cable pin assignments. Typically the communication wiring from the COM16 will be installed at the factory and run to communication terminal blocks in the switchgear. At these terminal blocks customers can connect twisted shielded pair RS 485 cable to Ethernet Converters, MODBUS Masters, PLCs or supervisory control systems. When the WL Circuit Breaker is installed in Siemens switchgear as part of an ACCESS power monitoring system, the default wiring will be through a Siemens power meter Ethernet gateway or Ethernet converter

connected to a WinPM.Net workstation. For customers with existing MODBUS networks or who require integration into a MODBUS system the following information can be used to develop a software interface to the WL / COM16.

Data in the COM16 is organized in what is referred to as “Datasets”. Each dataset contains a group of functionally common registers. For instance all metered data is organized in a dataset, which consists of 119 registers, min./max. information in another dataset, and diagnostic information in another dataset. In all, the COM16 has a total of 28 datasets, which can be read via communication. Users can take advantage of this structure and ask for blocks of data in one message request, making integration into MODBUS system fast and efficient. The COM16 also

supports pre-configured or standard register maps for simple data interfacing. Users can define what types of data they want in any of three default register sets. Type 1 provides 4 default registers. Type 2 provides 8 registers, and Type 3 provides 14 registers, all in consecutive order for easy requests. The WL is included in WinPM.Net and can be configured remotely using the software or using the remote set-up tool, WL Config.

Each register includes a corresponding status register, which can be read in order to validate the real-time data. This register is referred to as the property byte.

Graphic 3-1Siemens Power Monitoring and control software WinPM.Net communicates to multiple device types using Ethernet, modem and RS 485 serial networks. The integration of the WL Circuit Breaker into WinPM.Net is a key component of totally integrated power.

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WL MODBUS Communication and Electronic Accessories • January 2005

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Siemens UL1066, UL 489 specifications Supervisory Systems
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UL 489, UL1066 specifications

Siemens UL1066 and UL489 are essential components in the landscape of electrical equipment, specifically in circuit protection and control. These standards ensure reliability, safety, and efficiency in various applications, including industrial, commercial, and residential settings.

The Siemens UL1066 is primarily focused on disconnect switches. These devices are designed to isolate electrical circuits, ensuring the safety of both personnel and equipment during maintenance or in case of faults. One of the key features of UL1066 disconnect switches is their high breaking capacity, enabling them to handle significant fault currents without failure. This characteristic is crucial in protecting downstream equipment from damage caused by short circuits. The UL1066 switches are also known for their robust construction, often featuring a metal enclosure that enhances durability and environmental resistance. Additionally, these switches can be operated manually or remotely, offering flexibility in operation and control.

On the other hand, Siemens UL489 circuit breakers provide comprehensive protection against overcurrents and short circuits. These devices not only interrupt fault currents but also protect connected devices from damage due to overload situations. Key features of UL489 circuit breakers include adjustable trip settings, which allow users to customize the response to overcurrent conditions based on specific application requirements. This adaptability makes them suitable for a wide range of environments, from large industrial plants to smaller commercial buildings.

Both UL1066 and UL489 products are constructed with advanced technologies, such as thermal-magnetic or electronic trip mechanisms in UL489 devices, ensuring precise and timely interruption of fault currents. These technologies promote energy efficiency and stability within electrical systems. In addition, many of these devices are equipped with indication features, providing clear visual status cues for quick assessment in emergency situations.

In terms of characteristics, both UL1066 and UL489 devices adhere to rigorous testing and certification processes to meet UL standards. This compliance assures users of their performance and reliability. Furthermore, the devices are designed to accommodate a wide range of operating temperatures and environmental conditions, making them versatile choices for various applications.

In summary, Siemens UL1066 and UL489 devices are paramount in ensuring safety and efficiency in electrical circuits. Their advanced features and robust construction make them indispensable in protecting both personnel and equipment in an array of industrial and commercial applications.
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