Communication-capable Circuit Breakers

The MODBUS COM16 Module and the BSS

WL Circuit Breaker

The COM16 module enables the WL Circuit Breaker to exchange data via MODBUS to supervisory systems and MODBUS masters. The COM16 module retrieves some of the key data on the status of the circuit breaker (circuit breaker open/closed, closing spring charged, ready-to- close, etc.) via the CubicleBUS from the BSS (breaker status sensor). Both modules are, therefore, offered together as

a MODBUS communication package.

MODBUS Module COM16

The COM16 module for the WL enables the circuit breaker to be connected to any MODBUS master network. This makes it easy to add WL and a COM16 to existing MODBUS networks.

If required, control/write access to the circuit breaker can be locked using hardware and software to prevent any switching operations

taking place via MODBUS (manual or automatic operation) or parameters from being changed.

All key events are assigned a time stamp from the integrated clock to enable operators to keep track of alarms. This device clock can be synchronized with the clock in the automation system.

A temperature sensor integrated in the COM16 module measures the temperature surrounding the breaker in the switchgear cubicle.

Three integrated microswitches located in the COM16 module are used to detect the position of the circuit breaker (connect, test, disconnect and not present) and communicate via MODBUS. The circuit breaker can be remotely operated only in the test or connect position.

Pin Configuration

The COM16 module is connected to the auxiliary conductor plug-in system at X7.

The electrical connections to the circuit breaker and the CubicleBUS connection to the internal CubicleBUS modules (ETU, BSS, metering function, etc.) are defined in Section 9 of the Operator's Manual and the individual instruction sheets.

Interposing relays must be used if the opening and closing solenoids are designed for voltages other than 24V DC.

Terminals X9.1 and X9.2 must be used if the second shunt trip rather than the first shunt trip is used to open the circuit breaker via communication.

The unassigned user output can be used as required and must be connected in the same way as a coupling device (see Graphic 2-4). It can be used, for example, to reset the trip indicator if the remote reset option has been installed. As with Open and Close, only voltages of up to 24V DC are permitted (note the polarity); coupling devices must be used for higher voltages.

The communications line is connected to the 9-pin interface on the front of the COM16 module. The CubicleBUS connection for a RJ45 plug is located at the rear and is used to connect the external CubicleBUS modules. If no external CubicleBUS module is connected, the terminating resistor supplied must be used as an RJ45 plug.

The unassigned user input can be connected using a contact element with the 24V DC from pin 1 to transmit the status of the contact element.

Graphic 2-2The text on the COM16 module shows the external pin configuration for connecting the closing solenoid and the shunt trips, as well as the MODBUS write protection function and the unassigned input/output.

2/8

WL MODBUS Communication and Electronic Accessories • January 2005

Page 19
Image 19
Siemens UL 489, UL1066 specifications Modbus COM16 Module and the BSS, Modbus Module COM16, Pin Configuration

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.