With Siwarex DB, Siemens is launching a digital junction box for weighing applications with robust field housing in IP66 protection on the market. It can be integrated easily into Simatic environments. The Siwarex DB extends the Siemens weighing technology portfolio and through its seamless networking ensures that individual analog load cells can now be acquired and evaluated more comprehensively than ever before. They can be used both for the targeted monitoring of weighing processes and for extended diagnostics. Any error messages are displayed centrally on the Simatic controller and the HMI.
The seamless connection of the control unit and Siwarex WP weighing electronic enables immediate diagnostics of the load cells. This makes servicing quicker and easier, and minimizes downtimes. In order to prevent inaccurate or incorrect measurements, the weighing modules must operate precisely. An essential requirement for this is complete transparency regarding the status of the devices. Siwarex DB offers the option of connecting the scales with up to four load cells, thus providing the required flexibility in plant planning. A new feature is the single-channel monitoring of each connected load cell. For example, error conditions such as wire break or overload can be detected and removed specifically, making servicing easier. With Siwarex DB, the use of a multimeter is a thing of the past. Siwarex DB can also be used in a wide range of applications in the field of industrial weighing technology, such as level monitoring, silo or container weighing.
By using a Siwarex WP231 as the weighing electronic, direct connection to a Simatic S7 CPU for the Simatic S7-1200 system is supported. For the distributed Simatic ET 200SP system, on the other hand, the use of Siwarex WP321 is recommended. Seamless communication between Siwarex and Simatic reduces effort during commissioning. If, for example, height compensation is required during commissioning, the load of each individual load cell can be viewed immediately using the Siwarex WP weighing electronics.
The Siwarex DB digital junction box can be used to retrofit existing plants with minimal effort. If the similar Siwarex JB solution is already in use, it can be simply replaced with the Siwarex DB (which has the same dimensions) and connected to the existing cables. Another advantage for the user is that there is no change to the normal operating procedures within the Siwarex weighing electronics and Simatic.
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Power Supply Product
Bi-directional DC-DC converter series has extended voltage
TDK Corporation (TSE 6762) announces the introduction of the EZA2500W-32048 TDK-Lambda brand bi-directional DC-DC converter model to its EZA series. The extended high voltage range now covers 260 to 400Vdc and the lower voltage 36 to 65Vdc. The operating temperature has been increased to -10 to +50°C. Double sided protective board coating and long-life dust resistant fans have also been included.
Designed for energy storage systems with rechargeable batteries, this 2500W digitally controlled, compact 1U power supply can seamlessly change conversion direction from high voltage dc sources, powered by solar or wind, to 48Vdc batteries and vice versa. Other applications include lithium-ion battery testing as well as the use of regenerated energy from robots, cranes, autonomous ground vehicles and lifts. The EZA2500 can be used to replace large power resistors currently used for lift braking and use that previously dissipated energy to charge batteries. That stored energy can be used to either provide peak power for high torque demands or as battery back-up for power cuts.
The output voltage and current can be programmed and monitored using the RS-485 communications port. Multiple units can be operated in parallel by using the RS-485 interface to set units for “droop mode” current share. Alarm signals are also accessible, as well as remote on/off and under/over voltage functionality. The high voltage (grid) to low voltage (battery) isolation is 3,000Vac, grid to ground 2,000Vac and battery to ground 500Vac.
The dimensions for the EZA2500 are 43.6mm (1U) high, 423mm wide and 400mm deep. All models in the EZA series are certified to the IEC/EN/UL 60950-1 and IEC/EN/UL 62368-1 safety standards with CE marking for the Low Voltage, EMC and RoHS Directives. A five-year warranty is standard.
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Industry 4.0 progress
In an ordinary year, PI (Profibus & Profinet International) would already – and once again – have presented its progress on Industry 4.0 work at the Hanover Fair – but this is no ordinary year. Nevertheless, the working group experts are working tirelessly on implementing concepts like the use of Profinet over TSN, fail-safe machine-to-machine communication and information models for vertical communication – virtually and at a safe distance, of course.
Obviously, this is not an easy time for an organization which has committed itself to the networking of automation systems, and especially also those of technical experts. PI has been part of the digital transformation from the very beginning, though, which makes it ideally equipped for this situation. This being the case, it is no wonder that the working groups chose to continue developing their concepts. Online meetings and processes have been part of everyday work at PI for many years, enabling effective and easy cooperation. To share this progress with Profinet users as well, PI is now implementing a number of different virtual methods of communication.
The focal point of this communication is the PI website, www.profibus.com/I40, where “Industry 4.0” is being rolled out again in its entirety. PI is focusing on the highlights of its Industry 4.0 work here, beginning with Profinet over TSN, OPC UA Safety and vertical communication. Additional concepts will be addressed and added successively over time. PI won’t just be providing an overview of the technology and leaving it at that – technical details on solutions and use cases for applications will be added as well. This gives device manufacturers and users solid information for their own implementation of Industry 4.0-compliant integration.
In addition to this digital content, PI will also be visualizing the Industry 4.0 workshop to enable discussion with users and enter into dialog in these trying times – times which everyone at PI hopes will be over soon. Regardless, the working groups will continue to work hard on implementing Industry 4.0, in keeping with the motto: Go digital. Go Profinet .