The u-remote family from Weidmüller is established on the market and now includes the I/O modules “UR20-8DI-ISO-2W” and “UR20-4DO-ISO-4A”, which receive galvanically isolated input and output signals. u-remote is an element of the u-mation automation and digitalisation portfolio.
Interferences are common on decentralised machines and production lines, process plants as well as marine and offshore applications, due to ground loops or line-induced field influences. The reasons for this are long cable distances and complex networks. In these kinds of applications, it is difficult to avoid connecting shieldings several times, therefore cable loops are formed. Even if all interfering influences were minimised during commissioning, these occur at the latest when carrying out upcoming extensions or repairs. If one of the shields is damaged, a shield connection is not completely planar or oxidised, the induced interference fields immediately affect the signal and data transmission. There are also an increasing number of internal sources of interference, such as frequency convertors and lighting equipment. With galvanically isolated input and output signals, these kinds of interferences can be effectively limited or even completely avoided. Ideally, they will remain below the limit value therefore will not impact upon the system’s function. However, if interferences do occur, the source of the error is easy to find. For these kinds of applications, Weidmüller has developed the new “UR20-8DI-ISO-2W” and “UR20-4DO-ISO-4A” I/O modules. Thanks to the galvanic isolation of min. 500 V between the channels and the system, this enables uninterrupted operation, even in loaded applications. The channels are protected against mutual interference and also against external disturbances.
The “UR20-8DI-ISO-2W” digital input module can receive up to eight binary control signals using two-wire technology. The “UR20-4DO-ISO-4A” digital output module enables up to four actuators to be controlled via four outputs using two-wire technology, with up to 4 A DC or 2 A AC and up to 48 V AC/DC. With both modules, there is a separate status LED on each channel, to keep the user on site informed of the operating status at all times. This provides a high output density with maximum flexibility. With just 11.5 mm width, the new modules meet the requirement for compact and space-saving automation solutions, and are thus the ideal addition to the u-remote product family.
Weidmüller at the SPS 2019: Hall 9, Booth 351
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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 .