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Series on “Permanently supplied”

Playing it safe, twice over, with redundancy, smooth operation thanks to uninterruptible power supply, and safe bypasses with buffer modules

 

Part 1 Playing it safe, twice over, with redundancy

Initial situation

Increasing production quality and plant availability are the drivers for continuously optimising production procedures. This is coupled with an increasing level of automation, which in turn brings with it new challenges in ensuring a reliable 24 V DC power supply.

Solution

As an industrial connectivity partner, Weidmüller provides versatile solutions which meet all the increases in requirements by interconnecting high-availability switched-mode power supply units with practical supplementary modules. One solution is the systematic establishment of a redundant supply.
 
 

Part 2 Smooth operation thanks to uninterruptible power supply

Initial situation

More than 200,000 registered power outages lasting more than three minutes were recorded in Germany in 2010 alone. Short outages of typically 200 milliseconds occur even more frequently. Added to this is the fact that switching operations in company-internal networks can lead to interruptions or voltage drops when, for example, very large consumers are switched on. The consequences are expensive data losses, restarts of machinery or even damaged tools and products owing to the uncontrolled restart.

Solution

The new UPS control unit combined with a battery module was specially designed for bridging prolonged power outages. With the Weidmüller solution, modern battery management and the integrated temperature sensor in the battery ensure an optimum charging and service life of the battery. Depending on specific requirements, the battery modules can supply up to 40 amps for 30 minutes or 1 amp for 30 hours.
 
 

Part 3 Safe bypasses with buffer modules

Initial situation

Be they switching operations in the company’s own network or weak low-voltage networks – the causes for short-term interruptions are diverse, and the effects always a nuisance. For example, mains feedback within a fully automated welding line can cause extensive damage: from costly data losses, machine restarts and damaged product parts, to undefined system statuses.

Solution

The zero-maintenance Weidmüller buffer modules, which bridge 20 amps in 260 milliseconds, are perfect for use in applications such as these that are affected by continually high pulses, which can cause faults in the plant network. Two devices can also be switched in parallel to increase the current or buffer time. The modules can be easily looped into the current path between the switched-mode power supply unit and secure load, so they’re not just easy to plan, but can also be quickly retrofitted at any time.

 

Published in November 2013