Important Factors to Consider When Buying a DIN Rail System
DIN rails are one of the most convenient means for mounting electronic and electric devices in a neat and compact matter. They're frequently used for mounting circuit breakers, power supplies, terminal strips and all other kinds of industrial control equipment within enclosures, which allows for a combination of devices to be mounted next to each other to meet your application-specific system requirements. The main advantage of DIN rails is the time-saving they offer on installation, since all you need to do is just snap them onto metal rails. Using DIN rails, you can quickly put together a well-organised configuration that provides safety, flexibility and high density.
There are three types of DIN rail systems, Top Hat DIN rails, which comply with DIN 46277-3, BS 5584 and EN 50022 and are available with 15mm or 7.5mm depth. G Section DIN rails, which comply with DIN 46277-1, BS 5825 and EN 50035, and C Section DIN rails which are available as types C50, C40, C30 and C20, where the number represents the rail['s height in millimetres. That being said, the first thing to consider when shopping for DIN rails is whether they're compatible in terms of dimensions and styles with your power supply.
Further, you need to consider whether the DIN rail system has fixed or adjustable output voltage. Adjustable DC voltage output is oftentimes the more desirable option, and in some cases, it's essential. However, some applications actually prefer a fixed DC voltage output for the sake of stability and smooth operation. For instance, many LED lighting installations operate better with a fixed DC voltage to ensure that surges, changes to the current, fluctuations and outages don't affect the LED output. You'll find fixed DIN rail power supply 24VDC or 48VDC systems that have over 90% input. Again, you have to consider your voltage requirements before you pick between a DIN rail power supply 24VDC or 48VDC system.
And lastly, you need to consider the connection and wiring of the system. This is especially important for loads of more than a couple of tens of mA, where the cabling between the load and the power supply needs to be kept as short and as large in CSA (cross-sectional area) as possible. This is necessary in order to minimise cable heating and reducing the voltage across the load terminals. Additionally, this is important for minimising noise radiation. The neutral and live AC input lines should be separate from the - and + DC output pair in order to minimise noise induction, and the DC and AC pair should be twisted for the same reason.
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