XP Launches 3 Series of Class II DIN Rail-Mounted Power Supplies
The new low cost devices are aimed at applications in building management and in industrial electronics
Members of XP’s DRC series of power supplies are packaged in low-profile cases, allowing the devices to be placed along with units such as circuit breakers inside consumer unit boxes.
From left to right, members of XP’s DIN Rail mounted DRC30, DRC60 and DRC100 Series. Image courtesy of XP
The DRC30, DRC60 and DRC100 series provide output power levels of 30W, 60W and 100W, respectively. All units from all three series can be powered from 85 to 264 VAC (single phase) or from 120 to 370 VDC.
Within each of the three series, there are devices available offering 12, 15, 24 and 48 volt outputs. Additionally, the DRC30 and the DRC60 series feature versions offering 5 volt outputs.
Class II devices, such as XP’s three new series, do not need an earth ground connection for safety. This is a boon in terms saving on both installation time and costs.
What is a Din Rail?
A DIN Rail is a metal rail used for mounting items such as industrial control devices, circuit breakers and power units inside equipment racks. Always metallic, they may be used to provide chassis grounding but are never used as a busbar to carry current.
The appellation “DIN” refers to Deutsches Institut für Normung, the German standards organization, which is the German the International Standards Organization (ISO) member body.
Important Features of the DRC Series of Power Supplies
All units are certified to EN55032 Class B for conducted and radiated emissions, no additional filtering is required for EMC compliance.
Screw terminals provided for input and output connections make installation easy. A front panel adjuster is provided to increase output voltage to compensate for a voltage drop caused by a long cable run, and a LED indicator provides a clear visual indication that the device is on.
Typical power efficiencies are up to 91%, and there is no minimum output load required for any of the units.
All the members of the three series offer 4kV of input-output isolation and they can withstand an input surge of 300VAC for five seconds. Touch current for members of the DRC30 and DRC60 series, with an input voltage of 264VAC at 60Hz, is 0.25mA (rms). The analogous figure for DRC100 devices is 0.5mA (rms).
Ripple noise (peak-to-peak) for all 12 and 15 volt devices is 120mv, and for all 24 and 48 volt units the figures are 150 and 240mv, respectively. These figures hold true across all three series of the power supplies. For the five volt devices that are part of the DRC30 and DRC60 series, the ripple noise figures are 80mV and 100mV, respectively.
Maximum capacitive loads vary greatly, both between series and among units within each series. Details can be found in the separate data sheets for the DRC30, the DRC60 and DRC100 series.
Other Regulatory Compliances
UL/EN62368-1 safety standards
The units operate over a -40 to +70 °C temperature range. All models derate linearly from +50℃ to +70℃, declining to 50% rated power at 70℃. For temperatures below -30℃ down to the devices’ limit at -40℃, declines vary but they are significant. The details are spelled out in the data sheets
- DRC30: 3.6 x 1.38 x 2.28 inches
- DRC60: 3.6 x 2.04 x 2.28 inches
- DRC100: 3.6 x 2.76 x 2.28 inches