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Adjustable Output Positive Voltage Power-Supply Kit (Adj. output 1.25V to 24 VDC) is an OEM electronics power supply board that allows you to connect up to 30V AC or DC on one side of the board and get adjustable DC voltage (VDC) regulated on the other side. Every facility should have a few of these boards handy. The boards will allow you to easily power all your HVAC controller, interface board and low-voltage equipments components (i.e. 0-10V, 12VDC 24VDC). The Terminal Block TB connector is included and makes it easy to use.
Standard Board With optional high-current configuration
Some of the features of the PS (LM317) include: 1% output voltage tolerance, max. 0.01%/V line regulation, max 1A output current, adjustable output down to 1.25V, current limit constant with temperature, 80 dB ripple rejection, output is short-circuit protected.
The board includes protection diode prevent capacitors from discharging thru the regulator during an input short circuit.
Heat sinking block is usually require when pulling current > 400mA (optional). Heat sink are manly manufacture from Aluminum material.
Final
Note:
As a general rule the input voltage should be limited to 2 to 3 volts
above the output maximum voltage. The board can handle up to 36
volts input, be advised that the power difference between the input
and output appears as heat. If the input voltage is
unnecessarily high, the regulator will overheat. Unless
sufficient heat dissipation is provided through heat sinking, the regulator will shut
down.
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Please drop us a line at hvac@eidusa.com and let us know where you use this unique adjustable power supply board. Or, of course, if you have any adjustments deemed important--and one of our engineers will be happy to help you achieve them.
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