Industrial Adjustable Output Positive Voltage Power-Supply Kit
(Adj. output 1.25V to 24 VDC) with Heat-Sink
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
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. 9V, 12VDC 24VDC). The Terminal Block TB
connector is included and makes it easy to use.
Board (left) with small Heat-Sink and High current configuration
(right) with large Heat-Sink
The board Available with many
A above shown with maximum configuration
Output DC voltage
Input AC or DC voltage
Output DC voltage Adjustment
via multi-turn trimmer.
above mounted in plastic enclosure (EID-1593 series
enclosure) with din-rail-clip (optional).
and Din-Rail-clip are
(for demonstration only).
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.
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
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 on the board heat sinking, the regulator will shut
Therefore, you will need to mount a heat-sink on
the regulator that is capable of dissipating the access heat
produced. please also note, that the metal body of the
regulators LM317 or LM338
(TO-220 package) is connected internally to the output leg
of the IC (Not to Ground!).