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. 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!).

 

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.

 


 

 


 

Mounting Option

 

 

Note: Use heat-sink (if needed). Additionally, Please be advised heat-sink, Din-Rail mounting clip, wires and transformer are sold as options.

 

 

 

Shown above high-current settings adj. power supply board with heat-sink and wires options.

 

For our line of transformers click Here

 

Description and SKU#

Price

Picture

1.25-24VDC PS, Input up to 30VDC & adj. output  1.25V to +24V low current, w/LM317 TO-220

 

EID-K-VRG-125X-24V-1A-ASM

 

 

 

 

63.99

 

 

 

 

 

1.25-24VDC PS, Input up to 30VDC & adj. output  1.25V to +24V high current, w/LM338 TO-220

 

EID-K-VRG-125X-24V-2A-ASM

 

 

 

 

75.61

 

 

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