User Instructions

DC/DC20SD

v.1.0

DC/DC 2A Step down DC/DC converter

with adjustable output voltage

EN**

Edition: 4 from 12.10.2017

Supercedes the edition: 3 from 11.02.2016

The module’s features:

 Step down DC/DC converter with adjustable output voltage

 Example of use: step down from 24V to 12V DC

 The input voltage range: 8÷28V DC

 The output voltage range: 4,5÷19V DC

 The minimum difference between input (lowered) and output

voltage: 3V

 The maximum load current 2A (24W)

 The PSU technical output indicating converter failure

triggered by:

 Short-circuit of the output

 Output overload

 Protections:

 Short-circuit protection SCP

 Overload protection OLP

 OHP overheating protection

 High efficiency: 80÷90%

 Optical LED indication

 Warranty – 2 years from the production date

 Mounting:

 Mounting strip with adhesive tape

 Mounting screws

Example of use of the DC/DC20SD step down DC/DC converter with adjustable output voltage.

Schematic diagram of the converter operation.

Adjustment of the converter output voltage: 4,5V÷19V DC, 2A max.

PAGE 1
DC/DC20SD v.1.0 DC/DC 2A Step down DC/DC converter with adjustable output voltage EN** Edition: 4 from 12.10.2017 Supercedes the edition: 3 from 11.02.
PAGE 2
1. Technical description The step down converter DC/DC 2A (DC/DC20SD) is used for step down the input voltage from the range between 8V÷28V DC to the voltage range of 4,5V÷24V DC at the output, adjusted with the P1 potentiometer. The maximum load current is Imax=2A (Pmax=24W). The 3V difference between the input (lowered) and output voltage is required for the proper operation of the converter.
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1.3. Technical parameters: - Electrical parameters (Table 3) - Mechanical parameters (Table 4) Table 3.
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2.2. Installation procedure. 1. Mount the enclosure (cabinet, etc.) and lead cables through cable glands. 2. Mount the DC/DC converter with adhesive tape or mounting screws. 3. Supply DC voltage to the + IN, -IN terminals with correct polarization. The supply voltage should be selected according to the table and depending on the output voltage: DC input voltage 8÷28V 12÷28V 16÷28V 22÷28V DC output voltage 4,5÷6V 4,5÷9V 4,5÷13V 4,5÷19V 4. Switch on the DC voltage. 5.