Power Supply 12V/2A (DIN)

Product Size
  • H: 8.9 cm
  • D: 5.9 cm
  • W: 3.5 cm
Technical specification

Input

100-240VAC

Output

12.0V DC, 2.0A, 24W

Efficiency

87%

Power Factor (Pf)

0.99

Current

2.00A

Connectivity

Zigbee

Wiring

N - Neutral L - Line

Product color

White

Mounting

DIN Rail

LED Indicators

Yes

Operating Temperature °C

-20°C ～ +70°C

Operating Temperature °F

-4°F ～ +158°F

Operating Humidity % RH

20% - 90% RH, Non Condensing

Safety features

Overload, Over Voltage, Short Circuit

IP rating

IP20

Wiring
  • Connect the AC input terminals to mains power: L (Live) and N (Neutral).
  • The power supply converts AC to 5V DC, with outputs labeled +5V and GND.
  • Connect +5V to the device’s VCC input, and GND to its GND input.
  • Use proper gauge wires and double-check polarity to avoid damaging connected devices.
Functional Diagram

Functional Diagram – System Overview

The diagram illustrates the internal functional structure of a standard switching mode power supply (SMPS). This block diagram provides a high-level representation of the main operational stages from AC input to regulated DC output.

Block Descriptions:

  • I/P (Input):
    • AC mains voltage is supplied to the power supply.
  • EMI Filter:
    • Attenuates conducted and radiated electromagnetic interference to meet EMC compliance and protect downstream components.
  • Rectifiers & Filter (Primary Side):
    • Performs AC to DC conversion and smooths the rectified voltage using capacitive filtering.
  • Power Switching Stage:
    • A high-frequency switching converter (typically using a MOSFET) chops the DC voltage to drive the transformer. Switching is controlled via PWM (Pulse Width Modulation) for efficient power regulation.
  • Transformer:
    • Provides galvanic isolation between input and output and adjusts the voltage level through step-up or step-down conversion.
  • Rectifiers & Filter (Secondary Side):
    • Converts the high-frequency AC from the transformer back to DC, followed by filtering to reduce ripple and noise. Delivers dual output rails: +V and –V.
  • Detection Circuit:
    • Monitors output voltage levels and generates feedback for regulation. Ensures output remains within defined tolerances under varying load conditions.
  • Control Circuit:
    • Core of the regulation system. Processes feedback signals and adjusts the switching duty cycle accordingly. Ensures stable and accurate DC output.
  • O.L.P. (Over Load Protection):
    • Detects overload or short-circuit conditions on the output. Limits output current or shuts down the converter to prevent thermal damage.
  • O.V.P. (Over Voltage Protection):
    • Monitors output voltage and disables the power supply if voltage exceeds predefined limits, protecting connected loads.
Deduction Curve and Temperature
  1. Load (%)
  2. Ambient Temperature (°C)
Minus Output and Input Voltage Curves
  1. Load (%)
  2. Input voltage (VAC) 60Hz