1Manufactured by premium aluminum alloy materials, with heat dissipation, corrosion resistance, wear resistance and durability. 2Punching mesh heat dissipation hole design solves the problem of being unable to use due to overheating in high temperature environments. 3The switching power supply comes with input voltage 110V220V switch button, to better provide you more advantages. 4The connection terminal is with a safety protective cover to avoid electric shock, dustproof protection and safety isolation protection. 5The multiple installation holes on the side of the back is convenient for operation, reduces auxiliary time and improves production efficiency. Item Type: Switching Power Supply Material: Aluminum Alloy Model: YY-500-12 Input Voltage: AC 90-130V, AC 170-264V Output Voltage: DC 12V Output Current: 41.7A Error Range: 1% Adjustable Pressure Range: 5% Power: 500W max Waterproof Rating: IP20 Start, Rise, Hold Time: 200ms, 50ms, 20ms Working Temperature and Humidity: -10-60, 20%-90%RH Storage Temperature and Humidity: -20-80, 10%-95%RH Product Size: Approx. 215x115x50mm/8.5x4.5x2.0in Application: Industrial automation, PLC control cabinet, DC motor, medical equipment, access control display system, monitoring equipment, light box advertising, LED equipment. 1 xSwitching Power SupplyBefore using the switching power supply, please read the operating instructions carefully to check whether the current and voltage of the switching power supply and the load current and voltage meet the requirements for use.1. When using the switching power supply, be sure to pay attention to the internal high voltage part of the machine, and do not touch the internal components of the machine. Nonprofessionals should not disassemble the power supply for maintenance, otherwise there is a danger of electric shock. Before use, read the relevant wiring marks.2. When wiring, please turn off the input power.3. To ensure safe use and reduce interference, please ensure that the ground terminal FG is reliably grounded. (The grounding wire diameter is reasonably selected according to the input voltage and output power)4. Check whether the mounting screws are in contact with the power supply board components, and measure the insulation resistance between the housing and the input/output to avoid electric shock.5. Most of the LED switching power supply case is the heat dissipation part. When installing, increase the contact area between the case and the case to facilitate heat dissipation and extend the life of the power supply. If the power supply has a builtin fan, the fan's vent should not be blocked.6. Before the installation is complete, please carefully check whether the wiring is correct, to prevent wrong connection or reverse connection, and then start it after confirming that it is correct.