Connect the output voltage through the mounting method and have the pins connected in series to COM pin, which will make the modules deliver the output of +48v and -48v at the same time.

The EMC (Electromagnetic Compatibility) problem occurred commonly to any electronic equipment. Sinpro’s DC/DC converters are used in widespread applications; hence, the converters are designed to feature improved compatibility.

The DC/DC converters are used as a component. It is acceptable not to apply for safety certificates when the voltage of the converter is low and in the safe range.

Sinpro's standard products are all "disconnected", but we can modify products for clients' requirements.

Due to different standards, the test contents might not be exactly the same. Sinpro is not able to guarantee you that the products will pass certificates without being modified.

Please refer to the instruction manual of power supplies from "downloads" of Sinpro's website.

When the protection mode is removed, most of Sinpro’s power supplies will automatically return to the normal operating state.

In order to meet customer needs, the output voltage of standard power supplies shown on the catalog can be set to the first decimal place if it is within the voltage range, but it cannot be set to the second decimal place.

If both the power supply and the nearby equipment are the heat sources (e.g., dimmers, LED light panels, LED matrices), please pay attention to the following points: 
1. In order to avoid the risk of overheating, the direction of the power supply should be parallel for the convection and keep a distance for more than 3 cm between the power supply and the equipment.
2. Do not install the power supply upside down.
3. Make sure the ambient temperature is in the range of normal operating temperature. 

When an electrical equipment/device is firstly powered up, the inrush current will be drawn; at this moment, the power supply will lower the output voltage to offer a higher current.

There are two kinds of power which are existing in the AC power grid. One is true power (P) measured in watts (W), and the other is reactive power (Q) which is expressed in volt-amperes-reactive (VAR).
True power is used for keeping electrical equipment working normally. In other words, transforming electricity into other forms of energy. For instance, kinetic energy, luminous energy, thermal energy.
Reactive power is existing in electrical circuits, used for the exchange between an electric field and a magnetic field. Besides, it builds and maintains the magnetic field of electric equipment.
Apparent power (S), measured in voltamperes (VA), consists of true power and reactive power. When calculating the efficiency of power supply, we need to calculate by true power (W) instead of apparent power (VA).

There are several factors that will influence the test result of the power efficiency including the test instrument, test fixture, input/output cable, specification of the plug, whether the condition of the power supply is stable, etc.