Installation Manual
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Shake the unit slightly to check the locking action.
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For other information about the products, please refer to www.meanwell.com for details.
Warning / Caution !!
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Risk of electrical shock and energy hazard. All failure should be examined by a qualified technician. Please do
not remove the case of the power supply by yourself!
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Risk of electric arcs and electric shock (danger to life). Connecting both the primary and the secondary sides
together is not allowed.
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Risk of burn hazard. Do not touch the unit in operation and shortly after disconnection!
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Risk of fire and short circuit. The openings should be protected from foreign objects or dripping liquids.
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Only install the unit in a pollution degree 2 environment (Note.1).
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Please do not install the unit in places with high moisture or near the water.
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The maximum operating temperature is 55°C for DDR-120 series , 50°C for DDR-240 series and 60°C for
DDR-480 series. Please do not install the unit in places with high ambient temperature or near fire source.
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The FG (
) must be connected to PE (Protective Earth).
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Output current and output wattage must not exceed the rated value on its specification.
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Disconnect system from supply voltage:
Before commencing any installation, maintenance or modification work: Disconnect your system from
supply voltage. Make sure that inadvertent connection in circuit will be impossible!
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For continued protection against risk of fire, replace only with same type and rating of fuse.
Pour ne pas compromettre la protection contre les risqué d’incendie, remplacer par un fusible de même
type et de memes caractéristiques nominales.
Note.1: Pollution Degree 2 applies where there is only non-conductive pollution that might temporarily become
conductive due to occasional condensation. Generally refer to dry, well-ventilated locations, such as
control cabinets.
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