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mPower 300 Series (Rev G)
1.4 Safety Notices
Mortal danger - Hazardous voltage
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This is electrical equipment with some parts operating with dangerous voltage. All exposed compo-
nents which can have live voltage must be covered.
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All work on connections must be carried out under zero voltage (output disconnect), and may only
be performed by qualified and informed persons. Improper actions can cause fatal injury as well as
serious material damage.
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Never touch cables or connectors directly after unplugging from mains supply as the danger of
electric shock remains. Verify there is zero voltage with a handheld meter.
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Never touch the contacts on DC output terminal directly after switching off the DC output, because
there still can dangerous voltage present, sinking more or less slowly depending on the load. There
also can be dangerous potential between negative DC output to GND or positive DC output to GND
due to charged capacitors. Verify there is zero voltage with a handheld meter.
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Always follow 5 safety rules when working with electric devices:
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Disconnect completely.
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Secure against reconnection.
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Verify that the system has zero voltage.
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Carry out earthing and short-circuiting.
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Provide protection from adjacent live parts.
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The equipment must only be used as intended.
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The equipment is only approved for use within the connection limits stated on the product label.
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Do not insert any object, particularly metallic, through the ventilator slots
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Avoid any use of liquids near the equipment. Protect the unit from wet, damp and condensation.
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Do not connect loads, particularly low resistance, to power supplies under power; sparking may
occur which can cause burns as well as damage to the equipment and to the user.
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ESD regulations must be applied when plugging interface cards or modules into the relative slot
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Interface cards or modules may only be attached or removed after the unit is switched off. It’s not
necessary to open the unit.
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Do not connect external power sources with reversed polarity to DC input or outputs. The equip-
ment will be damaged.
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Avoid where possible connecting external power sources to the DC output, and never those that can
generate a higher voltage than the nominal voltage of the unit.
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Never insert a CAT5 cable which is connected to Ethernet into the master-slave socket on the back
of the unit.
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Always configure the various protecting features against overvoltage etc. for sensitive loads to what
the target application requires.
