MD280/MD280N User Manual                                            Safety and Precautions 
11 
screws marked in RED. 
 Caution 
z  Do not drop the lead wire stub or screw in the inverter. 
Otherwise it may damage the inverter. 
z  Please install the driver in the place where there is no direct 
sunlight or no vibratory. 
z  When more than two inverters are to be installed in one 
cabinet, due attention shall be paid to the installation locations 
(refer to Chapter 3 Mechanical and Electrical Installation to ensure 
the heat sinking effect. 
1.1.3 During wiring: 
Danger 
z  Operation shall be performed by the professional engineering 
technician. Otherwise there will be danger of electric shock. 
z  There shall be circuit breaker between the inverter and power 
supply.    Otherwise, there may be fire. 
z  Make sure the power is disconnected prior to the connection.   
Otherwise there will be danger of electric shock. 
z  The earth terminal shall be earthed reliably. Otherwise there 
may be danger of electric shock. 
 
Danger 
z  Do not connect the input power cable to the output ends U, V 
and W. Otherwise it may damage the inverter. 
z  Ensure the wiring meet the EMC requirements and the local 
safety standard.    The wire size shall be determined according to 
the manual.    Otherwise, accident may be caused! 
z  The brake resistor cannot be directly connected between the 
DC bus terminals (+) and (-).    Otherwise it may cause fire. 
z  The shiled wire should be used for encoder, and the shielding 
layer shall be earthed reliably.     
 
 
 
 
 
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