
3.4.2  Connecting the Power Cables 
Access the power terminal connections on the Tuba servo drive by removing the front safety 
cover located at the bottom of the front panel of the unit, as shown below: 
Figure  3-6: Removable Bottom Panel 
After removing the safety cover, the power terminal connections are visible, as follows:  
Figure  3-7: Tuba Power Connectors 
The main power connector located at the bottom of the Tuba, as follows:  
Pin Function  Cable  Pin Positions 
B1  DC Link (+)  DC Link 
B2  DC Link (-)  DC Link 
AC3 Phase 3  Power 
AC2 Phase 2  Power 
AC1 Phase 1  Power 
PE Protective earth  Power 
   AC Motor
Cable  DC Motor
Cable 
PE Protective earth Motor  Motor 
M3 Motor phase  Motor  N/C* 
M2 Motor phase  Motor  Motor 
M1 Motor phase  Motor  Motor* 
 When connecting several motors, all must be wired in an identical manner. 
*  On prototype versions of the Tuba, M3 was connected to the Motor and M1 was not. 
Table  3-2: Connector for Main Power and Motor Cables 
Tuba Installation Guide  Installation 
MAN-TUBIG (Ver. 1.3) 
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