92 – Pvd3665_Gb_Ex_August 2022 
It is mandatory to connect 2 (green-yellow) ground cables between the motor 
frame and machine.  
• the first one is connected to ground screw on the PCB inside the motor, 
• the  other  one  is  connected  to  the  external  motor  housing 
The connecting of these two grounding devices is mandatory in order to 
comply with ATEX standard IEC/EN 60079-0. 
The ground cable cross-section must be the same as the power cable cross-
section 
3.8.3.  Conversion Awg/kcmil/mm²: 
3.8.4.  Motor cable length 
For motors windings which present low inductance values or low resistance values, the own 
cable inductance, respectively own resistance, in case of large cable length can greatly 
reduce the maximum speed of the motor. Please contact PARKER for further information. 
Caution: It might be necessary to fit a filter at the servo-drive output if the 
length of the cable exceeds 25 m. Consult us. 
The length of the cable must be of 3 meters min.