Power supply wiring recommendations
Protective earth (PE) connection
The protective earth (PE) connection is required for safety and should always be connected to a low
impedance earth point. A Connecting PE to the motor housing solves many noise and EMI problems.
.good grounding of the driver to the earth of the power supply is also essential
PE wire section should be, at least, the same as power supply cables.
Always minimize PE connection length. Having a central earth connection point is a good practice to avoid
ground loops. Always use good quality plated screws that won’t oxidize or lose conductivity during the
expected lifetime. Whenever possible, mount the Pluto Servo Drive on a metallic conductive surface
connected to earth. Note that the PE terminal is internally connected with the Pluto Servo Drive standoffs.
Wire section
The minimum wire section is determined by the current consumption and the allowed voltage drop across
the conductor. It is preferred to use wide section stranded wires to reduce impedance, power losses and
ease the assembly. Insulator diameter should not exceed 3.5 mm (the connector pitch).
Connection Minimum wire size Maximum wire size
Stranded wire (preferred)
0.5 mm
2
1.5 mm (16 AWG)
2
Solid wire
0.5 mm
2
1.5 mm (16 AWG)
2
Wire ferrules
For low power applications, it is recommended to use wire ferrules to prevent cable damage or wrong
contacts. Due to the connector's size, the maximum allowed ferrule size is 0.5 mm .Ensure crimped
2
ferrule diameter does not exceed 2 mm and the insulator is < 3.5 mm. For higher power applications,
direct cable connection is recommended.
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