User's Manual

Geo MACRO Drive User Manual

178 Appendix A

One possible cable type for encoders is Belden 8164 or ALPHA 6318. This is a 4-pair individually

shielded cable that has an overall shield. This double-shielded cable has a relatively low capacitance and

is a 100Ω impedance cable.

Cables for single-ended encoders should be shielded for the best noise immunity. Single-ended encoder

types cannot take advantage of the differential noise immunity that comes with twisted pair cables.

Note:

If noise is a problem in the application, careful attention must be given to the

method of grounding that is used in the system. Amplifier and motor grounding

can play a significant role in how noise is generated in a machine.

Noise may be reduced in a motor-based system by the use of inductors placed

between the motor and the amplifier.