RoboteQ AX3500 Cable Length and Noise Considerations, Motor - Encoder Polarity Matching, Name

Connecting and Using the Encoder Function

TABLE 14. Encoder Connector Pinout

Pin	Name	Cable Color
		(when using standard network cable)
1	Encoder 2 - Channel B. Optional Limit Switch 4	Orange/White
2	Encoder 2 - Channel A. Optional Limit Switch 3	Orange
3	Ground (same as pin 7)	Green/White
4	5V Out (same as pin 8)	Blue
5	Encoder 1 - Channel B. Optional Limit Switch 2	Blue/White
6	Encoder 1 - Channel A. Optional Limit Switch 1	Green
7	Ground (same as pin 3)	Brown/White
8	5V Out (same as pin 4)	Brown

Cable Length and Noise Considerations

Cable should not exceed one 3’ (one meter) to avoid electrical noise to be captured by the wiring. A ferrite core filter must be used for length beyond 2’ (60 cm). For longer cable length use an oscilloscope to verify signal integrity on each of the pulse channels and on the power supply.

Encoder

Ferrite Core

FIGURE 50. Use ferrite core on cable length beyond 2’ or 60cm

Important Warning

Excessive cable length will cause electrical noise to be captured by the controller and cause erratic functioning that may lead to failure. In such situation, stop operation immediately.

Motor - Encoder Polarity Matching

When using the Encoder module for closed loop speed control, it is imperative that when the motor is turning in the forward direction, the counter increments its value and a posi- tive speed value is measured.

80 AX3500 Motor Controller User’s Manual Version 1.9b. June 1, 2007