Sine-Cosine Analog Encoder Connection; Digital Hall Connection For Motor + Hall + Incremental Encoder - Technosoft iPOS80x0 BX-CAN Technical Reference

3.4.6.4

Sine-Cosine Analog Encoder Connection

Recommendations for wiring:
a) Always connect both positive and negative signals when the position sensor is differential and provides them.
Use one twisted pair for each differential group of signals as follows: A+/Sin+ with A-/Sin-, B+/Cos+ with B-
/Cos-, Z+ with Z-. Use another twisted pair for the 5V supply and GND.
b) If the iPOS80x0 5V supply output is used by another device (like for example an encoder) and the connection
cable is longer than 5 meters, add a decoupling capacitor near the supplied device, between the +5V and GND
lines. The capacitor value can be 1...10 μF, rated at 6.3V.
3.4.6.5

Digital Hall Connection for Motor + Hall + Incremental Encoder

Remarks:
1. This connection is required when using Hall start method BLDC or PMSM and also for the Trapezoidal
commutation method. The digital halls are not used in this case as a feedback measurement device. The actual
motor control is done with an incremental encoder.
2. The length of the cables must be up to 30m, reducing the exposure to voltage surges in industrial environment.
 Technosoft 2019
Figure 3.18. Sine-Cosine analogue encoder connection
Figure 3.19. Digital Hall connection
24 iPOS80x0 BX-CAN/-CAT Technical Reference