Feedback Sensors; Encoder In The Motor Shaft And One (Two) Toggle Switches - Zapi EPS-AC0 SWs&ENC User Manual

4.5 Feedback sensors

Feedback sensors are mandatory to close the loop in manual mode if a twin pot is
mounted on the steering wheel.
Feedback sensors are strongly suggested (to improve safety) in manual mode if a
stepper motor is mounted on the steering wheel (open loop).
Eps-ac0 may handle two different configurations for the feedback sensors:
1) Incremental encoder in the motor shaft together with a feedback potentiometer
on the steered wheel.
2) Incremental encoder in the motor shaft together with one (or two) toggle
switch(es) in the straight ahead (and 90 degrees) position of the steered wheel.
On request, in the closed loop application only, eps-ac0 may work also with two
encoders in the motor shaft together with a straight ahead toggle switch.
This manual deals with above configuration 2 (i.e. incremental encoder in the
motor shaft together with one or two toggle switches on the steered wheel).

4.5.1 Encoder in the motor shaft and one (two) toggle switches

It consists of:
1) Straight ahead toggle switch on the input CNA#3 and GND.
2) 90 degrees toggle switch on the input CNA#2 and GND.
3) Feedback encoder on the steering motor shaft
AEMZP0EA - EPS-AC0 SWs&ENC - User Manual
Figure 4–4
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