Connecting a Shaft Encoder (Example)
Pins
You connect the two differential signals (A and B) of the Shaft encoder to one of the trigger board ports as follows:
The Shaft Encoder sends differential signals, i.e., signal A+, signal A-, signal B+, and signal B-. Therefore, you have to use four pins (11 - 14) for receiving two signals (signal A and signal B).
Explanation
If you are using a Shaft Encoder, you receive either one signal or two signals (signal A and signal B).
Using one signal, you are receiving pulses when the transportation belt is moving.
The combination of both signals indicates in addition if the transportation belt moves forward or backward. If you are receiving both signals (A and B), you can suppress and compensate backward movements.
Figure: One signal, indicating the movement of the transportation belt
Figure: Two signals, indicating movement and direction of the transportation belt
Figure: Using both signals for supressing and compensating backward movement of the transportation belt