The ingnal output of otpical encoder！

The signal output is sine wave (current or voltage), square wave (TTL, HTL), open collector (PNP, NPN), push and pull a variety of forms, where TTL is long-line differential drive (symmetrical A, A-; -, Z, Z -), HTL also known as push-pull, push-pull output, the encoder signal receiving device interface should correspond to the encoder.
Signal connection - The pulse signal of the encoder is generally connected to the counter, PLC, computer, PLC and computer connected modules have low-speed module and high-speed module, switching frequency is low and high.
Such as single-phase connection, for one-way counting, one-way speed.
A.B two-phase connection, for positive and negative counting, to determine the positive and negative direction and speed.
A, B, Z three-phase connection for reference position correction with the position measurement.
A, A-, B-, B-, Z-, Z-connected, due to the connection with a symmetrical negative signal, the current contribution to the electromagnetic field of the cable is 0, the attenuation is the smallest, the best anti-interference, can transmit distant distances.
For the TTL with a symmetrical negative signal output of the encoder, the signal transmission distance of up to 150 meters.
For the HTL with a symmetrical negative signal output of the encoder, the signal transmission distance of up to 300 meters.

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