The signal output of the encoder ！

The signal output has a sine wave (current or voltage), square wave (TTL, HTL), open collector (PNP, NPN), push and pull various forms, where TTL is long-term 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 module has low speed module and high speed module, the switching frequency is low and low.
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 and speed.
A, B, Z three-phase connection for position measurement with reference bit correction.
A, A, B, B, Z, Z-connection, due to the connection with a symmetrical negative signal, in the subsequent differential input circuit, the common mode noise suppression, only take the differential mode signal, so its resistance Interference ability, can transmit farther distance.
For TTL encoders with symmetrical negative signal outputs, the signal transmission distance is up to 150 meters.
Rotary encoder consists of precision devices, so when subjected to greater impact, it may damage the internal function, the use should be full attention.

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