Pro-Range 2500 PPR ABZ 3-Phase Incremental Optical Rotary Encoder - 2m Cable, Stainless Steel Shaft

This encoder has 2500 Pulses Per Revolution (PPR), meaning it outputs 2500 square wave cycles on channel A per shaft rotation. Counts Per Revolution (CPR) refers to the total number of state transitions (rising and falling edges) available for counting. Since the A and B channels are in quadrature, counting all edges of both channels yields 10,000 Counts Per Revolution (CPR), providing four times the resolution for precise position tracking.

Connect the encoder's VCC (Red wire) to your Arduino's 5V pin and GND (Black wire) to GND. The phase outputs (White-A, Green-B, Yellow-Z) are open-collector and must be pulled up to your logic voltage (e.g., 5V) using the included 4.7kΩ resistors. Connect each phase output through its pull-up resistor to 5V, then to a digital interrupt-capable pin on the Arduino (e.g., pins 2 and 3). The shield drain wire should be connected to the system ground for noise immunity.

The Z channel, or index channel, outputs a single pulse per complete revolution of the encoder shaft. This provides an absolute reference point, allowing a system to establish a known 'home' or zero position. It is essential for applications requiring periodic position reset or synchronization, such as when a machine needs to return to a specific angular starting point after power cycles or during multi-revolution counting.

Yes, the cable can be extended, but it is critical to maintain signal integrity. Use a shielded cable of the same or higher quality, and ensure the shield continuity is preserved throughout the splice or connection. Keep the total cable length as short as possible to minimize signal attenuation and susceptibility to electromagnetic interference (EMI). Properly ground the cable shield at only one end (typically the controller side) to prevent ground loops.

The encoder is rated for a maximum mechanical speed of 3000 RPM. At this speed, with 2500 PPR, the output frequency on a single channel would be 125 kHz (2500 pulses/rev * 3000 rev/min / 60 sec/min). Ensure your receiving circuitry (microcontroller, PLC, or decoder) can handle this pulse frequency. Exceeding the maximum speed may lead to signal distortion or internal damage.