Pro-Range 400 PPR 2-Phase Optical Rotary Encoder with 1.5m Cable & Pull-Up Resistors

This encoder has 400 Pulses Per Revolution (PPR), which refers to the number of optical slots on the internal disk. Because it outputs two square waves in quadrature (A and B phases), a quadrature decoder can detect four state changes per pulse, resulting in 1600 Counts Per Revolution (CPR). CPR provides higher resolution for precise position tracking.

Connect the encoder's VCC (Red wire) to a 5-24V DC power source. The Phase A (White) and Phase B (Green) outputs are open-collector. You must connect each output line to your microcontroller's 3.3V logic pin via one of the included 4.7kΩ pull-up resistors. The other side of the resistor connects to 3.3V. This configuration ensures a clean logic-high signal and protects the output transistor.

The golden wire is the cable shield/drain wire, designed to protect the signal wires from electromagnetic interference (EMI), which is critical near motors and drives. For optimal performance, connect the shield wire to the ground (GND) at the controller end only, typically at the system's chassis or earth ground point. Avoid creating ground loops by not connecting it at both ends.

Yes. The two-phase (A/B) quadrature output allows detection of both speed and direction. The pulse frequency corresponds to rotational speed. The phase relationship between Channel A and Channel B (which signal leads the other) indicates the direction of rotation. Most microcontrollers and PLCs have dedicated hardware quadrature decoder inputs, or you can use software libraries to interpret these signals.

Mount the encoder using the provided M3 screws, ensuring the housing is secure and aligned to prevent radial or axial load on the shaft. The solid stainless steel shaft is durable but designed for coupling via a flexible or rigid coupling that minimizes misalignment. Avoid applying excessive side load or axial force, as this can damage the internal bearings and optical assembly. Refer to the manufacturer's datasheet for specific load limits.