D6mm Solid Shaft 5-24 VDC 600 Pulses PNP Incremental Photoelectric Rotary Encoder

Specifications

• Resolution: 600 Pulses Per Revolution (PPR) / 2400 counts per revolution under 4x quadrature decoding.
• Output Type: PNP Open Collector (Sourcing output).
• Operating Voltage: 5V to 24V DC wide supply range.
• Phase Output: AB two-phase digital square wave output (90° phase shift).
• Shaft Diameter: 6mm D-Type Solid Shaft.
• Outer Body Diameter: 38mm compact industrial housing.
• Maximum Mechanical Speed: 6000 RPM.
• Current Consumption: ≤ 80mA.
• Response Frequency: 0 – 20 kHz.
• Operating Temperature: -10°C to +70°C.
• Protection & Durability: Dust-resistant sealed optical assembly with flexible cable relief.

Applications

• Industrial Length & Cutting Measurement: Integrated into leather, fabric, paper, or steel sheet automatic guillotine cutters for precise fixed-length cutting control.
• Motor Speed & Position Feedback: Mounted on AC/DC geared motors and conveyor drives for real-time RPM tracking and closed-loop motion control via industrial PLCs.
• Automated Material Handling: Used on automated guided vehicles (AGVs), CNC equipment, and robotic arms for accurate wheel displacement and joint angle feedback.
• Height & Displacement Scales: Utilized in digital human scales, civil engineering elevation measurement tools, and automated lift systems.
• Robotics Competition Platforms: High-precision odometry sensor for collegiate mobile robotics requiring dead-reckoning position tracking.

Unlock New Capabilities

• Where You Started: If you have mastered basic 20 PPR mechanical rotary encoders or simple single-channel slotted optical speed sensors, you've likely experienced contact bounce, low resolution, and missing pulses at higher rotational speeds.
• What This Unlocks: Upgrading to this 600 PPR photoelectric solid-shaft encoder enables true quadrature directional sensing, smooth sub-degree positional tracking, and seamless 24V industrial PLC integration without bounce filtering delays.
• Effort Level: Intermediate. Requires hardware counter / interrupt pins on microcontrollers (Arduino, ESP32, STM32) or standard 24V high-speed counter (HSC) inputs on PLCs.

Package Includes:

• 1 X  D6mm Solid Shaft 5-24 VDC 600 Pulses PNP Incremental Photoelectric Rotary Encoder

Frequently Asked Questions (FAQ)

• What is the difference between a PNP and NPN rotary encoder?
  A PNP encoder switches the signal line to positive power (VCC) when triggered (sourcing current), making it ideal for standard 24V PLC sourcing inputs. An NPN encoder switches the signal to GND (sinking current).
• What operating voltage does this encoder require?
  This encoder operates on any DC voltage between 5V and 24V DC, making it directly compatible with both 5V microcontrollers and 24V industrial control systems.
• How do I measure both direction and speed with this encoder?
  The encoder outputs two phase signals, Phase A and Phase B, offset by 90°. By checking which phase leads the other in hardware interrupts, you determine direction; counting pulse frequency determines speed.
• What resolution can I achieve with quadrature decoding?
  While the physical disk provides 600 pulses per revolution, using 4x quadrature decoding (reading both rising and falling edges on both A and B channels) provides 2,400 counts per revolution (0.15° resolution).
• Can I couple the encoder shaft directly to a motor shaft?
  No, rigidly mounting the shaft can cause axial or radial misalignment that will damage the internal optical assembly. Always use a flexible beam coupling or elastic jaw connector.
• What is the maximum mechanical speed supported?
  The maximum safe rotational speed for the bearings and optical disk is 6000 RPM.
• Is this encoder suitable for high-vibration environments?
  Yes, but ensure it is mounted on vibration-isolated brackets and connected using a flexible shaft coupler to prevent mechanical shock to the optical encoder disk.
• How do I interface this 24V PNP signal with a 3.3V ESP32 or STM32 microcontroller?
  Use a resistor divider, a optocoupler isolator board, or a voltage level shifter to step down the 24V PNP output pulse to 3.3V logic level before connecting to the GPIO pins.
• Why am I getting erratic pulse counts on my microcontroller?
  Erratic counts are typically caused by missing common ground connection, unshielded signal cable run near noisy motor lines, or missing pull-down resistors on the PNP signal lines.
• Does this encoder retain its position after power loss?
  No, this is an incremental encoder. It tracks relative motion while powered. Absolute position requires zeroing/homing upon power-up using a limit switch or index sensor.
• What cable length comes pre-attached?
  It comes with a pre-wired shielded signal cable of approximately 1.5 meters.
• Can this encoder be used outdoors or underwater?
  It features a dust-resistant IP50-rated housing suitable for indoor industrial environments. It is not waterproof and should be shielded from liquid contact.
• What is the output signal current capacity?
  The PNP open-collector output can source up to 30mA per channel, sufficient for driving PLC optocoupler inputs or logic gates.