OCD-PPA1G-00AA-B15S-AAW Parallel Absolute Encoder, 15 mm Hollow Shaft

We developed a custom solution for model OCD-PPA1G-00AA-B15S-AAW. Selected when single-turn absolute feedback is required via parallel push-pull output, using a 58 mm blind hollow structure with 15 mm shaft, without introducing fieldbus complexity or multi-turn structures. Typical production lead time: 15 working days.

Key Specifications

• Interface: parallel push-pull
• Type: absolute single-turn
• Resolution: 12-bit (typical configuration class)
• Code: Gray
• Supply: 10–30 VDC
• Protection: IP66/IP67
• Structure: 58 mm blind hollow, 15 mm shaft, 30 mm depth
• Connection: axial cable (industrial wiring)
• Sensing: optical

Decision Snapshot

• Best for: direct absolute position feedback in PLC systems without bus communication
• Key fit: 15 mm hollow shaft + parallel interface for simple controller integration
• Avoid if: the system requires multi-turn retention or network-based communication

Custom Solution Photos

Encoder structure reference: 58 mm blind hollow flange, 15 mm shaft, axial cable outlet.

Signal & Output Architecture

This model outputs direct parallel bit signals representing absolute position.

Primary engineering value:
No protocol parsing is required — controller reads position directly from hardware-level bit mapping.

Primary system constraint:
Parallel architecture increases wiring complexity and makes the system more sensitive to electrical noise compared to bus-based encoders.

Mechanical & Installation Focus

• Blind hollow shaft structure simplifies mounting on driven shafts
• Compact 58 mm housing for standard installations

Critical engineering insight:

Installation precision directly affects signal quality:

• misalignment → shaft stress + vibration
• vibration → unstable bit transitions
• mechanical tolerance → electrical instability

Unlike bus systems, parallel encoders expose mechanical errors directly as signal issues.

Wiring & EMC Discipline

Parallel output requires strict wiring discipline due to multiple signal lines.

Engineering constraints:

• each signal line must be properly shielded
• grounding must be consistent across all channels
• cable routing must avoid proximity to power lines
• voltage stability must be maintained across all outputs

Key system judgment:

Parallel systems are more affected by EMC than by encoder resolution.

Noise can cause:

• bit flipping
• unstable readings
• incorrect absolute position

Failure Logic & Diagnostics

Typical failure patterns:

• wrong position value → signal interference or wiring mismatch
• unstable reading → shielding or grounding issue
• no output → supply or cable failure

Engineering conclusion:

Most faults originate from wiring complexity, not from encoder sensing.

Integration & Compatibility

• Designed for parallel absolute encoder systems
• Suitable for PLC direct input architectures
• Ideal for applications avoiding fieldbus configuration
• Not suitable for distributed network systems

Lead Time

Typical production lead time: 15 working days. Custom adaptation available for shaft interface, cable length, and signal assignment.

Key Technical Data