OCD-PPA1B-0810-B08S-PRT Parallel Encoder with M27 18-Bit Mapping

OCD-PPA1B-0810-B08S-PRT needs to be treated as an 18-bit binary parallel multiturn replacement, where EncoderWorks can configure a custom compatible solution only if the Bit 1–18 pin order, latch timing, DIR input, push-pull level, radial M27 26-pin connector, and ø8 mm blind-hollow clamp fit are preserved together. The main failure boundary is not signal loss, but a clean parallel input set decoded with the wrong bit order, code type, or multiturn range. Typical production lead time: 15 working days.

This configuration is used where a controller reads absolute multiturn position directly through parallel inputs instead of SSI, Profibus, PROFINET, EtherNet/IP, or incremental A/B/Z signals. The encoder combines 10-bit singleturn resolution, 8-bit multiturn mechanical gearing, binary output code, push-pull driver behavior, a ø58 mm blind-hollow flange, ø8 mm blind-hollow shaft, and radial M27 26-pin connector. Replacement work should focus on Bit 1–18 assignment, binary value interpretation, controller input threshold, latch response, DIR state, M27 pin mapping, shaft insertion depth, clamp force, and shield continuity.

System Limits

The first system limit is 18-bit binary mapping. Bit 1 through Bit 18 must remain connected to the same controller inputs as the original encoder. If one bit is shifted, inverted, or assigned to the wrong pin, the PLC may receive a stable but incorrect absolute position value.

The second limit is code type and multiturn scaling. This model uses binary code with 10-bit singleturn and 8-bit multiturn feedback. If the controller logic expects Gray-code conversion, or if the multiturn range is treated as a 12-bit multiturn version, position wrap, preset, and travel-limit behavior can fail after rotation or power cycling.

The mechanical limit is the ø8 mm blind-hollow shaft and radial M27 connector exit. Shaft insertion depth, clamp force, static misalignment, dynamic misalignment, connector clearance, and cable strain must be controlled. A forced bore fit or housing movement can create bearing load, repeatability drift, or intermittent feedback faults under vibration.

Wiring & Installation

Before replacement, record the radial M27 26-pin wiring for Bit 1–18, Latch, DIR, power supply, GND, and shield. Confirm that the controller reads binary code directly, and verify whether the latch input is fixed, pulsed, or synchronized with the controller scan cycle.

During installation, confirm the ø8 mm blind-hollow fit without forcing the shaft. Keep the encoder body square to the mounting face, control clamp preload, route the parallel signal cable away from inverter and motor power wiring, maintain shield continuity through the M27 connector, and avoid ground loops between the encoder housing, machine frame, and controller earth. After startup, verify zero/reference value, counting direction, bit transition stability, latch response, multiturn counting, and repeatability over several machine cycles.

Custom Compatible Solution

EncoderWorks can configure the replacement around the installed controller and mechanical interface:

• Match 10-bit singleturn plus 8-bit multiturn parallel binary position output and push-pull driver behavior
• Preserve Bit 1–18 mapping, latch input timing, DIR logic, supply range, and controller input compatibility
• Adapt the ø58 mm blind-hollow flange, ø8 mm blind-hollow shaft, clamp interface, and radial M27 26-pin connector
• Review connector shielding, grounding, EMC routing, binary decoding, input threshold, shaft fit, clamp preload, and cable strain

Key Data