OCD-PPA1G-0810-B15S-PRT Parallel Encoder with 18-Bit Connector Mapping

For OCD-PPA1G-0810-B15S-PRT, EncoderWorks can provide a custom compatible replacement solution for bit-parallel multiturn absolute feedback systems where the key checks are 18-line position mapping, latch timing, DIR logic, and M27 26-pin connector assignment. This model combines 10-bit singleturn and 8-bit multiturn data, so a replacement must be verified beyond one shaft revolution. Typical production lead time: 15 working days.

This encoder is used where a PLC input card, counter module, or legacy controller reads absolute position through individual digital conductors instead of SSI, CANopen, or Profibus. The replacement work must confirm the full parallel bit structure, not only the encoder size. Push-pull output level, Gray-code interpretation, multiturn bit order, latch behavior, direction input, connector pinout, radial cable routing, and blind-hollow shaft engagement must match the existing control system.

System Limits

The main electrical limit is multiturn bit mapping. The controller reads both the 10-bit singleturn value and the 8-bit multiturn value through separate parallel lines. If a multiturn bit is swapped, ignored, or connected to the wrong input, the position may look correct within one revolution but become wrong after the shaft crosses a turn boundary.

Latch timing is the second failure boundary. If the PLC samples the parallel lines while the shaft is moving through a transition point, it may capture a false value. This is especially important for multiturn feedback because a transition error can affect the absolute travel position, not only the angle inside one revolution.

The mechanical limit is the ø15 mm blind-hollow shaft interface. The bore, 30 mm shaft depth, and ø58 mm flange must be installed without radial preload or dynamic misalignment. Shielding and connector grounding should also be checked, because parallel conductors are sensitive to noise from inverter, motor, brake, or solenoid wiring.

Wiring & Installation

Before removing the existing encoder, record the complete M27 26-pin assignment for Bit 1 through Bit 18, Latch, DIR, supply, and GND. The replacement should be wired by pin function rather than by assumed cable color or connector order.

After wiring, rotate the shaft slowly and confirm that the controller value changes smoothly in the expected direction. Then check the multiturn count across more than one revolution. If the application uses travel limits, indexing stops, or position-based interlocks, verify those switching points again after mechanical zero alignment.

Custom Compatible Solution

EncoderWorks can configure the replacement around the installed machine requirements:

• Match bit-parallel output, push-pull voltage level, Gray-code reading, and controller input mapping
• Verify 10-bit singleturn and 8-bit multiturn behavior before shipment
• Adapt the ø58 mm blind-hollow flange, ø15 mm bore, radial M27 connector layout, and cable requirement
• Review latch, DIR, shielding, grounding, and blind-hollow shaft load for stable operation

Key Data