FSS58N-F3AADA3GN-0013 13-Bit Gray Code Pin Mapping and Axial Plug

For FSS58N-F3AADA3GN-0013, EncoderWorks can provide a custom compatible replacement focused on 13-bit Gray code pin mapping, axial 19-pin connector assignment, and Ø15 mm recessed hollow-shaft fit. This model should not be treated as the same replacement case as the F2A radial binary version. The main risk is that the controller may receive active parallel outputs, but the code format, connector exit direction, and shaft interface no longer match the original read logic.

The FSS58N-F3AADA3GN-0013 is a singleturn absolute encoder with fast parallel push-pull output, 13-bit resolution, Gray code, aluminum housing, F3A Ø15 mm recessed hollow shaft, AD 19-pin connector, axial exit direction, and V/R, LATCH, PRESET inputs. The FSS58 series is designed for rapid data transfer, with position data read directly from the Gray code disc and code change frequency up to 400 kHz.

The first failure boundary is Gray code interpretation. Gray code reduces multi-bit transition risk, but only if the controller expects Gray code and the bit order is mapped correctly. If the cabinet logic was built for Gray and the replacement is wired or configured as binary, the position word can look stable while representing the wrong shaft angle.

This replacement fails when all 13 output bits toggle correctly, but the PLC decodes the wrong position because Gray code bit order, connector pins, or data-word alignment does not match the original encoder. That is a mapping failure, not an output-stage failure.

The second boundary is the axial AD connector. The 19-pin connector carries data bits, supply, V/R, LATCH, and PRESET. A physically compatible plug does not guarantee the same signal assignment. Data bit 1 through data bit 13 must be checked by function, and the V/R, LATCH, and PRESET inputs must not be mistaken for spare or reserved conductors. The FSS58 documentation lists connector type 9424 and the 13 data outputs together with these control inputs.

LATCH remains important even with Gray code. When LATCH is active, the parallel position word is frozen so the controller can read a stable value. If the old system depended on this timing and the input is left free-running, read instability may appear during fast motion or near code transitions. PRESET must also be handled carefully because it electronically sets the output word to zero.

The Ø15 mm recessed hollow shaft changes the mechanical check. It offers a larger shaft interface than Ø10 or Ø12 versions, but the torque rest must still remain free. The encoder housing is held by a torque rest, and the shaft hub connection is integrated into the encoder. If the torque rest pulls the housing into alignment, mechanical stress can later appear as unstable position feedback.

The replacement decision should first confirm F3A Ø15 mm shaft fit, torque-rest freedom, AD axial connector mapping, 13-bit Gray code order, V/R counting direction, LATCH timing, PRESET behavior, 10–30 VDC supply, and controller input thresholds. EncoderWorks treats FSS58N-F3AADA3GN-0013 as an industrial encoder custom compatible solution where Gray code interpretation and connector assignment decide field reliability.

Typical production lead time: 15 working days.

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