8.A24D.68C2.C212 PROFINET Encoder with Large-Bore AX Clamp

For 8.A24D.68C2.C212, EncoderWorks can provide a custom compatible replacement solution for large-shaft PROFINET absolute encoder systems where the key checks are ø42 mm H7 shaft fit, torque-arm-side locking-ring access, 100 mm torque-arm preload, GSDML/device-name configuration, and three-M12 connector wiring. This model should not be treated like a smaller AX adapter version, because the ø42 mm bore makes clamp torque, shaft runout, and torque-arm preload the primary replacement boundaries before PROFINET commissioning is even completed. Typical production lead time: 15 working days.

This configuration combines a Kübler AX hollow-shaft adapter with a Sendix 5868 absolute multiturn encoder. The AX section provides a ø42 mm hollow-shaft bore, locking ring on the torque-arm side, and 100 mm torque arm. The encoder body provides PROFINET IO absolute position feedback through three radial M12 connectors using the PROFINET encoder protocol version 4.1. Replacement work should focus on shaft fit, clamp access, torque-arm alignment, device name, IP assignment, GSDML file, scaling parameters, preset behavior, diagnostics, and shield grounding.

System Limits

The first system limit is the large-bore AX installation. The ø42 mm shaft must fit the H7 adapter bore without forcing the clamp, and the locking ring must remain accessible from the torque-arm side after installation. With this bore size, shaft runout, bracket stiffness, and clamp load can create housing movement, bearing stress, or repeatability drift.

The second limit is PROFINET commissioning. The controller must preserve the original device name, IP setting, GSDML version, encoder profile behavior, scaling, preset value, counting direction, and diagnostic response. A replacement may appear online while still returning the wrong position if the stored configuration does not match.

The third limit is the AX operating envelope. The adapter is rated IP64, weighs about 3.5 kg, and has temperature-dependent speed limits. High shaft speed, high ambient temperature, or torque-arm stress can become the practical failure boundary before the PROFINET network itself becomes unstable.

Wiring & Installation

Before replacement, record the PROFINET device name, IP address, GSDML file, scaling parameters, preset value, counting direction, alarm handling, and diagnostic behavior from the controller project. Also record the three radial M12 connector assignments for PROFINET ports, supply voltage, ground, and shield connection.

During installation, confirm the ø42 mm H7 shaft fit, keep the locking ring on the torque-arm side, and align the 100 mm torque arm without preload. Route PROFINET and power cables away from inverter output wiring, maintain shield continuity through the M12 connectors, and avoid ground loops between the encoder housing, machine frame, and cabinet earth. After startup, verify device recognition, actual position value, direction, preset response, diagnostics, torque-arm movement, and repeatability over several machine cycles.

Custom Compatible Solution

EncoderWorks can configure the replacement around the installed shaft and PROFINET control system:

• Match the AX ø42 mm hollow-shaft adapter, torque-arm-side locking ring, 100 mm torque arm, and mounting envelope
• Preserve Sendix 5868 PROFINET IO protocol behavior, GSDML setup, scaling, preset, direction, and diagnostic response
• Adapt the three radial M12 connector layout, 10–30 VDC supply range, Ethernet wiring, and shield grounding
• Review clamp torque, large-bore shaft fit, torque-arm preload, IP64 installation limits, and temperature-speed operating margin

Key Data