Redundant Absolute Position Encoders for Safety-Critical Systems

FLUX GmbH has released the IND-MAX DUAL, an inductive angle encoder engineered to deliver redundant absolute position feedback within a single housing. This hardware configuration targets safety-critical industrial automation, surgical robotics, and aerospace systems where operational reliability and minimal spatial footprints are strictly required.

Redundant System Architecture and Hardware Design
The inductive angle encoder integrates two fully independent measurement systems, utilizing separate sensing components and electronics, into one compact housing. By consolidating these systems, machine builders can implement redundant feedback architectures without the mechanical complexity or installation space typically required to mount two separate encoders. The hardware is available in outer diameters ranging from 125 millimeters to 300 millimeters, combining a low-profile design with a large internal bore. The system delivers absolute position resolutions of up to 23 bits, ensuring high-precision data acquisition for automated motion control systems.

Deployment in Harsh Environments
Operating in high-shock or space-constrained environments necessitates robust physical housings and wide operating temperature tolerances. The integration of dual independent systems ensures continuous operational reliability in applications where continuous position feedback is strictly mandated, such as surgical robotics, autonomous platforms, and defense technologies. By generating deterministic angle values inherently upon start-up, absolute position systems prevent the need for mechanical homing routines during power loss or system reboots.

"With the new DUAL variant, we are expanding the range to offer two independent encoder systems in one compact housing, addressing the demand for redundant position feedback," stated Paul Tutzu, Managing Director at FLUX GmbH.

Additional Context
This section details technical specifications and competitive benchmarking not included in the original news release.

The industrial motion control market relies on absolute encoders to maintain deterministic position data without requiring a homing routine after power cycles. In safety-critical sectors subject to stringent standards like IEC 61508 (Functional Safety) or ISO 13849 (Machine Safety), systems require redundant architecture to achieve the necessary Safety Integrity Levels (SIL).

FLUX competes in the high-precision encoder market with sensing manufacturers such as Heidenhain, Celera Motion, and Renishaw. While standard redundancy is often achieved by physically stacking two separate optical or magnetic encoders—which increases the axial length and mechanical complexity of the robotic joint—integrated dual-redundant inductive encoders consolidate two independent measurement channels into a single low-profile housing. Competitive benchmarking in this hardware category focuses on maximum digital resolution (typically ranging from 17 to 24 bits for high-end applications), operating temperature limits, immunity to electromagnetic interference, and the ability to maintain absolute position tracking under high physical shock or vibration loads where traditional optical discs may shatter or fail.

Edited by Aishwarya Mambet, Induportals Editor, with AI assistance.

www.flux.com