POSITAL has introduced diverse-redundant absolute encoders, based on non-certified standard components, for many installations where functional safety is required.
- Combines with functional safety PLCs to suite use in applications that are required to conform to Performance Level/PL d, Cat. 3, according to ISO 13849
- Contains two independent sensor systems for redundant operation
- Measurements from two systems are processed by a functional safety PLC
- If both measured values are the same (within defined tolerances), safe operation is assumed; if there are deviations, the controlling PLC triggers an alarm - with the option of transitioning the system to a defined safe condition
- Makes use of a combination of magnetic and optical sensor technology to ensure safety
- Applications include use in heavy construction equipment and mobile machines
- Magnetic and optical sensor elements are integrated in a compact housing measuring 58 mm (2.3 in.) in diameter that is easy to install, offering a space-saving all-in-one solution
- Resolution is 16 bits per revolution
- Available with wide variety of mechanical options including robust housings with protection levels up to IP67, different connector types, and many flange and shaft variants
- Communicates through CANopen interface
- Suitable for harsh environments and wide temperature range
- Magnetic encoder technology is inherently robust, while the optical components have been specially protected against condensation by the addition of an extra membrane
- Both sensor elements are absolute encoders that measure the position value in single and in multi-turn mode – absolutely battery- and maintenance-free
- Individual parameters - like the exact specifications for activating the 'Safe State' function - can be programmed into the PLC by the system integrator
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