Fraba Posital's Optocode series of absolute rotary encoders now also includes models with a hollow shaft (ø 12 mm) that may be fitted with a torque support or clamping rings on both sides. The encoders feature an SSI interface. Alternatively, single-turn encoders with a CANopen interface are available as well. Despite their hollow through-shafts, all multiturn models are equipped with Fraba's proven gearing technology. Suitable for ambient temperatures of -40 to +85°C, the devices are designed for continuous operation at 3000 rpm.
The encoders use a tried and tested optoelectronic scanning method to determine position values. This method is based on the concurrent analysis of a Gray code pattern and two incremental tracks. As a single-turn model, the rotary encoders' highly integrated Opto-ASIC provides a resolution of 65 536 steps per revolution (16 bit). The multiturn model registers a maximum of 16 384 revolutions (14 bit), thereby covering a total measuring range of 30 bit. The encoders' internal clock rate is 800 kHz. Optocode encoders operate without backup batteries and instantly provide current absolute position values without homing even after power failure. All Optocode models are UL-approved.
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