Denmark-based Scancon, a manufacturer of encoders, has introduced a fiber optic encoder for use with turbine generators. The Scancon SCH94FO is a heavy-duty encoder offering both incremental and fiber optic output and is ideal for applications requiring safe signal transmission over long distances, according to the company.
The SCH94FO incorporates the rugged design features of Scancon's SCH94 hollow shaft encoder with the high transmission distance and noise resistant qualities of fiber optics. The encoder protects against signal disruption by electrical disturbances often encountered during wind turbine operation. The encoder provides an added safety feature by utilizing two redundant fibers.
The SCH94FO encoder is designed to operate with both a digital output and a fiber optic output. The encoder is also available with a fiber-optic-only outlet.
In addition, the encoder offers the option of either red light transmission or infrared light transmission. The red light option allows the customer to see if the fiber is transmitting when power is applied to the encoder. This option is limited to a transmission distance of 250 meters.
The infrared light option allows for a much longer transmission distance (up to 2,000 meters). However, light transmission cannot be viewed directly as with the red light option.