Carrollton, Tex. OPTEK Technology, a subsidiary of TT electronics, is developing a series of plastic optical fiber (POF) products as a replacement for traditional copper wiring that are designed to support the SErial Real-time COmmunications System (SERCOS) interface protocol for industrial control applications. SERCOS is an open, standardized digital interface for fiber optic communication between digital controls, motor drives, I/Os, sensors and actuators in computer numerical control (CNC) systems.
A fiber optic transmitter/receiver pair is currently under development. The SERCOS transmitter is designed to operate on a 650 nm (red) wavelength and achieve data rates up to 16 Mbits/s over 1 mm POF or 200 microns HCS (hard clad silica) fiber. The receiver unit consists of a PIN photodiode and an on-board digitizing IC with a TTL compatible output, operating on a single 5-V supply. Both devices are packaged in a TO-46 metal can package.
The company said the SERCOS interface was initially developed for machine tool and servo drive control manufacturers to provide high-speed serial communication of standardized closed loop data in real time over a noise immune fiber optic cable. Today, the interface is used in all types of assembly, material handling and robotic equipment, including metal forming and welding machines, plastic molding machines, semiconductor processing equipment, and packaging, converting and food processing machinery. It can also be used for web-fed printing presses, textile processing machinery and fiber winding machines.
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