Bus unit

Abstract

Abstract PURPOSE:To prevent a trouble due to an earth potential difference while reducing an influence of electrical noises by smoothly handling the racing among data as to a right to send by a photo switching board when coupling control modules making use of optical fiber transmission. CONSTITUTION:The output data signal of star-shaped light branch circuit 2 branching input light to several and outputting them is led to computer modules 1A-1C via photo transmitter-receivers 3A-3C, and respective outputs of those modules 1A-1C are inputted to control circuits 4A-4C. To those circuits 4A-4C, photo transmitters 6A-6C which output requests to send to photo receivers 10A- 10C connected to photo switching board 7 are connected, and photo receivers 5A- 5C which detect transmission enable signals are further connected. Then, requests to send are applied to electrodes 8A-8C provided to board 7, and the light of light emitting unit 11 is curved in directions of curves 9A-9C to supply permissions to send to photo receivers 5A-5C, thereby exercising smooth control over the racing among modules 1A-1C.

Inventors

• 👤 Shigeo Nakatsuka
• 👤 Mitsuhiro Ishizaka
• 👤 Takane Kakuno
• 👤 Tachiki Ichihashi

Bibliographic Details