Zero crossing, namely zero-crossing detection means zero crossing of the AC voltage is automatically detected and produce the drive signal to the electronic switch at this time began to open. Modern technology has been combined with the zero crossing with optocouplers technology. Figure 9 is a zero-crossing detection circuit MCU digital AC voltage regulator can be used.
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Fiber coupler fiber or pigtails for two active connections to popular known as flange.Optical final box is a cable end fitting, he is a fiber optic cable, the other end is a pigtail, is equivalent to a split into a single fiber optic cable equipment. Fiber optic cable splice box is two butt into a long cable with.Between them can not be used inter changeably between the cable and the optical transceiver is connected through Optical final box, which is the only plug on Optical Pigtails.
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The coupler is connected to an optical fiber or pigtail, only the connection portion is active, not welded. Coupler can only connect two pigtails and sub-SC / PC FC / PC interfaces, and between the cables and pigtails are welding machine welding is dead. About terminal box and splice box can be understood, in which the two heads fused fiber, but the former is a fiber optic cable and pigtail splicing, which is the fusion between the cable. Buy fiber optic patch cord