Description
Most of the photocoupling device isolation voltage is above 2.5kV, some devices reach 8kV, both high voltage high current high power photocoupling device, and high speed high frequency photocoupling device (frequency up to 10MHz). Commonly used devices such as 4N25, its isolation voltage of 5.3kV; 6N137, its isolation voltage of 3kV, frequency of 10MHz or more.
D674A906U01 pulse transformer turns less, and the primary and secondary windings were wound on both sides of the ferrite core, this process makes its distribution capacitance is particularly small, only a few pF, so it can be used as a pulse signal isolation components. Pulse transformer transfer input and output pulse signals, do not pass the DC component, PLC using digital signal input / output control equipment does not require the transfer of DC component, and therefore in the industrial control system has been widely used.
The external signal of the ANC-100E AN-X2-AB-DHRIO is suppressed by the RC filter circuit and bidirectional voltage regulator to suppress the normal mode noise interference, and then input to the pulse
The primary side of the pulse transformer is then fed. In order to prevent excessive symmetrical signal breakdown circuit components, the secondary output voltage of the pulse transformer is limited by the voltage regulator and then entered into the internal measurement and control system. Generally speaking, the signal transmission frequency of the pulse transformer is between 1kHz and 1MHz, and the new high-frequency pulse transformer can reach a transmission frequency of 10MHz.
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