ABB KSD211B 3BHE022455R1101 Input module

ABB KSD211B 3BHE022455R1101 Input module

KSD211B101 3BHE022455R1101 power input coupling module We often meet the mutual transmission of energy in study and life, in fact, in the circuit, energy also needs to be transmitted to each other, here to mention the concept of “coupling”.

KSD211B101 3BHE022455R1101 Power input coupling module Coupling is the connection bridge of two functional circuits, which can realize the transmission of signals and energy. Common coupling circuits include direct coupling circuit, capacitive coupling circuit, photoelectric coupling circuit and transformer coupling circuit.

Direct coupling

In direct coupling, the two functional circuits are directly connected, and there is a direct impact between the two stages. In the amplifier circuit below, the input signal is amplified by the triode T1, directly coupled to T2 for two-stage amplification, and then directly coupled to T3 for three-pole amplification again.

KSD211B101 3BHE022455R1101 power input coupling module In the resistance-capacitance coupling circuit, the two stages of the circuit are isolated through the capacitor, and the signal is coupled to the next level through the capacitor. Because the capacitor has the function of separating the direct current and alternating current, the Q point of the circuit at all levels will not affect each other, and the signal that is slowly amplified cannot be amplified. So it is often used for alternating high frequency signals.

Transformer coupling

It has poor low frequency characteristics and large volume.