Influence of common-mode disturbance on output circuit of analogue output control module and solution to it
Ke Liu · Guangdong Electric Power · 2005
The control output signal of IMASO11submodule will fail under interference because of the lack of anti-interference design in the submodule.In this paper, the working principle of IMASO11 submodule output circuit is expounded,and an instance is cited for analyzing the output error caused by common-mode disturbance signal.The use of a photoisolator between the output channel of IMASO11 submodule and the instruction input channel of the actuator is suggested to isolate the interference.It is finally indicated that great attention should be paid to interference prevention in the design of industrial control instruments and equipments.