AN ANTI-INTERFERENCE SWITCH SIGNAL TRANSMISSION CIRCUIT

摘要

An anti-interference switching value transmission circuit. A changeover contact is used at a signal terminal, wherein a normally closed contact is connected to a switching value DC-, a normally open contact is connected to a switching value DC+, and a common terminal is connected to a switching value acquisition loop. When no signal exists, the DC- is connected to a positive input end of the switching value acquisition loop through the normally closed contact. Because a negative input end of the switching value acquisition loop is also connected to the DC-, even if interference is caused, no false signal is generated. When a signal exists, the position of the changeover contact changes and the DC+ is connected to the DC- through the closed normally open contact and the switching value acquisition loop to form a loop so that the signal can be reflected. The interference problem is solved by connecting the two ends of the acquisition loop to the switching value DC- when no signal exists.