How to use the digital multimeter to detect the 4-pin relay on the circuit board? 5 feet and how to detect?

Answer:

4 feet of the relay is normally open or normally closed, generally only need to control the signal through the weak side, this 4-pin relay is generally not a magnetic relay. 5 feet of the relay are basically able to keep the relay, the signal side through the pulse signal control open and close, the other side of the three feet like a single pole double throw switch. Always a group of open. You use the topical test when the test as long as the three feet in the middle of the foot and the relationship between the other feet can be

4 feet, with a multimeter discharge block file, measured 2 feet of resistance (about a few Europe), is to pull the coil feet, the other two feet are normally open. 5 feet the same token, with a multimeter discharge block file, measured 2 feet have resistance (about a few Europe), is to pull the coil feet, the other three feet have a foot and the other two feet often open normally closed The

4 feet With a multimeter resistance file, the resistance value in a few hundred or more or more than 1K (rated voltage, the coil resistance is also different), this group is the relay coil, the other two feet is the switch feet 5 feet With a multimeter resistance file, the resistance value in a few hundred or more or more than 1K (rated voltage is different, the coil resistance is also different), this group is the relay coil, the other three feet, two feet are pass, This group is often closed, the problem is that the two feet of the normally closed and the other foot are often open, how to determine which foot is the middle of the dynamic contact foot it, a method is power measurement, there is a general 5 The foot of the relay, near the end of the coil at the middle of a single foot, the foot is the middle of the contact pin