What are the functions and principles of repeaters?
Principle: when the relay coil is applied to the required voltage, the armature is sucked into the guide magnet, and the armature presses the contact spring fragment to make the contact switch on, disconnect or switch the controlled circuit. When the coil voltage of the relay is broken, the armature and contact piece return to their original position.
Role: by sending or forwarding data signals to expand the network transmission distance, re generating the signal (that is, amplification and reshaping of the original signal). Principle: a repeater is a device for connecting network lines, often used for two-way forwarding of physical signals between two network nodes. The repeater is the most simple network interconnection equipment, mainly to complete the physical layer, is responsible for the physical layer of two nodes according to a transmission of information, copy, adjust and complete the signal amplification function, in order to prolong the network length.
Repeater (RP) is a device that connects network lines and is often used for two-way forwarding of physical signals between two network nodes. The repeater mainly completes the physical layer function, is responsible for transmitting the information by the bit in the physical layer of the two nodes, completes the signal duplication, the adjustment and the enlargement function, thus lengthens the network length. As a result of loss, the signal power transmitted on the line will be gradually attenuated, attenuation to a certain extent will cause signal distortion, and this will lead to a reception error. Repeaters are designed to solve this problem. It completes the connection of the physical circuit, amplifies the attenuated signal and remains the same as the original data. In general, both ends of the repeater are connected to the same media, but some repeaters can also do the switching of different media. In theory, the use of repeaters is unlimited, and the network can therefore be indefinitely extended. In fact, this is impossible, because the network standards are specific to the delay range of the signal, the repeater can only work effectively within this set of regulations, otherwise it will cause network failure.
Effect: the general relay has 2 or 4 pairs of normally open normally closed contact, when the coil operating normally open, normally closed variable variable normally closed, normally open, if, at this time, normally open normally closed contact is connected in the control circuit, a closed or to disconnect the other line function.
