Switch By-pass circuit

Abstract

The invention provides a switch By-pass circuit including two RJ45 network interfaces and four relays (1JDQ1 to 1JDQ4). A first pin and a second pin of RJ45-1 are connected with a third contact and a sixth contact of 1JDQ1 respectively. A third pin and a fourth pin of RJ45-1 are connected with a third contact and a sixth contact of 1JDQ2 respectively. A first pin and a second pin of RJ45-2 are connected with a third contact and a sixth contact of 1JDQ3 respectively. A third pin and a fourth pin of RJ45-2 are connected with a third contact and a sixth contact of 1JDQ4 respectively. A second contact and a seventh contact of 1JDQ1 are connected with a second contact and a seventh contact of 1JDQ4 respectively. A second contact and a seventh contact of 1JDQ2 are connected with a second contact and a seventh contact of 1JDQ3 respectively. The switch By-pass circuit ensures that a single-point fault does not diffuse, improves the stability of the whole system, reduces the fault rate of the system, and meanwhile reduces the maintenance expenditure of companies.

Description

technical field [0001] The invention belongs to the field of circuit design, and in particular relates to a switch By-pass circuit. Background technique [0002] Such as figure 1 As shown, it is the network wiring method of the whole train of the PIS system, including 2 cabs, 6 passenger compartments, 1, 2, 3, and 4 are marked as M12 network interfaces, and train data, including broadcast data, media data, and monitoring data, pass through the switch The transmission, from the cab to the passenger compartment or from the passenger compartment to the cab, is a level-by-level transmission. For example, to transmit data from the cab 1 to the passenger compartment 2, it must pass through the passenger compartment 1 and cannot be transmitted across levels. According to field data, the failure rate of switches in practical applications is relatively high, mostly due to power supply damage, such as figure 1 As shown, although redundancy is considered in the design and two links a...

AI Technical Summary

Problems solved by technology

[0002] like figure 1 As shown, it is the network wiring method of the whole train of the PIS system, including 2 cabs, 6 passenger compartments, 1, 2, 3, and 4 are marked as M12 network interfaces, and train data, including broadcast data, media data, and monitoring data, pass through the switch Transmission, from the cab to the passenger compartment or from the passenger compartment to the cab, is a level-by-level transmission. For example, when transmitting data from the cab 1 to the passenger compartment 2, it must pass through the passenger compartment 1 and cannot be transmitted across levels.

According to field data, the failure rate of switches in actual applications is relatively high, mostly due to power supply damage, such as figure 1 As shown, although redundancy is considered in the design and two links are designed, when one link fails, the other link can still work without affecting the functions of the entire system, but the power failure of the switch will cause all functions of the switch Failure, which in turn causes the train data to be interrupted at the fault point of the switch, affecting the function of the entire train

Images