1. Product synopsis
This product selection AX series safety relays for optimum design, in view of the Siemens S700K type turn point machine characteristics, realized S700K speed the construction of the rail circuit training, joint the actual, the application of the flexible, high reliability, is the rail transit kind professional training for electrical device of choice. 
Along with our country electrified railway and the rapid development of urban rail traffic, to adapt to the need for speed, from Germany Siemens company introduces the equipment and technology, digesting modified from the S700K type ac regulated quickly replaced early point machine of the type of ZD6 regulated dc point machine, and the domestic main lines of the application is S700K type turn point machine. 

S700K model electric turn point machine is rail control system of actuators, and the matching speed rail circuit S700K mainly divided into three parts, namely indoor rail control circuit, rail action circuit and rail said circuit, the five wire circuits, indoor and outdoor contact with 5 lines of root cable named respectively X1 to X5. 
This product according to the field application, combined with the practical teaching characteristics, the cabinet to structure, three parts of control circuit integration to a cabinet put oneself in another's position in S700K realize speed rail circuit all function at the same time, still constitute the electrical concentrated in 6502 a complete electrical combination circuit, can let students to rail control circuit have a whole understanding, grasps the rail control electric circuit principle of work, skilled carry on related circuit of the lap and troubleshooting. Master electrical combination is learning the necessary foundation on 6502 electric. 
The product configuration have control of the power supply, says the power supply, DB instructions, FB instructions, HD instructions, related state display, voltage, measure current loop, involved content: DBQ, BHJ, 1 DQJ, DQJF 1, 2 DQJ, DBJ, FBJ, QDJ, SJ, RC, etc.