Any scissors When the route (command) is sent in any point crossing or level crossing, commands are transmitted to the relevant switch motor and signal lamp via the SKP (signal control panel). When the scissor motor and signal lamps are positioned according to the route, the interlocking system locks these devices and prevents a second command from being sent. The interlocking system is SIL3 Assessment certified. We provide services in the design of the interlocking system, product supply, field application and commissioning.