DOLD protection against being locked in a dangerous area-Safetmaster STS

The key transfer system combines the advantages of none wiring, mechanical safety with electrical safety The basic principle of the key transfer system ensures that a machine or system is in a safe state before an access can be made. A further safety aspect is that a key is inserted either in a safety switch or can be used for opening a door lock. This property can be used to force a certain operating sequence, which can not be deviated from. As a result, a high safety level is achieved and a l