Key transfer – the principle
Modular. Expandable. Flexible.
A trapped key safety switch (1) can contain multiple keys, thereby monitoring multiple access points at once wirelessly (2, 3). A modular design allows the system to be expanded easily, for example with additional mechanical interlocking devices (4). The wireless safety saves costs and increases the availability of the system.
Safety door closed and locked
To open the safety door, a key from the trapped key safety switch (1) must be inserted into the mechanical guard lock (2). Only then can the door be opened.
Safety door opened, key retained
As long as the door is open, the key is retained in the mechanical guard lock (2). Only once the door is closed the key can be removed. The system-enforced process means that it is only possible to start the machine once all keys (2, 3 and 4) are re-inserted into the trapped key safety switch (1).
Hybrid system – ergonomic safeguard
SAFEMASTER STS combines the advantages of safety switches, guard locks, key transfer and command functions in a single system. The hybrid system offers the advantage of more ergonomic operation for the system. For instance, a main entrance that is used frequently (1) can be monitored electrically, while access points used only rarely for maintenance and service (2, 3) can be secured by purely mechanical means, or wirelessly using key transfer. The advantage of the hybrid solution in comparison to the classic key transfer solution is that the operator must travel shorter distances, and is able to operate the main entrance quickly. This saves time and increases productivity.