...to supervise doors and hatches around dangerous machines!
Assurance that a machine stops when a door or a hatch is opened can be solved by using different types of switches and sensors which are monitored with a safety relay or safety PLC. Switches and sensors are available both as non-contact (dynamic or magnetic) and various types of interlocking devices. Interlocking devices can be used when it is required, via a signal, to lock a gate during processes that cannot be stopped during certain operations. They are also used with machines that have a long stop-ping time.
...to ensure that a position is reached!
The sensor monitors that the robot is standing still in a monitored position when someone enters the robot’s working area.  The robot is then only stopped by the program. If the robot leaves the position, the power will directly be cut. This is used when the robot does not stop safely without restarting problems.
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...to manage safety in harsh environments!
Non-contact dynamic sensors have a long life-time because they are not physically mechanically operated. They also endure very harsh environments (i.e. cold, heat, high-pressure wash-down) which is important in the food industry. Because the sensors are small, they are very easy to position and even completely conceal on doors and hatches.
...to prevent mechanical failures!
When a door or hatch loses proper tolerance due to wear or debris building up in the slot for the key, mechanical interlock switches have the probability of failing. Sagging or misalignment can cause the key to break or the screws that hold the head of the switch in position to loosen. This may lead to the interlock switch not giving a stop signal when the door or hatch is opened. For non-contact sensors these risks do not exist. If any of these conditions occur it will lead to a stop signal.
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Why Should I Use?
