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UNINTENDED EQUIPMENT OPERATION |
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Be sure to follow the instructions and considerations given in the list below to execute a managed shutdown. |
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Failure to follow these instructions can result in death, serious injury, or equipment damage. |
oThe described principle applies only to the TM5 / TM7 System modules listed in this table.
oThe upstream safety-related switch must meet the required category, SIL, PL for the needed designated category according to EN ISO 13849-1 / EN 62061.
It must meet the technical requirements for the intended use. These include, for example, switching power, environmental conditions, etc.
The external safety-related switching device must be connected to the TM7 module of the respective potential group to which the supply is being fed.
oIn order to achieve category 4. PLe (EN ISO 13849-1) shutdown, the entire module supply (feed via 2 pins) has to be safely shutdown.
oThe potential groups, for which the operating principle is applied, can only be used with modules that are released for the principle with the corresponding revision.
oBe aware of the maximum safety-related reaction time of 500 ms when shutting down the potential group.
The shutdown times needed for the upstream safety-related switching device and actuator must also be added.
oOnly a wiring according to the described wiring principle will provide that the E-stop safety-related function securely shuts off the outputs according to the relevant category.
If the status of the secure outputs is verified with a control element, it is important that the 24 Vdc current is not fed into the module if the control element functions incorrectly.
oA short circuit between the digital output and the 24 V supply can result in the 24 V supply being fed back into the module supply voltage.
As a result, the safety-related function can no longer be fulfilled, which means that none of the module channels can be shutdown using the upstream safety-related switching device.
To prevent this, one of the wiring methods listed in EN ISO 13849-2 must be used for all the digital output channels of the potential group in order to rule out short circuit errors between the output channels and the 24 V supply.
