plc.myforum.ro

gaty · Member Joined: 01 Mar 2017 Posts: 188

Emergency stop group shutdown up to SIL 3 or PL via 3SK2 safety relay with PROFINET connection and fail-safe motor starters
https://support.industry.siemens.com/cs/document/109769503/emergency-stop-group-shutdown-up-to-sil-3-or-pl-e-via-3sk2-safety-relay-with-profinet-connection-and-fail-safe-motor-starters
In a emergency, an emergency stop command device is attached and monitored by a 3SK2 safety relay. The safe shutdown of the 3RM1 fail-safe motor starter is performed locally via device connectors via the safety relay. The higher-level controller functionally switches the motor starters via PROFINET.

3SK2 safety relay Emergency stop group shutdown up to SIL 3 3SK2 safety relay Emergency stop group shutdown up to SIL 3

3SK2 safety relay Emergency stop group shutdown up to SIL 3 3SK2 safety relay Emergency stop group shutdown up to SIL 3

Emergency stop group shutdown up to SIL 3 or PL via 3SK2 safety relay with PROFINET connection and fail-safe motor starters
Operating principle
The 3SK2 safety relay monitors the emergency stop command device. When the emergency stop command device is activated, the safety relay shuts down the fail-safe motor starters via the device connectors. The engine starters then safely disconnect the load. If the emergency stop command device is unlocked, the start button can be used again on.
The controller is connected to the safety relay via the PROFINET interface module. The operational switching of the motor starter is implemented in the user program of the controller and transferred to the 3SK2 via PROFINET. The 3SK2 for the control signals via its outputs (F-DQ or QM) to the control inputs of the motor starters (IN1 for direct on-line starters or IN1 and IN2 for reversing starters).
3SK2 to the controller via PROFINET. It is also possible to read the start button for re-activation via input modules of the controller instead of directly on the 3SK2 and thus transfer the signal to the safety relay via PROFINET.
In addition, a remote reset of the motor starters can be initiated by the controller via the PROFINET interface module in order to clear an error or one more motor starters. The motor starters are shut down via the device connectors and then switched on again. In this way, the 3RM1 can be easily acknowledged without having to reset the reset button on the device. The shutdown signal must be active for more than 1 second. Please note that only group errors can be acknowledged. Device faults or a tripping of the motor or relay require acknowledgment via the reset button on the device. For more information, refer to the 3RM1 Equipment Manual
https://support.industry.siemens.com/cs/attachments/66295730/manual_motorstarter_SIRIUS_3RM1_en-US.pdf
In this example, it is assumed that the hazard is only one of the drives in each case.
For this reason, only a single engine starter is considered in safety evaluation, and this is used as an example. If the hazard emanates from the movement of numeroase drives, all motor starters are involved in the safety evaluation.
https://support.industry.siemens.com/cs/attachments/109769503/Safety-ES_Emergency_stop_SIL3_3SK2PN_group.zip
https://support.industry.siemens.com/cs/attachments/109769503/SET_Emergency_stop_SIL3_3SK2PN_group_en.zip
https://support.industry.siemens.com/cs/attachments/109769503/TIA_Portal_Emergency_stop_SIL3_3SK2PN_group.zip
https://support.industry.siemens.com/cs/attachments/109769503/Wiring_Emergency_stop_SIL3_3SK2PN_group.zip