A：
To ensure the compatibility of the door lock and the safety control system, it is recommended to start from the following key aspects:
✅ 1. Electrical interface matching
· Check whether the voltage level of the door lock (such as 24V DC) is consistent with the control system.
· Check whether the input/output type (NPN/PNP, dry contact/active signal, etc.) is compatible.
· Ensure that the terminal type (such as M12, screw terminal) matches the wiring method.
✅ 2. Signal protocol and feedback function
· The door lock should have a lock/unlock status feedback signal (usually a safety contact).
· If the control system uses a safety relay or safety PLC, it is necessary to verify whether the feedback signal of the door lock supports dual-channel redundancy and safety certification (such as PLe or SIL 3).
✅ 3. Control logic compatibility
Ensure that the operating logic of the door lock is consistent with the logic flow of the safety control system, for example:
· Is the power off locked or released?
· Under what conditions is unlocking allowed?
· Is emergency unlocking or manual release supported?
✅ 4. Safety level matching
· Confirm that the safety level (such as PLe, SIL2/3) of the door lock meets the overall system requirements.
· The selected door lock must be certified and achieve the expected safety performance level together with other safety components (light curtain, emergency stop, etc.).
✅ 5. Compatible communication methods
· If the door lock has communication interfaces such as RS485, IO-Link, PROFINET, etc., make sure that the control system has the corresponding communication module.
· Some smart locks have remote diagnosis/control functions, and the controller should also have corresponding support.
✅ 6. Manufacturer recommendations and test verification
· Preferably choose door lock models that have been verified to be compatible with your control system brand.
· Perform on-site testing before integration or obtain compatibility recommendations and wiring diagrams from the manufacturer.
If necessary, I can help you recommend compatible door lock models and wiring solutions based on the usage scenario.
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