Which door phone support using security relay? #June

E16 & E18
X916, X915 & X912
R29, R28, R27, R20K, R20B & R20A

You'll need to ensure you're on the latest firmware and the option should appear within the Intercom/Device -> Relay settings.

Hi Finn，
SR01 supports use with all door phones with the newest version except R28, X916, E11, and E21.
SR01 supports use with A01, A02, and A03 access control with the newest version.

Does the S539 Model support SR01?

Yes, the S539 supports SR01.

sure?, because i have tried to start the SR01 Module with S539 (with 12V Output Method) but it didnt start. I have done according to the instructions like Video https://www.youtube.com/watch?v=FKsk0qsr_kI is showing but it didnt start and no green lightning is flashing slowly. I thought than the S539 doesn't support SR01, because Akuvox website https://akuvox.com/productsDisp?pid=74 supported list of the door models for S01 is not showing S539. By the way have Firmware Version: 539.30.110.118.

ok, finally i was able to start to SR01 Modul, iam trying now to set up Door Look Function.