--- title: "How to Configure SR01 Security Relay on Akuvox Door Phones" slug: "how-to-configure-sr01-security-relay-on-akuvox-door-phones" status: "update" updated: 2026-08-06T06:38:08Z published: 2026-08-06T06:38:08Z canonical: "knowledge.akuvox.com/how-to-configure-sr01-security-relay-on-akuvox-door-phones" --- > ## Documentation Index > Fetch the complete documentation index at: https://knowledge.akuvox.com/llms.txt > Use this file to discover all available pages before exploring further. # Configure SR01 Security Relay on Akuvox Door Phones The SR01 security relay improves access security by controlling door locks directly from indoors. Unlike traditional systems, where the lock is connected to the door phone’s relay, someone may smash up the door phone and break into the door for illegal purposes like burglary. SR01 can prevent such malicious break-ins because it is installed indoors and controls the door opening directly. In this case, even if the door phone is destroyed, the door cannot be opened. The following devices with specific firmware versions or higher support connecting to SR01: | Model | Version | Model | Version | | --- | --- | --- | --- | | S539 | 539.30.1.105 | S538 | 538.30.10.705 | | S532 | 532.30.1.19 | S535 | 535.30.10.233 | | X910 | 2910.30.10.240 | X912 | 912.30.1.78 | | X915 V2 | 2915.30.1.14 | X916 | 916.30.10.110 | | R20 V3 | 220.30.4.5 | R20 V5 | 320.30.4.2 | | R25 Series | 25.30.10.117 | R29 | Higher than 29.30.3.203 | | R28 | 28.30.10.5 | R27 V2 | 227.30.4.4 | | E18 | 18.30.4.29 | E16 V2 | 216.30.0.52 | | E16 | 116.30.8.5 | E16 V3 | 416.30.11.206 | | E12 V2 | 312.30.2.109 | E12 | 12.30.2.110 | | A03 | 103.30.4.9 | A01/A02 | 101.30.4.37 | | A08 | 108.30.1.17 | A05 | 105.30.4.10 | ## Wiring You may refer to the following two videos for wiring. > [!NOTE] > Note > > - E12 has to be connected with SR01 in an exceptional way because it does not have RS485 ports. > - It is NOT recommended to use such a connection due to security. ### Connect Akuvox SR01 to Door Phone (with 12V Output) [YouTube video player](https://www.youtube.com/embed/Pcz-qCFQKyo?si=9VhFEqxi2Lem7J76) ### Connect Akuvox SR01 to Door Phone (via RS485) [YouTube video player](https://www.youtube.com/embed/c8UeeIcwIh0?si=f58zW_R00u1xAYIl) ## Configuration on the Device Web Interface Take the door phone X912 as an example. ### Connect Akuvox SR01 to Door Phone (with 12V Output) 1. Use the device IP to log in to its web interface. The default username and password are admin. 2. Go to **Access Control > Relay > Security Relay**. 3. Specify which relay is connected to the SR01 and check the **Enabled** box. 4. You can set the Trigger Delay and Hold Delay. - Trigger Delay: If you choose 5 seconds, the relay will be triggered 5 seconds after you press the Unlock tab. 0 means immediate trigger. - Hold Delay: If you choose 5 seconds, the relay will remain activated for 5 seconds after it is triggered. ![](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/image-QYZ0GPKN.png) 1. Scroll down to **12V Power Output** and select **Security Relay A** in Power Output Type. ![](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/image-RH996BRM.png) 1. Click Submit to save the configuration. 2. Run the test as shown in the video, or click **Test** of **Security Relay A**. When the green light of SR01 is flashing quickly, SR01 and the door phone are pairing successfully. ![](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/image-DU0DTE76.png) ### Connect Akuvox SR01 to Door Phone (via RS485) 1. Use the device IP to log into its web interface. The default username and password are admin. 2. Go to **Access Control > Relay > Security Relay**. 3. Check the **Enabled** box of **Security Relay B** since the door phone and the security relay are connected via RS485 ports, and Security Relay B's server mode is RS485. 4. You can set up Trigger Delay and Hold Delay. - Trigger Delay: If you choose 5 seconds, the relay will be triggered 5 seconds after you press the Unlock tab. 0 means immediate trigger. - Hold Delay: If you choose 5 seconds, the relay will remain activated for 5 seconds after it is triggered. ![](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/image-6IKU6UUY.png) 1. Click Submit to save the configuration. 2. Go to **Device > RS485** interface and set **Apply RS485 Setting To** to **Others**. ![](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/image-LBW8Z7U4.png) > [!NOTE] > Note > > - After the security relay is configured, you need to add users and assign them credentials to open the SR01. > - You may refer to [Open Doors](https://knowledge.akuvox.com/docs/unlock-door) for adding users. > - E18 does not support the **Hold Delay** option. ### Upgrade SR01 You can upgrade SR01 on the device’s web interface when SR01 is connected via RS485. > [!NOTE] > Compatible models and versions(or higher): > > - X912: 912.30.11.49 > - R29: 29.30.10.432 > - X915V2: 2915.30.10.625 > - S538: 538.30.10.705 > - S539: 539.30.10.507 > - A08: 108.30.11.226 Before upgrading, make sure the device is connected properly and powered on. 1. Go to the **Device > RS485** interface and set **Apply RS485 Setting To** to **Others**. 2. Click **Connect** to detect the SR01. 3. Click **Upgrade** to upload the .rom file. Please contact the Akuvox tech support for the firmware. ![](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/image-1L8XZ925.png) “Upgrade Successful” will display after the upgrade. ### Apply Relay Schedule to SR01 The relay schedule can keep the SR01 open at a scheduled time. > [!NOTE] > Note > > - The following device models with specific firmwares or higher support this feature: > - X912: 912.30.11.57 > - E12: 312.30.10.229 > - R20 Series: 320.30.11.37 > - R28: 228.30.10.213 > - X915V2: 2915.30.10.625 > - A08: 108.30.11.226 > - The SR01’s version should be V15 or higher. Click [here](https://knowledge.akuvox.com/docs/sr01-firmware) to download the firmware and refer to [Upgrade SR01](/v1/docs/how-to-configure-sr01-security-relay-on-akuvox-door-phones#upgrade-sr01) for upgrading it. 1. Go to the **Access Control > Relay > Relay Schedule** interface. 2. Check the Enabled box and select the security relay. 3. Apply a schedule by moving it from the left to the right box. ![](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/image-Y80DQ8DQ.png) ## Configuration on SmartPlus Platform When the device is connected to the SmartPlus Cloud, you can set up SR01 on the SmartPlus platform. ### Single-Family Projects 1. Log in to the SmartPlus platform with an installer account. 2. Click **Single-Family Sites** on the dashboard. 3. Click ![](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/图片-Z29JORMC.png) of the target user. Click **New** to add a device or click ![](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/image-BFFWSOIT.png) to modify a device. 4. Find **Add Security Relay** and click it. 5. Customize the relay name. Select the DTMF code and access methods. > [!NOTE] > Note > > - The DTMF code should be the same as that on the device’s web interface. > - To check it, navigate to the **Access Control > Relay > Security Relay** interface. ![](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/image-8RXPD8GK.png) ### Community Projects 1. Log in to the SmartPlus platform with an installer account. 2. Click Communities on the dashboard and navigate to the target community by clicking![](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/image-OJ247HYK.png) . 3. Navigate to where the device is installed and click **Intercom Devices**. 4. Click **New** to add a device or click ![](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/image-BFFWSOIT.png) to modify a device. 5. Find **Add Security Relay** and click it. 6. Customize the relay name. Select the DTMF code and access methods. > [!NOTE] > Note > > - The DTMF code should be the same as that on the device’s web interface. > - To check it, navigate to the **Access Control > Relay > Security Relay** interface. ![](https://cdn.document360.io/f09a6106-e976-455e-b2d0-3d88b5385960/Images/Documentation/image-8RXPD8GK.png)