--- title: Connecting a Secure I/O Controller description: How to connect a Secure I/O Controller to the Alocity AI-1000 Intercom --- [Skip to content](https://help.alocity.com/knowledge/connecting-a-secure-i/o-controller#main-content) English Show submenu for translations [SUBMIT A TICKET HERE](https://help.alocity.com/knowledge/kb-tickets/new?hsLang=en) ![NEW_LOGO.png\]](https://help.alocity.com/hs-fs/hubfs/NEW_LOGO.png?height=40&name=NEW_LOGO.png) Open main navigation Close main navigation - English Show submenu for translations - [SUBMIT A TICKET HERE](https://help.alocity.com/knowledge/kb-tickets/new) - Go to alocity.com Go to alocity.com Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Alocity Help Center (Knowledge Base)](https://help.alocity.com/knowledge?hsLang=en) 2. [AI-1000 Installation, Setup And Configuration](https://help.alocity.com/knowledge/ai-1000-installation-setup-and-configuration?hsLang=en) 3. [I/O Controller Installation](https://help.alocity.com/knowledge/ai-1000-installation-setup-and-configuration?hsLang=en#i-o-controller-installation) # Connecting a Secure I/O Controller ## How to connect a Secure I/O Controller to the Alocity AI-1000 Intercom A Secure I/O Controller is a crucial component for perimeter door access control systems, designed to prevent tampering with the wiring of the access control reader when connected directly to a lock. The Secure I/O Controller enhances security by connecting the access control reader, such as the Alocity AI-1000 Intercom, to the door lock and additional components like push buttons or door contacts via encrypted RS485 communication. In simpler terms, the Secure I/O Controller serves as a protective intermediary between the reader and the door lock, ensuring that unauthorized individuals cannot tamper with the wiring to gain access. This additional layer of security is especially important for perimeter door access control systems, where components are more exposed to potential security risks. It is important to consider that the Secure I/O Controller will require an external power source with the following minimum requirements: 12 Volts 100mA.\* DC (Operational). **Follow these steps to properly wire the Alocity AI-1000 Intercom to a Secure I/O Controller:** 1. Connect the RS485-A (Pink) wire to the positive (D+) port on the controller. 2. Connect the RS485-B (White) wire to the negative (D-) port on the controller. 3. Connect the Ground (Black) wire to the negative (GND) port on the controller. 4. Connect the power source negative (-) wire to the negative (-) port on the controller. 5. Connect the power source positive (+) wire to the positive (+) port on the controller. Now you are ready to pair the AI-1000 Intercom with the Secure I/O Controller (instructions on next page). ![](https://help.alocity.com/hs-fs/hubfs/image-png-Aug-15-2024-08-51-59-5667-PM.png?width=514&height=272&name=image-png-Aug-15-2024-08-51-59-5667-PM.png) - [Quick Start Guides](https://help.alocity.com/knowledge/quick-start-guides?hsLang=en) - [Alocity Control Center Guide](https://help.alocity.com/knowledge/alocity-control-center-guide?hsLang=en#main-content) - [Software and Account General Setup](https://help.alocity.com/knowledge/alocity-control-center-guide?hsLang=en#software-and-account-general-setup) - [Video Security Management](https://help.alocity.com/knowledge/alocity-control-center-guide?hsLang=en#video-security-management) - [User and Group Management](https://help.alocity.com/knowledge/alocity-control-center-guide?hsLang=en#user-and-group-management) - [Access Control Management](https://help.alocity.com/knowledge/alocity-control-center-guide?hsLang=en#access-control-management) - [Intercom Management](https://help.alocity.com/knowledge/alocity-control-center-guide?hsLang=en#intercom-management) - [Alocity 1id Mobile App Guide](https://help.alocity.com/knowledge/alocity-1id-mobile-app-guide?hsLang=en#main-content) - [Resident & tenant guide](https://help.alocity.com/knowledge/alocity-1id-mobile-app-guide?hsLang=en#resident-tenant-guide) - [Mobile Credential Users and Super Admins Guide](https://help.alocity.com/knowledge/alocity-1id-mobile-app-guide?hsLang=en#mobile-credential-users-and-super-admins-guide) - [AiVR Installation, Setup And Configuration Guide](https://help.alocity.com/knowledge/aivr-installation-setup-and-configuration-guide?hsLang=en#main-content) - [First Steps](https://help.alocity.com/knowledge/aivr-installation-setup-and-configuration-guide?hsLang=en#first-steps) - [Setup and configuration](https://help.alocity.com/knowledge/aivr-installation-setup-and-configuration-guide?hsLang=en#setup-and-configuration) - [F3D100 Installation, Setup And Configuration Guide](https://help.alocity.com/knowledge/f3d100-installation-setup-and-configuration-guide?hsLang=en#main-content) - [First Steps](https://help.alocity.com/knowledge/f3d100-installation-setup-and-configuration-guide?hsLang=en#first-steps) - [F3D100 Installation and Wiring](https://help.alocity.com/knowledge/f3d100-installation-setup-and-configuration-guide?hsLang=en#f3d100-installation-and-wiring) - [I/O Controller Installation (F3D100)](https://help.alocity.com/knowledge/f3d100-installation-setup-and-configuration-guide?hsLang=en#i-o-controller-installation-f3d100) - [Connecting the F3D100 to 3rd Party readers and controllers](https://help.alocity.com/knowledge/f3d100-installation-setup-and-configuration-guide?hsLang=en#connecting-the-f3d100-to-3rd-party-readers-and-controllers) - [AI-1000 Installation, Setup And Configuration](https://help.alocity.com/knowledge/ai-1000-installation-setup-and-configuration?hsLang=en#main-content) - [First Steps](https://help.alocity.com/knowledge/ai-1000-installation-setup-and-configuration?hsLang=en#first-steps) - [AI-1000 Installation and Wiring](https://help.alocity.com/knowledge/ai-1000-installation-setup-and-configuration?hsLang=en#ai-1000-installation-and-wiring) - [I/O Controller Installation](https://help.alocity.com/knowledge/ai-1000-installation-setup-and-configuration?hsLang=en#i-o-controller-installation) - [Mercury Intelligent Controller Installation, Setup And Configuration Guide](https://help.alocity.com/knowledge/mercury-intelligent-controller-installation-setup-and-configuration-guide?hsLang=en#main-content) - [First Steps](https://help.alocity.com/knowledge/mercury-intelligent-controller-installation-setup-and-configuration-guide?hsLang=en#first-steps) - [FAQ'S](https://help.alocity.com/knowledge/faqs?hsLang=en#main-content) - [Frequently Asked Questions (FAQ'S)](https://help.alocity.com/knowledge/faqs?hsLang=en#frequently-asked-questions-faqs) - [Common Problems Troubleshooting](https://help.alocity.com/knowledge/faqs?hsLang=en#common-problems-troubleshooting) - [Release Notes And Versions History](https://help.alocity.com/knowledge/release-notes-and-versions-history?hsLang=en) # Alocity alocity.com Help Center Copyright © 2026, Alocity