# AC42 Door Controller An easy-to-install and manage four-door controller for cloud-control of doors, auxiliary devices and integration with your fire alarm interface. [Start free trial](/content/try/access-control/index.html) ## AC42 Four-Door Controller The AC42 Four-Door Controller brings plug-and-play simplicity to enterprise-grade access control. The AC42 supports existing door hardware and card readers while enabling cloud-based visibility into your building's doors and access events. Integration with building fire alarm interface (FAI) systems and auxiliary devices allows organizations to connect with existing infrastructure for seamless deployments. ## Key features ###### Instant video integration and insights ###### Fire alarm interface support ###### Cloud-based software and management ###### Works with existing cards and readers ## Cloud-managed access controller Built from the ground–up, the AC42 provides security without the complexity. Available in a versatile four-door form factor, the AC42 provides the best of on-prem security and cloud-based scalability. ### Simple to manage Cloud–managed controller configures instantly and updates automatically. No patching, manual updates or IT overhead required. ### Always reliable, at scale On-device compute, storage and backup battery power source ensures uninterrupted door functionality, regardless of internet or power connectivity. ### Centralized management Manage doors, permissions and users from anywhere with Verkada Command. No on-prem servers or databases required. ### Increased visibility and control Native integration with Verkada Cameras, Guest, Sensors and more provides unparalleled visibility across your organization. ## Access simplified Built from the ground up for simple installation and management One unit, 4 door inputs, two AUX ports, and an FAI connection All-in-one access control unit - no servers, clients or databases required Thoughtful design simplifies installation and maintenance ## Frequently asked questions **What is included with the AC42?** The AC42 is an all-in-one access control unit that is designed to work with all standard door hardware and most readers. The AC42 allows customers to upgrade their system to Verkada by simply replacing their existing Access Control panels. Every component of the AC42 is designed to make it faster for installers to connect doors and enable customers to better manage and troubleshoot doors across their organization. A backup battery is also available to power the unit in the event of power loss. **What are the benefits of the AC42?** With the Verkada AC42, users can bring plug–and–play simplicity to managing doors and access across their organization. The AC42 access controller works with your building’s existing door hardware, readers, fire alarm systems, as well as Verkada card readers. Once doors are connected, all doors are ready to be managed from any device via Verkada Command. **Does the AC42 work if there is a power or internet outage?** The AC42 is built on Verkada’s hybrid cloud architecture, balancing the best of on-device security with the scalability and connectivity of the cloud. The AC42 features storage and compute capabilities, and securely caches all events, settings, and door lock schedules on-device. In the event of an internet outage, the device will continue to function. Additionally, you can deploy the AC42 with the ACC–BAT–4A to power all connected doors – both wet or dry – in the event of a power outage. **How does the AC42 integrate with other Verkada products?** Verkada’s AC42 integrates natively with other Verkada products including Cameras, Alarms and Intercom. With the AC42, you can natively pair doors and security cameras to instantly get video security context on all access events including badge scans, door opens, and door tampering. With Verkada Alarms, you can trigger building lockdowns in response to alarm triggers like panic buttons. With Intercoms, you can receive intercom calls and unlock doors from Command, the Verkada Pass app and the Verkada Desk Station. **What hardware do I need to secure my buildings?** With Verkada Access Control, the only hardware you need is an access controller such as the AC42 or our 16-door AC62, and door locking / unlocking hardware such as maglocks, card readers and wireless door locks. Once connected, you can manage building access, schedules, and users directly in Verkada Command – no additional servers, databases or configurations needed. ## Product specifications [Datasheet](https://docs.verkada.com/docs/door-controller-ac42-datasheet.pdf) [Install guide](https://docs.verkada.com/docs/access-control-ac42-quick-start-guide.pdf) Power and network **Power consumption** 60W maximum **AC power input** 100-240VAC 50/60Hz 1.5A maximum **Inputs** 2x REX dry inputs per door 1x DPI dry input per door 2x auxiliary dry inputs **AUX power** 1x 12V @ 250mA **Connectivity** Ethernet: 100/1000Mbps RJ-45 for network connection USB 2.0 **Reader and relay ports** **Readers** 1x reader port (Verkada/RS-485 or Wiegand) per door Reader current consumption must be < 250mA per reader Note: max of 4 readers can be powered simultaneously **Relay outputs** 1x wet or dry relay per door Wet relay switch-selectable power: - 12V operation 700mA max - 24V operation 350mA max Dry relay max pass-through power: - 24VDC @ 2A (resistive load) 2x auxiliary dry relays **Compliance and availability** **Availability** FCC, ICES, UKCA, CE, RCM, VCCI, KCC, BIS, NOM, UL/cUL/IEC 62368-1, UL294, MoE, FY2019 NDAA compliant, ICASA **Compliance & Safety** For hardware certification information, please visit [verkada.com/compliance](/content/compliance/index.html) **General** **Dimensions** Height: 417.0mm / 16.4in Width: 321.omm / 12.6in Depth: 116.3mm / 4.6in **Mounting options** Mounting plate and four wood screws **Weight** 6.4kg / 13.9lbs **Operating temperature** 0°C - 50°C 5 - 90% Humidity **Included accessories** Lock key and flat head screwdriver