Integration via Ajax System: Topology, Hardware Base, and Configuration
The implementation of gate control through the Ajax ecosystem is based on the concept of clear separation of functional blocks: direct transmission of low-current control commands (open/close), continuous physical state monitoring (opened/closed), and preventive high-voltage power control.
Control Modules: Relay and MultiRelay Architecture
The primary hardware tool for sending commands to the gate microcontroller are modules with galvanically isolated contacts. The company offers two main classes of devices: the wireless single Relay Jeweller and complex modules for wired systems, Superior MultiRelay Fibra and MultiTransmitter IO (4X4) Fibra, which feature inputs for receiving signals and outputs for control. The uniqueness of these relays lies in their ability to generate a short-term closing pulse (for example, lasting from 0.5 to 1 second), perfectly simulating the physical pressing of a button on a standard remote control or wall switch.
The engineering approach to wiring is determined by the configuration of the drive board itself. In the case of using a combined control input (step-by-step scheme typical for contacts 1 and 7 of the FAAC 740D drive), only one relay channel is used. Each pulse sent via the Ajax mobile app cyclically changes the gate status. However, a more reliable approach from a remote control perspective is the use of separate inputs. If the board supports individual channels for “Open only” and “Close only” commands, a connection scheme using two separate Relay Jeweller devices (or two dedicated channels of a MultiRelay Fibra module) is applied. With this topology, one relay is physically integrated into the opening circuit, and the second — exclusively into the closing circuit. This setup completely eliminates the risk of logical desynchronization: pressing the virtual “Close gate” button in the smartphone app is guaranteed to result in the structure closing, regardless of its current intermediate position.
State Monitoring: Feedback via Magnetic Contact Detectors
A fundamental rule of safe automation is understanding that sending an electronic control pulse to the motor does not guarantee the actual physical movement of the massive leaf. Movement can be blocked due to an object entering the zone of infrared photocells (triggering a reverse), the gate panel freezing to the guides in winter, or a mundane lack of power at the facility. Accordingly, providing reliable feedback on the real status of the gates is a critical task.
In the Ajax system, this task is solved by using a wireless DoorProtect Jeweller magnetic contact detector (or its DoorProtect Plus modification, which contains an accelerometer). The functional element of this device is a sealed magnetic reed switch. It consists of ferromagnetic contacts placed in a glass bulb, which form a continuous electrical circuit under the influence of a constant magnetic field. When the magnet is moved away, the circuit breaks, and the device instantly registers the status change, transmitting an alarm signal to the hub. Two magnets are supplied in the kit: a small one operates at a distance of up to 1 centimeter, and a large one — up to 2 centimeters (which is important when mounting on vibrating metal structures).
For the specific conditions of outdoor entrance groups, where using a standard plastic detector casing directly on the gate leaf is impractical due to the harsh environment, an engineering trick is applied. The DoorProtect detector has a special remote terminal block on the back panel for connecting any third-party wired detector with a normally closed contact type. Installers mount a heavy-duty industrial metal outdoor reed switch directly on the support pillar and gate leaf, and route the wires from it inside the protected housing of the gate electric drive, where the DoorProtect module itself is located. Such integration allows the system to reflect the external contact status in the app with perfect accuracy: the user sees an animation and text indicating whether the gates are currently open or closed.
For larger-scale tasks, when it is necessary to connect multiple wired detectors or integrate an existing complex perimeter security system, the Ajax Transmitter integration module is used. It transforms signals from third-party wired sensors into the encrypted Jeweller protocol, eliminating the need to completely replace the existing infrastructure. DoorProtect and Transmitter are powered by pre-installed lithium batteries, which, thanks to energy-efficient algorithms and adjustable polling intervals, provide up to 7 years of autonomous operation. The charge status of these batteries is continuously monitored and is always accessible in the mobile app.
A unique feature that enhances everyday comfort when using this pairing is the “Chime” function. It turns the gate opening detector, in combination with an outdoor or indoor Ajax siren, into a smart analog of a doorbell. When the security system is in the disarmed mode, the siren notifies the homeowners about the physical opening of the gates with special short beeps. Users with advanced professional rights can fine-tune the volume of these signals at 3 different levels, allowing them to instantly identify exactly which door or gate on the property has just opened without having to check their smartphone.
Preventive Security: Power Management
Parallel to low-current control, the ecosystem allows the implementation of an unprecedented level of protection through hardware power control of the gate microcontroller itself. A WallSwitch Jeweller power relay or an equivalent Fibra high-voltage module is connected in series to the 220 Volt power circuit.
This solution acts as a “cyber-physical breaker.” During prolonged owner vacations or at night, an automatic scenario can completely de-energize the gate electric drive. The lack of power makes the gate mechanism absolutely immune to cyberattacks, such as intercepting and cloning the radio signal of the standard key fob using code grabbers. Even possessing a hacked code, an intruder will not be able to activate a de-energized motor. An additional advantage is the ability to remotely hard-reboot the gate control board in case of software freezing, eliminating the need for physical access to the electrical panel.
Comprehensive Perimeter Protection and Automation
Expanding the system beyond indoor spaces was a significant strategic step by the developers. The addition of outdoor protection devices to the lineup, such as innovative motion detectors, made it possible to build complex logic around automated gates. The MotionProtect Outdoor model is equipped with a sophisticated two-phase digital false alarm protection algorithm that ignores the movement of pets and natural interferences (rain, snow, swaying branches) and features an advanced anti-masking system (protection against painting over or covering the lens). For narrowly targeted control of approaches along a long line of “Mehbud” fences, the DualCurtain Outdoor bidirectional curtain detector, capable of monitoring up to 30 meters of perimeter, is ideal. This device features two optical systems in a single slim, waterproof housing, patented lens systems, and a 3-degree vertical viewing sector shift function, allowing the beam to bypass architectural protrusions on the fence facade. The detection distance and sensitivity of each side of the sensor can be individually adjusted in the app. Upon detecting an intrusion, these detectors can not only activate a powerful Superior StreetSiren Fibra outdoor siren—whose visual (LED flashes) and acoustic signals scare off intruders—but also initiate automatic scenarios, for example, forced immediate gate closure and power block.
Regarding contactless automation, the system supports Geofence features. The boundaries of this virtual zone are set on an interactive map directly in the app. The smartphone’s mobile operating system registers the crossing of this zone boundary using satellite navigation and notifies the app. However, guided by strict corporate security standards, the system natively blocks the ability to automatically disarm or physically open the gates based solely on geolocation. This is due to the technology’s vulnerability to coordinate spoofing and the risk of smartphone theft. Instead, the app sends an interactive push notification prompting you to disarm the system or activate the corresponding scenario. Convenient automation is configured in the scenarios section: you can link a disarming event (e.g., entering a code on the keypad or pressing a button on a compact key fob) with the automatic closing of relay contacts, leading to smooth gate opening upon entry. Closing the gates on a strict time schedule is also available.