Ajax MultiRelay Fibra Four-Channel Wired Relay Module

Ajax MultiRelay Fibra Four-Channel Wired Relay Module

The Ajax MultiRelay Fibra is a wired automation module built to bring remote power control to almost any electrical circuit within an Ajax security system. Fitted with four independent relays using potential-free (dry) contacts, it lets installers trigger sirens, gates, lighting, irrigation systems, locks and other third-party equipment directly from the Ajax app or through automated scenarios, all over the secure, encrypted Fibra wired protocol.

Key Features

• Four independent relays with dry contacts, each capable of controlling a separate circuit on its own schedule or trigger.
• Bistable or pulse operating modes so each relay can act as a simple on/off switch or a momentary trigger.
• Configurable NC/NO contact status and a maximum resistive load of 5 A at 30 V DC or 10 A at 110-230 V AC per relay.
• Runs on the encrypted, two-way Fibra wired communication protocol, resistant to jamming, spoofing and line sabotage.
• Long wired range, supporting Fibra line lengths of up to 2,000 metres from the hub or previous device.
• Built-in temperature protection that automatically opens all closed contacts if a relay overheats, with app notifications for the user and monitoring company.
• Configurable behaviour after a power outage, allowing contacts to hold their previous state or reset to normal.
• Tamper detection available when installed into an Ajax Case enclosure (sold separately), which also tidies wiring and houses multiple Fibra modules.
• Powered directly from the Fibra line (8.5-30 V, up to 185 mW), with no separate power supply required for the module itself.

Typical Applications

MultiRelay Fibra suits installations where a security system needs to interact with third-party electrical equipment, such as triggering a fog cannon on a panic alarm, switching a wired siren, opening a gate or barrier, cycling irrigation valves, or automatically switching off office lighting when the site is armed. Because each relay operates independently, a single module can manage several unrelated automation tasks at once, reducing wiring complexity on larger commercial or residential sites.

What's in the Box

• MultiRelay Fibra module
• Mounting accessories
• Quick start guide

Frequently Asked Questions

Does MultiRelay need its own power supply? No, the module draws its operating power directly from the Fibra line, though the appliances it switches are powered separately through their own circuits.

Can it be used outdoors? No, MultiRelay Fibra is designed for indoor installation only and should be protected from moisture and extreme temperatures.

Is a casing required? An Ajax Case is recommended rather than mandatory; it provides tamper protection, tidy wire routing and the option to house several Fibra modules together.