MultiRelay Fibra is a relay module designed to implement complex wiring diagrams. It has four relays with potential-free (dry) contacts that can control four separate circuits independently. MultiRelay can integrate various appliances, electrical mechanisms and even third-party security devices into the Ajax system. With Ajax scenarios, the module provides fully automated actions in response to alarms and security mode changes or performs them by a specified schedule.
Smart security and comfort

Use automation scenarios to make life safer and more comfortable. Set your office lights to turn off automatically on arming. Program your projectors to turn on when outdoor motion detectors identify intruders. Or turn on your toaster at a certain time in the morning.

5 automation elements with MultiRelay

4 separate circuits control

The module has four relays that can control four separate circuits independently, meaning it can maintain four different appliances or electric mechanisms. Automation scenarios can be configured for each relay separately. Also, several relays can be connected to control one device if required by the wiring scheme.

Impulse and bistable modes

Each relay supports two operation modes:
Bistable — the relay changes contact state after each activation, turning the connected appliance on or off.
Pulse — the relay changes contact state for the adjustable time (from 10 s to 2 h).

The mode can be configured in Ajax apps for each relay separately.

Steady contact state

The device retains the current contact state of a relay. After a power loss and subsequent restoration, the contact state remains unchanged. The feature can be activated in Ajax apps for each relay separately.

Support for both AC and DC circuits

The module has relays with potential-free (dry) contacts and can control circuits with direct, alternating, or no current.

Configurable NC/NO contact states

Each relay supports two contact states:
Normally closed (NC) — the relay stops supplying power when activated and resumes when deactivated.
Normally open (NO) — the relay supplies power when activated and stops when deactivated.

The normal contact state can be configured in Ajax apps.

One multi-purpose casing

The convenience for PROs is a big priority, so Ajax products are always thought out to every detail, hence easy to work with. That’s why we created Case, a one-stop casing suitable for module-type Fibra devices. Various size options facilitate combining multiple modules, optimizing space and reducing installation expenses. MultiRelay is compatible with Case2 and can be installed in a single casing with other devices.

Unique wired technology

The Ajax system uses secure two-way communication based on the Fibra proprietary protocol. It features encryption and device authentication to prevent sabotage, spoofing, or data theft. Fibra lines are multifunctional and support connecting different types of devices to one line: sirens, keypads, and detectors with photo verification.

Up to 2,000 m1 of wired communication with a hub
One line for different types of devices
Protection against sabotage and spoofing

Energy efficiency as a priority

Fibra communication requires minimum power consumption: the module consumes only up to 0.18 W at its peak. Fibra also follows the TDMA principle. Each device has a short time frame to exchange data with a hub, and its communication module is inactive the rest of the time. This significantly reduces power consumption and helps avoid interferences even when multiple devices communicate simultaneously.

Power consumption of up to 0.18 W
TDMA and power-saving mode