New features for EN54 Line: faster commissioning, simpler maintenance, and compliance updates

The OS Malevich 2.40 update introduces a variety of improvements to EN54 Line. These include new features that speed up commissioning, simplify maintenance, and strengthen compliance with industry standards. Let's take a closer look at what's new and how it works.

Device fault and disablement as scenario triggers

In fire alarm systems, devices can lose communication, report faults, or be temporarily disabled. While these events require attention, they do not usually trigger an automated response. Previously, only EN54 I/O Module (2X2) Jeweller featured a Fail-safe mode for outputs. In the event of a fault, the module would unlock emergency exits or enable emergency lighting and remain in that state until the fault was resolved. As a result, the system would be prepared for safe evacuation should an actual fire occur.

With this update, other EN54 Line devices can also be configured to trigger scenarios in response to faults and disablements. For example, if a fire detector goes offline or is disabled, the system can activate a sounder, VAD, or I/O module to signal the issue. These scenarios use a non-alarm sound pattern, helping people on site distinguish a technical issue from a real emergency.

Automated responses to faults and disablements help ensure that technical issues do not go unnoticed. Rather than relying solely on manual monitoring, the system can immediately signal issues and draw attention to devices that require inspection or servicing. This approach also supports compliance with regional requirements such as BS 7273-4, which defines how fire protection measures must operate in response to faults and other system events.

Learn more about fire scenarios triggered by device faults and disablements

CIE power supply testing

Power supply testing is a mandatory part of fire alarm system maintenance. It is typically performed during commissioning and repeated at least once a year. Traditionally, this is a time-consuming process that requires manual measurements made with additional tools, such as a multimeter or battery load tester.

With EN54 Fire Hub Jeweller, testing can be carried out directly from the CIE's touch screen, with no external equipment or additional procedures required. The test examines both the mains power supply and the battery. Upon completion, the test result is displayed on the screen.

How to run a power supply test on EN54 Fire Hub Jeweller

Fireman key switch integration

Beyond global fire safety standards such as EN 54, Ajax also complies with local regulatory requirements in different markets. In Sweden, for example, the SS 3654:2016 standard defines multiple access levels for CIE management. According to the standard, critical actions — such as muting alarms or resetting the system — must be available only to authorized personnel and performed using a physical fireman key.

In practice, when an authorized user needs to control the system, they insert a key into a fireman switch. Once the switch is activated, the Ajax system grants the user access to the CIE screen, enabling them to perform critical actions. When the key is removed from the switch, access is automatically restricted again.

To meet the requirements of SS 3654:2016, Ajax has introduced integration with third-party fireman key switches. These switches typically use potential-free dry contacts and can be connected via EN54 I/O Module (2X2) Jeweller. The interaction logic is already built into the system. Installation engineers only need to connect and configure the switch in the I/O module settings — no custom setup or additional programming required.

How to connect a third-party fireman key switch to EN54 I/O Module (2X2) Jeweller

How to configure a third-party fireman key switch