What HJÄRTA is

HJÄRTA S1 connects sensors, contacts and system signals with VAKTEN. It records states of doors, gates, hold-open systems, conveyor technology, cooling areas and other technical installations and makes them digitally visible.

Binary signals such as 0/1, open/closed or active/inactive can be connected – as well as measurement sensors, for example for temperature, angle or other state values.

Why existing systems need to become visible

A large part of existing hold-open systems, controls, doors and gates works in a decentralized way. Many things function, but very little is visible at a glance.

Technical services and operators therefore spend a lot of time checking assets, searching for faults or verifying states on site.

Are the gates closed?
Is the conveyor system blocked?
Is the goods temperature still correct?
Did someone leave the door open?

HJÄRTA gives a technical answer to these questions.

How HJÄRTA works

HJÄRTA is prepared for simple commissioning. Suitable sensors can be connected via Easy-Access ports, such as reed contacts, contact switches, light barriers or temperature probes.

HJÄRTA does not evaluate the system itself. It sees states: contact active or inactive, signal on or off, measurement value present or outside a defined range.

This information is transmitted to VAKTEN via the local WLAN. There, simple signals become understandable states, events and evaluations.

What VAKTEN does with it

In VAKTEN, a unit is created, for example a fire door, a gate, a cooling area or a conveyor section.

HJÄRTA sends the recorded signals. VAKTEN shows in real time whether a door opens or closes, whether an area is occupied, whether a temperature deviates or whether an expected state does not occur.

This creates cycles, state durations, target/actual comparisons and notifications – currently by e-mail, with mobile and SMS service in preparation – in case of deviations.

This makes even a large inventory of doors, gates, systems or cooling points visible at a glance.

Application areas

HJÄRTA is suitable for recording individual systems as well as complex sites – from a garage door to a hospital with hundreds of doors.

• Fire doors and hold-open systems
• Gates, curtains, flaps and closures
• Conveyor technology and logistics lines
• Medicine cabinets and cold rooms
• Cold chain monitoring
• Empties return and reverse logistics systems
• Turnstiles and access systems
• Special technical solutions in existing installations

Construction and interfaces

HJÄRTA S1 is a fully assembled electronic device between the installation and the evaluation layer.

Important: HJÄRTA is not a hold-open system and does not interfere with safety-relevant systems. It does not trigger alarms and does not influence them.

HJÄRTA is a basis for sensors that enables digital evaluation of individual or large and complex installations.

The Easy-Access ports are intended for simple, fast connection. Prepared 24 V sensors can be connected via Phoenix Push&Pull connectors.

For professional requirements, there is also a separate specialist area inside the enclosure. Signals and sensor lines can be connected there by qualified personnel.

Galvanic isolation via optocouplers protects the electronics and helps prevent interference between sensor network and device.

The display-supported multilingual setup makes commissioning transparent and reduces incorrect operation.

What makes HJÄRTA different

HJÄRTA is compact and not a mysterious cloud IoT solution. It sits where states occur: in the field.

It takes simple signals seriously and turns them into usable information. HJÄRTA sends a pulse every 60 seconds and a minimal data packet whenever a sensor state changes.

Example data packet:
24.03.2026 09:30 Channel 4:1
24.03.2026 09:30 Channel 4:2

The VAKTEN software translates this data into understandable states.

Who HJÄRTA is for

For operators, installers, door and gate manufacturers, fire protection partners, logistics sites and everyone who wants to see states in existing installations instead of merely assuming them.

First series notice

HJÄRTA S1 is in the controlled first-series phase.

Each unit is manually manufactured, tested and documented in Germany.