Seguridad CO2 · LogiCO2
LogiCO2 Mk9 CO2 central unit for controlling and supervising the system
The LogiCO2 Mk9 CO2 central unit kit 4A is the control center of the CO2 safety system: it receives data from the sensors, displays alarms, TWA and temperature, and allows you to monitor the overall operation of the installation.
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This central unit is intended for LogiCO2 installations where sensors already exist or where a CO2 safety system is going to be expanded. Its function is not to detect on its own, but to centralize sensor information, display system status, and manage alarm and fault signaling.
It is especially suitable for hospitality, technical rooms, wine cellars, breweries, beverage producers and any indoor space where CO2 is used, stored or distributed and where more structured supervision is required than with an isolated stand-alone sensor.
From an operational standpoint, it provides centralised readout, visual system status, audible warning, mute and reset button, and identification of the sensor generating the reading or alarm.
Key data
Artículo fabricante
0328
SKU Install Beer
LG005
Equipment type
CO2 safety system central unit
Communication
RS485 Modbus
Display
128x64 dot-matrix LCD
Power supply
12-24 V CC
Important: the specific datasheet for kit 0328 states monitoring of up to 8 sensors, while the general Mk9/Mk90 system documentation shows configurations of up to 12 sensors. If your project exceeds 8 sensors, it is advisable to confirm the exact configuration before purchasing.
Main features
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Centralized supervision Displays results, alarms and incidents from the connected sensors at a single control point.
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System control The central unit monitors overall operation and displays errors when a fault is detected.
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Clear on-screen reading Displays CO2, TWA and temperature; if there are several sensors, it identifies which sensor each reading comes from.
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Mute and reset button Allows you to mute the audible alarm and reset the alarm once the issue has been resolved.
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Status LED indicators Green LED for operation, yellow LED for fault, and red LED for alarm or alert.
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Compatibility with LogiCO2 sensors Designed to connect fixed LogiCO2 sensors; the official page also indicates compatibility with older MkVII sensors.
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Industrial communication Uses RS485 Modbus, a common architecture in technical monitoring systems.
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Multilingual The product documentation lists 19 languages and the official page lists multiple languages, including Spanish.
Technical specifications
Confirmed technical specifications of the LogiCO2 Mk9 CO2 central unit kit 4A
| Parámetro |
Dato confirmado |
| Brand |
LogiCO2 |
| Model |
Mk9 Central Unit Add-on KIT / Mk9 4A CO2 Central Unit Kit |
| SKU |
LG005 |
| MPN / artículo fabricante |
0328 |
| Equipment type |
Central unit for CO2 safety system |
| Main function |
Monitor LogiCO2 sensors, display readings and alarms, and control system operation |
| Declared capacity in kit 0328 datasheet |
Hasta 8 sensores |
| Capacity shown in general Mk9/Mk90 documentation |
Configurations from 1 to 12 sensors in the manual and up to 12 sensors on the main product page |
| Power supply |
12-24 V CC |
| Current consumption |
35 mA according to datasheet 0328 |
| Communication |
RS485, Modbus |
| Display |
128x64 dot-matrix LCD |
| Sound signal level |
70 dB (1 m) max. |
| Ambient temperature |
0–40 °C |
| Humidity |
0–90% non-condensing |
| Protección contra penetración |
IP54 according to data sheet 0328 |
| Dimensions |
90 x 161 x 38 mm |
| Weight |
Data not provided |
| Connections |
RJ45 wiring for power, communication and signalling |
| Indicators |
Green power LED, yellow fault LED and red alarm/warning LED |
| Displayed readings |
CO2, TWA (ppm) and temperature; it also identifies the sensor that originates the reading or the alarm |
| Front button |
Mute, reset and test |
| Languages |
Multilingual; data sheet 0328 lists 19 languages |
| Compatibility |
LogiCO2 sensors for fixed installation; the official page also indicates compatibility with older MkVII sensors |
| Scope of supply |
Mk9 CO2 central unit, 1 red 5 m cable, RJ45 1–2 splitter, Mk9 CO2 safety system sign, manual |
| Certifications and compliance |
CE, tested according to SS-EN 61000-6-3 and SS-EN 61000-6-2, manufactured in accordance with DIN 6653-2, system tested by TÜV-Rheinland and certified by UL |
Compatibility and use cases
This central unit is designed to work with fixed LogiCO2 sensors and centralize safety information in facilities where CO2 is used. It is especially useful in hospitality, cold rooms, wineries, breweries, plant rooms, beverage producers and other indoor spaces with CO2 distribution or storage.
Its operating logic makes sense when there is more than one monitoring point, when you want to identify from which sensor an alarm is coming, or when you need clearer supervision of the entire system.
To operate, it requires compatible sensors within the LogiCO2 ecosystem and a suitable wiring architecture. The product’s own official page indicates compatibility with fixed LogiCO2 sensors as well as older MkVII sensors.
Installation and considerations before buying
- First check how many sensors the system will actually manage, because sheet 0328 and the general documentation do not match in the stated maximum capacity.
- Check that the installation has compatible LogiCO2 sensors and the correct wiring topology.
- Choose the location of the central unit in a visible, accessible and protected area so it can be checked, muted, tested and reset.
- Confirm the available power supply: the unit operates at 12–24 V DC.
- If the system needs to display several sensors, make sure you correctly configure the number of connected sensors according to the manual.
- Also plan the alarm signage, beacons or sounders associated with the entire system, not just the central unit.
- As it is a safety device, installation and commissioning must be carried out with proper technical criteria and functional verification of the system.
Recommended maintenance and use
The central unit does not replace system maintenance: it is advisable to periodically check the condition of cables, connectors, LEDs, sounder and display, and verify that the central unit correctly receives and displays the information from each connected sensor.
The manual recommends testing the alarm to make sure that communication, warning lights and audible indicators are working. In the event of an alarm, the sounder can be muted briefly and a full reset must be carried out once the incident has been resolved.
Frequently asked questions
What exactly does this Mk9 central unit do?
Centralizes information from the CO2 safety system, displays sensor readings and alarms, controls system operation, and allows the alarm to be muted or reset.
Does it include CO2 sensors?
No. This kit corresponds to the central unit and its basic connection and signalling accessories. The sensors are supplied separately.
How many sensors can it monitor?
The data sheet for item 0328 states up to 8 sensors. The general Mk9/Mk90 documentation shows configurations of up to 12 sensors. For expansions, it is advisable to confirm the exact system configuration before purchasing.
What does kit 0328 include?
Includes the Mk9 central unit, a 5-metre red RJ45 cable, an RJ45 1-2 splitter, the Mk9 CO2 safety system sign and the corresponding documentation.
Can an alarm be muted from the central unit?
Yes. The unit has a front button for muting and reset. It also allows you to test the system directly from the device.
Which sensors is it compatible with?
It is intended for fixed LogiCO2 sensors. The official product page also indicates compatibility with older MkVII sensors.
