Datasheet

14
G
AERASGARD
®
RFTM - LQ - CO
2
- Modbus Rev. 2019 - V23
The maintenance-free, microprocessor-controlled AERASGARD
®
RFTM - LQ - CO
2
- Modbus and RCO
2
⁄ RLQ - CO
2
⁄ RFTM - CO
2
- Modbus with Modbus
connection, with ⁄ without optional display, in an elegant enclosure, plastic, with snap-on lid, base with 4-hole attachment, is used to to monitor the entire
room climate. For this purpose, measurands air humidity, temperature, CO
2
concentration as well as air quality (VOC) are measured. A setpoint potentiometer
is optionally available as an operating element. By using a single device to monitor all four measurands, it is possible to effectively monitor and regulate the
entire room climate. It measures CO
2
in the range of 0...5000 ppm, VOC at one of three selectable sensitivity levels LOW / MEDIUM / HIGH, temperatures
in the range of 0...+50°C, as well as relative air humidity from 0...100 % r.H.
A digital, long-term stable sensor used as measuring element for relative air humidity and temperature guarantees exact measurement results. The air
quality is determined based on a (VOC) gas mixture sensor. The CO
2
content of the air is measured using an optical NDIR sensor (non-dispersive infra-red
technology).
TECHNICAL DATA
Voltage supply: 24 V AC ⁄ DC (± 10 %)
Power consumption: < 4.4 W ⁄ 24 V DC typical; < 6.4 VA ⁄ 24 V AC typical; peak current 200 mA
Data points: temperature [°C], relative humidity [% RH]
air quality (VOC) [%], carbon dioxide (CO
2
) [ppm]
and setpoint potentiometer
HUMIDITY
Sensors: digital humidity sensor with integrated temperature sensor,
low hysteresis, high long-term stability
Operating range, humidity: 0...95 % r. H. (without dew formation)
Deviation, humidity:
typically ± 2.0 % (20...80 % r. H.) at +25 °C, otherwise ± 3.0 %
TEMPERATURE
Operating range, temperature: 0...+ 50 °C
Deviation, temperature:
typically ± 0.2 K at +25 °C
AIR QUALITY (VOC)
Sensor, VOC : VOC sensor (metal oxide) with automatic calibration
(VOC = volatile organic compounds)
Measuring range, VOC : 0...100 % air quality; referred to calibrating gas;
multi-range switching VOC sensitivity low, medium, high
Measuring accuracy, VOC : ± 20 % of final value (referred to calibrating gas)
Service life: > 60 months (under normal load conditions)
CARBON DIOXIDE (CO
2
)
Sensor, CO
2
: optical NDIR sensor (non-dispersive infra-red technology)
with automatic and manual calibration
Measuring range, CO
2
: 0...5000 ppm
Measuring accuracy, CO
2
: typically ± 30 ppm ± 3 % of measured value
Temperature dependence, CO
2
: ± 5 ppm ⁄ °C or ± 0.5 % of measured value ⁄ °C
(whichever is higher)
Pressure dependence: ± 0.13 % ⁄ mm Hg
Long-term stability: < 2 % in 15 years
Gas exchange: by diffusion
Bus protocol: Modbus (RTU-Mode), address range 0...
247 selectable
Signal filtering: 4 s / 32 s
Ambient temperature: 0...+50 °C
Warm up time: approx. 1 hour
Response time: < 2 minutes
Electrical connection: 0.2 - 1.5 mm
2
, via push-in terminal
Enclosure:
plastic, material ABS, colour pure white (similar to RAL 9010)
Dimensions: 98 x 98 x 33 mm (Baldur 2)
Installation: wall mounting or on in-wall flush box, Ø 55 mm, base with 4 holes, for attachment to vertically
or horizontally installed in-wall flush boxes for rear cable entry, with predetermined breaking
point for cable entry from top ⁄ bottom in case of plain on-wall installation
Protection class: III (according to EN 60 730)
Protection type: IP 30 (according to EN 60 529)
Standards: CE conformity, electromagnetic compatibility
according to EN 61 326, EMC Directive 2014 ⁄ 30 ⁄ EU,
Low Voltage Directive 2014 ⁄ 35 ⁄ EU
Optional:
display with illumination, two line, cutout approx. 36 x 15 mm (W x H),
for displaying actual humidity, actual temperature, air quality and the actual CO
2
content (cyclic)
or a selectable parameter (static)
or an individually programmable display value
ACCESSORIES see table