14
G
AERASGARD
®
RFTM - LQ - PS - CO2 - Modbus
Rev. 2021 - V30
Multifunctional indoor climate sensor
AERASGARD
®
RFTM - LQ
- PS
- CO2 Modbus
(maximum expansion level) with Modbus connection, in an elegant
plastic housing with snap-on lid, base with 4-hole attachment, optionally with ⁄ without display, type variant
RFTM - CO2 Modbus
optionally with ⁄
without setpoint potentiometer.
The room sensor is used to detect the measurands air humidity (0...100 % r.H.), temperature (0...+50°C), air quality (0…100 % VOC), fine dust (PM)
(0...1000 µg/m) and CO2
content (0...5000 ppm) as well as a room control unit (% setpoint).
Use just one device to monitor and control the entire indoor climate effectively. This enables energy-saving room ventilation on an as-needed basis,
thereby reducing operating costs and improving well-being. It is used in offices, hotels, convention centres, apartments, shops, etc.
A long-term stable,
digital humidity and temperature sensor
guarantees exact measurement results. The air quality is determined based on a
(VOC)
mixed gas sensor
. The CO2 content of the air is measured using an optical
NDIR sensor
(non-dispersive infra-red technology).
An optical
particulate sensor
precisely detects
fine dust (PM)
of the size category 0.3 to 10 micrometers. The sensor is factory-calibrated; an
environmental precision adjustment by an expert is possible. One sensor for every 30 m² of space is recommended.
Modbus sensor
with galvanically separated RS485 Modbus interface, selectable bus termination resistance, DIP switches for setting the bus parameters
and bus address in the currentless state, LEDs for telegram status display and two-line display (illuminated; with customised programming in the
7-segment and dot-matrix range).
TECHNICAL DATA
Power supply:
24 V AC ⁄ DC (± 10 %)
Power consumption:
typically < 4.4 W ⁄ 24 V DC; < 6.4 VA ⁄ 24 V AC; peak current 200 mA
Data points:
temperature [°C], relative humidity [% r.H.], air quality (VOC) [%,ppb],
fine dust (PM) [µg/m
3
], carbon dioxide (CO2) [ppm], setpoint potentiometer [%]
HUMIDITY & TEMPERATURE
Sensor (RH / °C):
digital humidity sensor with integrated temperature sensor,
low hysteresis, high long-term stability
Deviation (RH):
typically
± 2.0 %
(20...80 % r. H.) at +25 °C, otherwise ± 3.0 %
Deviation (°C):
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; with reference to calibration gas;
multi-range switching VOC sensitivity low, medium, high
Measuring accuracy (VOC):
typically ± 20 % final value (with reference to the calibration gas)
Service life (VOC):
> 60 months (under normal load conditions)
FINE DUST
(PM)
Sensor (PM):
optical
fine-dust sensor
(
PM
= particulate matter),
particulate sensor with laser- and soiling-resistant technology
Measuring range (PM):
0...1000 µg/m
3
Particle size (PM):
PM
2.5
(0.3...2.5 µm);
PM
10
(0.3...10 µm)
Measuring accuracy (PM):
typically ± 10 µg/m
3
(± 10 % of measured value) at PM 2.5
typically ± 25 µg/m
3
(± 25 % of measured value) at PM 10
Long-term stability (PM):
± 1.25 µg/m
3
(± 1.25 % of measured value/year)
Service life (PM):
> 10 years
CARBON DIOXIDE (CO2)
Sensor (CO2):
optical
NDIR sensor
(non-dispersive infra-red technology)
with manual calibration (via zero button)
with automatic calibration (can be deactivated via Modbus)
Measuring range (CO2):
0…5000 ppm
Measuring accuracy (CO2):
typically ± 30 ppm (± 3 % of measured value)
Temperature
± 5 ppm ⁄ °C or ± 0.5 % of measured value ⁄ °C
dependence (CO2):
(whichever is greater)
Pressure dependence (CO2): ± 0.13 % ⁄ mm Hg
Long-term stability (CO2):
< 2 % in 15 years
Gas exchange (CO2):
Diffusion
Ambient temperature:
0...+ 50 °C
Permitted humidity:
0…95 % r. H. (non-precipitating air)
Warm up time:
approx. 1 hour
Response time:
< 2 minutes
Electrical connection:
0.2 - 1.5 mm
2
, via push-in terminal
Housing:
plastic, material ABS, colour pure white (similar to RAL 9010)
Dimensions:
98 x 98 x 33 mm (Baldur 2)
Mounting:
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 top/bottom cable entry for surface-mounted 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,
2-line, cutout approx. 36 x 15 mm (W x H),
to display actual humidity, actual temperature, air quality, of the fine-dust and CO2 content (cyclic)
or a selectable parameter (static) or an individually programmable display value
