Technical Data - S+S Regeltechnik AERASGARD AC02-Modbus Operating Instructions, Mounting & Installation

G
®
HYGRASGARD
The maintenance-free, microprocessor-controlled on-wall or duct sensor with Modbus connection, with ⁄ without optional display, is used to monitor all
measurands of relevance to the climate inside a room. These are the measurands air humidity, temperature, CO2 concentration as well as air quality (VOC).
By using a single device to monitor all four measurands, it is possible to effectively monitor and regulate the entire room climate. It measures CO2 in the
range of 0...5000 ppm, the air quality (0...100 % VOC), temperatures in the range of –35...+80 °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 Modbus
can be used to retrieve the following parameters: Temperature [°C], relative humidity [% r.H.], air quality (VOC) [%], carbon dioxide (CO2) [ppm] and atmos-
pheric pressure [hPa]. The CO2 content of the air is measured using an optical NDIR sensor (non-dispersive infra-red technology). The detection range of
the sensors is calibrated for standard applications such as monitoring residential rooms and conference rooms. Room ventilation on an as-needed basis,
improved well-being and customer benefit, increased comfort as well as reduced operating costs through energy conservation are just some of the benefits
®
of employing the AERASGARD
ments, but from our perspective, above all, for a combination of both measurands. The crucial factor in this respect is that both of these measurands are
not convertible into each other and derivations to or from one another cannot be made. An NDIR CO2 measuring instrument measures selectively and cannot
detect any VOC; a VOC mixed gas sensor cannot recognize CO2 molecules. One sensor for every 30 m² of space is recommended.

TECHNICAL DATA

Voltage supply:
Power consumption:
Data points:
HUMIDIT Y
Sensors:
Sensor protection:
Measuring range, humidity:
Operating range, humidity:
Deviation of humidity:
TEMPERATURE
Measuring range, temperature: –35...+80 °C
Operating range, temperature:
Deviation, temperature:
AIR QUALIT Y (VOC)
Sensor, VOC:
Measuring range, VOC:
Measuring accuracy, VOC:
Service life:
CARBON DIOXIDE (CO2)
Sensor, CO2:
Measuring range, CO2:
Measuring accuracy, CO2:
Temperature dependence, CO2: ± 5 ppm ⁄ °C or ± 0.5 % of measured value ⁄ °C (whichever is higher)
Pressure dependence:
Long-term stability:
Gas exchange:
Bus protocol:
Signal filtering:
Ambient temperature:
Response time:
Electrical connection:
Housing:
Housing dimensions:
Cable connection:
Protective tube:
Process connection:
Protection class:
Protection type:
Standards:
Optional:
AFTM- ⁄ KFTM - LQ - CO2 - Modbus
CO2 sensor. The explanations above demonstrate that there are applications for CO2 measurements, for VOC measure-
24 V AC ⁄ DC (± 10 %)
< 4.8 W ⁄ 24 V DC typical; < 6.8 VA ⁄ 24 V AC typical; peak current 200 mA
Temperature [°C], relative humidity [% r.H.], air quality (VOC) [%], carbon dioxide (CO2) [ppm], atmospheric pressure [hPa]
digital humidity sensor with integrated temperature sensor, low hysteresis, high long-term stability
plastic sinter filter, Ø 16 mm, L = 35 mm, exchangeable (optional metal sinter filter, Ø 16 mm, L = 32 mm)
0...100 % r. H.
0...95 % r. H. (without dew formation)
typically ± 2.0 % (20...80 % r. H.) at +25 °C, otherwise ± 3.0 %
–10...+60 °C
typically ± 0.2 K at 25 °C
VOC sensor (metal oxide) with automatic calibration (VOC = volatile organic compounds)
0...100 % air quality; referred to calibrating gas;
multi-range switching VOC sensitivities (low/medium/high)
± 20 % of final value (referred to calibrating gas)
> 60 months (under normal load conditions)
optical NDIR sensor (non-dispersive infra-red technology) including atmospheric pressure compensation (up to 1100 mbar)
with manual calibration (via zero button)
with automatic calibration (can be deactivated via Modbus)
0...5000 ppm
typically ± 30 ppm ± 3 % of measured value
± 0.13 % ⁄ mm Hg
< 2 % in 15 years
by diffusion
Modbus (RTU mode), address range 0...247 selectable
4 s / 32 s
–10...+60 °C
< 2 minutes, minimal flow velocity 0.3 m/s (air)
0.2 - 1.5 mm 2 , ia push-in terminal
plastic, UV-resistant, material polyamide, 30 % glass-globe reinforced, with quick-locking screws (slotted ⁄
Phillips head combination), colour traffic white (similar to RAL 9016),,housing cover for display is transparent!
126 x 90 x 50 mm (Tyr 2)
cable gland, plastic (M 16 x 1.5; with strain relief, exchangeable, inner diameter 10.4 mm) or
M12 connector according to DIN EN 61076-2-101 (optional on request)
KCO2 / KLQ - CO2 / KFTM - CO2 / KFTM - LQ - CO2 - Modbus (patent no. DE 10 2014 010 719.1):
TM , material polyamide (PA6), with torsion protection, Ø 20 mm, v
PLEUROFORM
without filter: NL = 202.5 mm / with plastic filter: NL = 235 mm (optional with metal filter: NL = 227 mm)
AFTM - CO2 / AFTM - LQ - CO2 - Modbus: stainless steel V2A (1.4301), Ø 16 mm,
with plastic sinter filter: NL = 55 mm (optional with metal sinter filter: NL = 47 mm)
KFTM - LQ - CO2 - Modbus: via mounting flange made of plastic (included in scope of delivery)
AFTM - LQ - CO2 - Modbus: by screws
III (according to EN 60 730)
KCO2 / KLQ - CO2 / KFTM - CO2 / KFTM - LQ - CO2 - Modbus: IP 65 (according to EN 60 529)
housing in the built-in state (permeable PLEUROFORM: IP 30)
AFTM - CO2 / AFTM - LQ - CO2 - Modbus: IP 65 (according to EN 60 529)
CE conformity, electromagnetic compatibility according to EN 61 326, EMC Directive 2014 ⁄ 30 ⁄ EU
Display with illumination, three-line, cutout approx. 70 x 40 mm (W x H), for displaying actual humidity,
actual temperature, air quality and the actual CO2 content (cyclic) or a selectable parameter (static)
or an individually programmable display value (The Modbus interface allows the display to be individually
configured in the 7-segment area and in the dot-matrix area.)
14
Rev. 2021 - V25
= 30 m/s (air)
max