10
G
AERASGARD
®
FSFTM - CO2 - Modbus
Rev. 2021 - V12
The room sensor and measuring transducer
AERASGARD
®
FSFTM - CO2 - Modbus
in the in-wall housing, optionally with potentiometer, is used to
measure the CO2 content, relative humidity and temperature of the air, and for setpoint adjustment. The measured values are queried via the
Modbus interface. The CO2 content of the air is measured using an optical NDIR sensor (non-dispersive infra-red technology). A digital, long-term
stable sensor is used for humidity and temperature measurement. Relative humidity [% r. H.] is the quotient of water vapour partial pressure divided
by the saturation vapour pressure at the respective gas temperature. The in-wall sensor is mounted in high-quality panel switch programmes,
ideally of the brands Gira, Berker, Merten, Jung, Siemens or Busch-Jaeger (using in-wall adapters, no setpoint adjustment possible) either individually
or in combination with light switches, socket outlets, etc. It is used in non-aggressive, dust-free environments, in refrigeration, air conditioning and
clean room technology, and in interior rooms, such as living rooms, offices, hotels, etc.
TECHNICAL DATA
Power supply:
24 V AC ⁄ DC (± 10 %)
Power consumption:
< 4.4 W ⁄ 24 V DC ; < 6.4 VA ⁄ 24 V AC
Bus parameters:
In the absence of current delivery
(under currentless conditions)
can be
configured and addressed via DIP switch!
Bus interface:
RS 485,
galvanically isolated,
bus termination can be activated via DIP switch.
Up to 32 devices possible in one segment.
In case of a greater number of devices, RS 485 transceivers must be used.
Bus protocol:
Modbus (RTU-Mode), address range 0...
247
selectable
Baud rate:
9600, 19200, 38400 Baud
Signal filtering:
4 s / 32 s
Data points:
relative humidity [% r.H.], temperature [°C], CO2 content of the air [ppm]
as well as setpoint potentiometer (no setpoint adjustment possible with Busch-Jaeger)
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)
Long-term stability:
< 2 % in 15 years
Measuring range, CO2:
0...5000 ppm
Measuring accuracy, CO2:
typically ± 30 ppm ± 3 % of measured value
Temperature dependence, CO2:
± 5 ppm ⁄ °C or ± 0.5 % of measured value ⁄ °C (whichever is higher)
Pressure dependence:
± 0.13 % ⁄ mm Hg
Gas exchange:
by diffusion
Warm up time:
approx. 1 hour
Response time:
< 2 minutes
HUMIDITY
Sensor:
digital humidity sensor with integrated temperature sensor,
low hysteresis, high long-term stability
Long-term stability:
± 1 % per year
Measuring range, humidity::
0...100 % r. H.
Operating range, humidity:
0...95 % r. H. (non-precipitating air)
Deviation, humidity:
typically ± 3.0 % (20...80 % r. H.) at +25 °C, otherwise ± 5.0 %
TEMPERATURE
Measuring range:
0...+50 °C
Deviation, temperature:
typically ± 0.8 K at +25 °C
Mounting:
in-wall flush box Ø 55 mm
Electrical connection:
0.14 - 1.5 mm², via screw terminals
Ambient temperature:
Storage –35...+85 °C;
Operation 0...+50 °C
Permitted humidity:
max. 90 % r.H., non-precipitating air
Medium:
clean air and other non-aggressive, non-combustible gases
Protection class:
III (according to EN 60 730)
Protection type:
IP 20 (according to 60 529)
Standards:
CE-conformity, electromagnetic compatibility according to EN 61 326, EMC Directive 2014 ⁄ 30 ⁄ EU
SWITCH PROGRAMME
Manufacturer:
GIRA System 55
(other switch programmes, manufacturers, colours as well as prices available upon request)
Housing:
plastic, the standard colour is pure glossy white (similar to RAL 9010) (other colours are available upon request
with colour variants depending on the respective light switch programme)
Type ⁄ WG02
Measuring Range
CO2
Humidity
Temperature
Control
element
Output
Item No.
FSFTM-CO2-Modbus
0...5000 ppm
0...100 % r. H.
0…+50 °C
–
Modbus
1501-9226-6001-162
FSFTM-CO2-Modbus P
0...5000 ppm
0...100 % r. H.
0…+50 °C
Potentiometer
Modbus
1501-9226-6501-282
Data points:
relative humidity [% r. H.], temperature [°C], CO2 content of the air [ppm] and setpoint potentiometer
