10
G
HYGRASGARD
®
FSFTM - Modbus
Rev. 2021 - V12
The room sensor and measuring transducer
HYGRASGARD
®
FSFTM - Modbus
in the in-wall housing, optionally with potentiometer, is used to
measure the relative humidity and temperature of the air, and for setpoint adjustment. The following parameters are calculated internally from the
measured values: relative humidity [% r. H.], absolute humidity [g ⁄ m³], mixture ratio [g ⁄ kg], dew point temperature [°C], enthalpy [kJ ⁄ kg] (ignoring
atmospheric air pressure) and room temperature [°C]. The parameters are queried via the Modbus interface.
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:
< 1.1 W ⁄ 24 V DC ; < 2.2 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:
temperature [°C], relative humidity [% r. H.], absolute humidity [g ⁄ m³], dew point [°C],
mixing ratio [g ⁄ kg], enthalpy [kJ ⁄ kg] and setpoint potentiometer
(no setpoint adjustment possible with Busch-Jaeger)
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)
Summary of Contents for FSFTM-Modbus
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