Technical Data - S+S Regeltechnik Hygrasgard Rftf-Wmodbus Bedienungs- Und Montageanleitung

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HYGRASGARD
The calibratable room sensor HYGRASGARD
base with 4-hole attachment, measures air humidity (0...100 % RH) and temperature (– 35...+80 °C / – 31...+176 °F). These measured values are
used to internally calculate the following parameters that can be retrieved via Modbus: absolute humidity, mixture ratio, dew point temperature,
enthalpy (ignoring atmospheric air pressure). International system of units SI (default) can be changed to imperial (via Modbus). The W-Modbus
(Wireless) replaces the RTU cable, the BMS connection is wireless and is established via a W-Modbus gateway.
A long-term stable, digital humidity and temperature sensor guarantees exact measurement results. The sensor is factory-calibrated; an
environmental precision adjustment by an expert is possible. Modbus sensor with galvanically separated RS485 Modbus interface, selectable bus
termination resistance, DIP switches for setting the bus parameters and bus address in a currentless state, internal LEDs for telegram status.

TECHNICAL DATA

Power supply:
Power consumption:
Sensor:
System of units:
Data points:
Measuring range:
Deviation, humidity:
Deviation, temperature:
Zero point offset:
Ambient temperature:
Medium:
Communication:
Radio:
Range:
Bus protocol:
Signal filtering:
Electrical connection:
Housing:
Housing dimension:
Installation:
Long-term stability:
Permissible air humidity:
Protection class:
Protection type:
Standards:
ACCESSORIES
Switchable system of units
Measurements / Data points
Temperature
Relative humidity
Dew point
Absolute humidity
Mixing ratio
Enthalpy
®
RFTF - wModbus
® RFTF - wModbus with W-Modbus (Wireless), in an elegant plastic housing (Baldur 2) with snap-on lid,
24 V AC (± 20 %) and 15...36 V DC
< 1.2 W ⁄ 24 V DC; < 2.2 VA ⁄ 24 V AC
digital humidity sensor
with integrated temperature sensor,
low hysteresis, high long-term stability
SI (default) or Imperial (switchable via Modbus)
temperature [°C] [°F], relative humidity [% RH],
absolute humidity [g/m 3 ] [gr/ft
mixture ratio [g/kg] [gr/lb], enthalpy [kJ/kg] [Btu/lb]
0...100 % RH (humidity); – 35...+80 °C / – 31...+176 °F (temperature)
typically ± 2.0 % (20...80 % RH) at +25 °C / +77 °F, otherwise ± 3.0 %
typically ± 0.4 K at +25 °C / ± 0.8 °F at +77 °F
± 10 % RH (humidity); ± 5 °C ⁄ ± 9 °F (temperature)
adjustable using potentiometer
storage –35...+85 °C / –31...+176 °F; operation 0...+50 °C / +32...+122 °F
clean air and non-aggressive, non-combustible gases
W-Modbus (Wireless Modbus, AES-128 encrypted)
Frequency 2.4 GHz ISM, Transmission power 100 mW
max. 500 m ⁄ 1640 ft (open field) / approx. 50 - 70 m / 164 - 230 ft (inside buildings)
Modbus (RTU mode), address range 0...247 selectable
4 s / 32 s
2
0.2 - 1.5 mm / 24 - 16 AWG, via push-in terminals
plastic, material ABS,
colour pure white (similar to RAL 9010)
98 x 98 x 33 mm / 3.86 x 3.86 x 1.30 in (Baldur 2)
wall mounting or on in-wall flush box, Ø 55 mm / 2.17 in,
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
± 1 % per year
< 95 % RH, non-precipitating air
III (according to EN 60 730)
IP 30 (according to EN 60 529)
CE conformity according to Radio Directive 2014 ⁄ 53 ⁄ EU
see table
SI (default) → Imperial
[°C] → [°F]
[% RH] → [% RH]
[°C] → [°F]
[g/m³] → [gr/ft³]
[g/kg] → [gr/lb]
[kJ / kg] → [Btu/lb]
3 ], dew point [°C] [°F],
Measuring ranges
13
Rev. Data - V26
SI (default) →
–35...+80 °C → –31...+176 °F
0...100 % RH → 0...100 % RH
Imperial