S+S Regeltechnik HYGRASGARD RFTF-Modbus Notice D'instruction page 14

G
®
HYGRASGARD
The calibratable room sensor HYGRASGARD
measures the relative humidity and temperature of the room air. These measurands are used to internally calculate various parameters. The Modbus can be
used to retrieve the following parameters: 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]. As operating element you can chooce between a potentiometer, a 5-pole rotary
switch or a presence button. For the temperature / relative humidity / absolute humidity / dew point / mixture ratio / enthalpy or setpoint output devices with
LCD display are optionally available for displaying readings. Operating status can be displayed via a maximum of 5 multi-coloured LEDs. These displays
(LCDs), as well as the retrieval of measurement and control values, are controlled via the Modbus interface.
TECHNICAL DATA
Power supply: 24 V AC (± 20 %) and
15...36 V DC
Power consumption: < 1 VA ⁄ 24 V DC,
< 2.2 VA ⁄ 24 V AC
Sensor: Digital humidity sensor
with integrated temperature sensor,
low hysteresis, high long-term stability
Data points: Temperature, relative humidity, absolute humidity,
dew point, mixture ratio, enthalpy
and setpoint potentiometer,
rotary switch and presence button
Measuring range: 0...100 % r.H. (humidity)
0...+ 50 °C (temperature)
Deviation, humidity: typically ± 2.0 % (20...80 % r. H.) at +25 °C, otherwise ± 3.0 %
Temperature deviation: typically ± 0.2 K at +25 °C
Zero point offset: ± 10 % r.H. (humidity)
± 10 °C (temperature)
adjustable using potentiometer
Ambient temperature: Storage –35...+85 °C;
Operation 0...+50 °C
Medium: clean air and
other non-aggressive, non-combustible gases
Bus protocol: Modbus (RTU mode),
address range 0...247 selectable,
LEDs colour-programmable
Signal filtering: 4 s / 32 s
Housing: plastic, material ABS,
colour pure white (similar to RAL 9010)
Dimensions: 98 x 98 x 33 mm (Baldur 2)
Installation: 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 cable entry
from top ⁄ bottom in case of plain on-wall installation
Long-term stability: ± 1 % ⁄ year
Permissible air humidity: < 95 % r. H., non-precipitating air
Protection class: III (according to EN 60 730)
Protection type: IP 30 (according to EN 60 529)
Standards: CE conformity
according to EMC Directive 2014 ⁄ 30 ⁄ EU,
according to EN 61 326
Features: Display with illumination, two-line, programmable,
cutout approx. 36 x 15 mm (W x H),
to display actual humidity and temperature
or a selectable parameter
or an individually programmable display value
ACCESSORIES see table
RFTF - Modbus
® RFTF - Modbus with Modbus connection, with/without optional display in an elegant housing (Baldur 2)
1 2
RS485 Modbus A
RS485 Modbus B
Shielding
Presence
button
Plug for
display Turn switch
3 ON DIP A
4
1 2 3 4 5 6 7 8
5
r.H.
ON DIP B
1 2 3 4 5 6
Potentio-
Zero point calibration
meter
The sensors are preset and calibrated at the factory.
Adjustment is possible using the two offset potentiometers.
Range of adjustment: approx. ± 10 °C or ± 10 % r.H.
14
Schematic diagram
Plug for
1 2
display
RS485 Modbus A 3
RS485 Modbus B 4
Shielding 5
Presence
button
DIP A: Bus address
DIP B: Bus parameters
(Baud rate, parity ...)
Telegram indicator
Reception (LED green)
Error (LED red)
LED (internal status)
Offset correction
temperature: ± 10°C
°C
Offset correction
humidity: ± 10% r.H.
r.H.
Plug for display
°C
contact is
on the right side
Display
standard
Rev. 2021 - V24
RFTF- Modbus
Turn switch
°C
ON DIP A
1 2 3 4 5 6 7 8
r.H.
r.H. °C
ON DIP B
1 2 3 4 5 6
Potentio-
meter
RFTF - Modbus
Display