S+S Regeltechnik Aerasgard RC02-Modbus Operating Instructions, Mounting & Installation page 14

G
®
HYGRASGARD
The maintenance-free microprocessor-controlled room sensor with Modbus connection with/without optional display, in elegant plastic housing, with snap-on
lid, base with 4-hole attachment is an all-in-one device used for detecting all relevant measured values, such as humidity, temperature, CO
and air quality (VOC), thus enabling effective monitoring and control of the entire room climate. It measures CO
one of three selectable sensitivity levels LOW / MEDIUM / HIGH, temperatures in the range from 0...+50°C as well as relative air humidity of 0...100 % r.H.
Relative humidity (% r.H.) is the quotient of water vapour partial pressure divided by the saturation vapour pressure at the respective gas temperature. A
digital, long-term stable sensor as a measuring element for relative humidity and temperature guarantees exact measurement results. The air quality is
determined based on a (VOC) mixed gas sensor. The CO
TECHNICAL DATA
Power supply:
Power consumption:
Data points:
HUMIDIT Y
Sensors:
Operating range, humidity:
Deviation humidity:
TEMPERATURE
Operating range, temperature: 0...+50 °C
Deviation, temperature:
AIR QUALIT Y (VOC)
VOC sensor:
VOC measuring range:
VOC measuring accuracy:
Service life:
CARBON DIOXIDE (CO )
2
CO sensor:
2
CO measuring range:
2
CO measuring accuracy:
2
CO temperature dependence: ± 5 ppm ⁄ °C or ± 0.5 % of measured value ⁄ °C
2
Pressure dependence:
Long-term stability:
Gas exchange:
Bus parameters:
Bus interface:
Bus protocol:
Baud rate:
Status indicator:
Signal filtering:
Ambient temperature:
Warm up time:
Response time:
Electrical connection:
Enclosure:
Dimensions:
Mounting:
Protection class:
Protection type:
Standards:
Optional:
RFTM - LQ - CO - Modbus
2
content of the air is measured using an optical NDIR sensor (non-dispersive infra-red technology).
2
24 V AC ⁄ DC (± 10 %)
< 4.4 W ⁄ 24 V DC typical; < 6.4 VA ⁄ 24 V AC typical;
peak current 200 mA
temperature, relative humidity,
air quality (VOC), carbon dioxide (CO
digital humidity sensor with integrated temperature sensor,
low hysteresis, high long-term stability
0...95 % r. H. (non-precipitating air)
± 3 % r.H. (20...80 %) at +20 °C, otherwise ± 5 % r.H.
± 0.2 K at +25 °C
VOC sensor (metal oxide) with automatic calibration
0...100 % air quality; with reference to calibration gas;
multi-range switching VOC sensitivity low, medium, high
± 20 % final value (with reference to the calibration gas)
> 60 months (under normal load conditions)
optical NDIR sensor
with automatic and manual calibration
0...5000 ppm
1 2 3 4
± 30 ppm ± 3 % of measured value
shield
(whichever is higher)
± 0.13 % ⁄ mm Hg
< 2 % in 15 years
by diffusion
In the absence of current delivery (under currentless conditions)
can be configured and addressed via DIP switch!
RS 485, galvanically isolated, bus termination can be
shield
activated via DIP switch. Up to 32 devices possible
1 2 3 4
in one segment. In case of a greater number of devices,
RS 485 transceivers must be used.
Modbus (RTU-Mode), address range 0...247 selectable
9600, 19200, 38400 Baud
Green LED = Telegram valid / red LED = Telegram error
4 s / 32 s
0...50 °C
approx. 1 hour
< 2 minutes
2
0.2 - 1.5 mm , via push-in terminal
plastic, material ABS,
colour pure white (similar to RAL 9010)
98 x 98 x 33 mm (Baldur 2)
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
top/bottom cable entry for surface-mounted installation
III (according to EN 60 730)
IP 30 (according to EN 60 529)
CE-conformity, electromagnetic compatibility
according to EN 61 326, EMC directive 2014 ⁄ 30 ⁄ EU,
low voltage directive 2014 ⁄ 35 ⁄ EU
two-line display with illumination, cutout approx. 36 x 15 mm
(W x H), to display the actual humidity, actual temperature,
air quality and / or the actual CO
)
2
Plug for
display
Sensor
CO
2
ON DIP B ON DIP A
1 2 3 4 5 6 1 2 3 4 5 6 7 8
mode address
°C r.H. VOC CO ² CO ²
offset
content
2
14
in the range from 0...5000 ppm, VOC in
2
Schematic diagram
Sensor
1 2 3 4
CO
shield
ON DIP B
1 2 3 4 5 6
mode
shield
1 2 3 4
°C
DIP A: Bus address
Sensor
DIP B: Bus parameters
VOC
(Baud rate, parity ...)
Telegram indicator
Reception (LED green)
Error (LED red)
Shielding
Offset correction
LED (internal status)
Reset button
VOC
zero
Zero point calibration
The sensors are pre-set and calibrated at the factory.
Each measuring channel has a separate offset
potentiometer for subsequent adjustment of the
measurement. The adjusting range is ± 10 % of the
measuring range.
Rev. 2017 - V21 GB
concentration
2
Sensor
Plug for
VOC
display
2
ON DIP A
1 2 3 4 5 6 7 8
address
r.H. VOC CO ² CO ² VOC
offset zero