SDC-C1
D
UCT
CO2
T
RANSMITTER
Doc: 70-00-0399A, V2.9, 20220405
© Vector Controls GmbH, Switzerland
Page 1-8
Subject to change without notice
www.vectorcontrols.com
SDC-C1 Duct CO2-transmitter
Features
•
CO2 measurement for air ducts
•
Minimum and maximum value memory
•
0…10V, 0…20mA or 2…10V, 4…20mA measuring signals
selectable with jumpers
•
Optional alternative signal ranges programmable
•
May be used as simple P-controller
•
Selectable averaging signal
•
Optional internal or external display (OPC-S or OPA-S)
•
Status LED
Applications
•
Demand based ventilation for homes and offices based on
measurement of the CO2 concentration
•
Preset standard measuring range 0...2000 ppm, max
possible range 0...5000 ppm
•
Recording of minimum and maximum limits for critical environments
•
Direct control of extraction fan
CO2 transmitter
The CO2 concentration is measured through non-dispersive infrared (NDIR) waveguide technology with ABC automatic
background calibration algorithm. The applied measuring technology guarantees excellent reliability and long-term
stability. The microprocessor samples the CO2 once per second. It calculates an averaging signal over a preset number of
samples and generates the output signal.
The output signal range and type may be customized by jumpers and if required by a programming module. Standard
signal ranges are 0-10 VDC, 2-10 VDC, 4-20 mA and 0-20 mA. Other ranges can be defined by using the external display
and programming module (OPA-S).
For OPA-S, OPC-S
usage see section “
” on page
Automatic baseline calibration (ABC)
The ABC background calibration constantly supervises the measured CO2 concentrations. The calibration function expects
the CO2 values sink to 400 ppm when the room is not occupied. Over a period of several days the controller tries to reach
this value step by step through recalibration of 30ppm per day max. In order to reach the given accuracy, it is required
that the sensor is for at least 3 weeks in operation.
NOTE: The ABC calibration works only in those applications where the CO2 concentration sinks regularly to fresh air
levels of 400 ppm. For special applications such as green houses, animal farms, etc. the ABC calibration should be
de-activated and the sensor should be manually calibrated. The automatic calibration can deactivate through the
external operation terminal. See chapter parameter configuration for details. The Sensor can be calibrated by the
client and does not need to be sent in for calibration. For manual calibration see section
on page 7.
Minimum and maximum values
Using a display & programming module OPA-S or the optional built-in display and operation terminal OPC-S, the user has
the option to read out and reset minimum and maximum CO2 values. The minimum and maximum values may as well be
used as output signals. The minimum and maximum values are automatically saved to the device and are available after a
power interruption.
For OPA-S, OPC-S
usage see section “
Displaying minimum and maximum values
Safety
DANGER! Safety advice
This device is for use as a CO2 concentration indicator and CO2 transmitter for comfort applications. It is not a
safety device. Where a device failure could endanger human life and property, it is the responsibility of the client,
installer and system designer to add additional safety devices to prevent such a device failure. Ignoring
specifications and local regulations may cause equipment damage and endangers life and property. Tampering
with the device and misapplication will void warranty.
Types and Ordering
Product Name
Product Nr.
Description/Option
CO2 Sensor
SDC-C1-16-1
40-300152
CO2 transmitter for air ducts, 160 mm probe, incl. cable gland AMC-1
Accessories
OPC-S
40-500029
Built-in display and operation terminal.
OPA-S
40-500006
External display and operation terminal.
Note: For the correct display of values, V1.7 and later is required.
AMC-2
40-500074
Conduit connector: NPT thread
