Vector Controls B2235767 User Manual
SDC-C1
Item name
Item code
Description/Option
SDC-C1-08-1
40-30 0109
CO2 transmitter for air ducts, 80 mm probe, incl. cable gland AMC-1
SDC-C1-16-1
40-30 0152
CO2 transmitter for air ducts, 160 mm probe, incl. cable gland AMC-1
SDC-C1-16-OP
40-30 0094
CO2 transmitter for air ducts, 160 mm probe, incl. display
Item name
Item code
Description/Option
OPU-S
40-50 0006
External display module
AMC-2
40-500074
Conduit connector: NPT thread
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 (-OP or OPU-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 seconds and
generates the output signal.
The output signal range and type may be customized by jumpers and if required by a programming tool. Standard signal
ranges are 0…10 VDC, 2…10 VDC, 4…20 mA and 0…20 mA. These ranges can be set by jumpers. Other ranges can be set by
using the internal or external display and programming module. (-OP or OPU-S)
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 be deactivated through the external operation
terminal. The Sensor can be calibrated by the client and does not need to be sent in for calibration. See last page for details.
Minimum and maximum values
Using a display and programming accessory, the user has the option to read out and reset minimum and maximum values.
The minimum and maximum values may as well be used as output signals. The minimum and maximum values are saved into
the EEPROM and are available after a power interruption.
Ordering
Accessories
Doc: 70-07-0399, V1.2, 20170131, Subject to alteration, ©Vector Controls GmbH, Switzerland, www.vectorcontrols.com Page 1
SDC-C1
Power supply
Operating voltage
24 VAC 50/60 Hz ± 10%, 24 VDC ± 10%
SELV to HD 384, Class II transformer, 48 VA max
Power consumption
Max 2 VA
Connection
Terminal connectors
For wire 0.34…2.5 mm2 (AWG 22…13)
CO2 measurement
Sensing method
Non-dispersive infrared (NDIR) waveguide technology
with ABC automaticbackground calibration algorithm
Sampling method
Diffusion
Response time (T
1/e
)
40 s diffusion time
Measurement range
0 - 5000 ppm
vol.
Repeatability
± 20 ppm ± 1 % of measured value
Accuracy
± 30 ppm ± 3 % of measured value
Pressure dependence
+ 1.6% reading per kPa deviation from normal
pressure, 100 kPa
Signal outputs
Analog outputs
Output signal
Resolution
Maximum load
DC 0…10 V or 0…20 mA
10 Bit, 9.7 mV, 0.019.5 mA
Voltage: ≥1kΩ, Current: ≤250Ω
Environment
Operation
Climatic conditions
Temperature
Humidity
To IEC 721-3-3
class 3K5
0…50 °C (32…122 °F)
<95% RH non-condensing
Transport and storage
Climatic conditions
Temperature
Humidity
Mechanical conditions
To IEC 721-3-2 and IEC 721-3-1
class 3K3 and class 1K3
-30…70 °C (-22…158 °F)
<95% RH non-condensing
class 2M2
Standards
conformity
EMC Directive
2004/108/EC
EN 61 000-6-1/ EN 61 000-6-3
Degree of protection
IP30 to EN 60 529
Safety class
III (IEC 60536)
Housing materials
Housing materials
PC+ABS (UL94 class V-0)
General
Dimensions (H x W x D): Transmitter:
Probe:
68 x 91 x 47 mm (2.7” x 3.7” x 1.9”)
14 x 157 mm ( 0.55 x 6.2”)
Weight (incl. package)
290 g (10.2 oz.)
14 157
(0.55 x 6.2)
47 (1.9)
91 (3.6)
68(2.7)
Technical Specification
Safety advice. This device may only be installed and configured by a skilled electrician. Where a device failure endangers
human life and/or property, it is the responsibility of the client, installer and designer to add additional safety devices to
prevent or detect a system failure caused by such a device failure.
Dimensions mm (inch)
Doc: 70-07-0399, V1.2, 20170131, Subject to alteration, ©Vector Controls GmbH, Switzerland, www.vectorcontrols.com Page 2
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