Vector Controls B2235768 User Manual
SRC-C1
Item name
Item code
Description/option
SRC-C1
40-30 0062
CO2 transmitter
Item name
Item code
Description/option
OPA-S
40-50 0006
External display module.
For the correct display of values V1.4 and later is required
SRC-C1 Indoor CO2 Transmitter
Features
Indoor CO2 measurement
Indication with three color led
Minimum and maximum value memory
0…10 V, 0…20 mA or 2…10 V, 4…20 mA measuring signals
selectable with jumpers
Optional alternative signal ranges programmable
May be used as simple P-controller
Selectable averaging signal
Optional external display (OPA-S)
Status LED
Applications
Indoor CO2 measurement
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 external display and programming module. (OPA-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 deactivated and the sensor should be manually calibrated. The automatic calibration can 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 & 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.
Indication of air quality indication:
A three color LED is used to indicate air quality: Green light for low CO2 concentration, orange light for medium and
red light for high concentration. The levels for low-medium-high may be programmed.
Default settings are 0 ppm< low < 800 ppm< medium < 1500 ppm < high.
Ordering
Accessories
Doc: 70-00-0220, V1.2, 20170131 © Vector Controls GmbH, Switzerland Page 1
Subject to alteration www.vectorcontrols.com
SRC-C1
Power supply
Operating voltage
24 V AC 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 24…12)
CO2 measurement
Sensing method
Non-dispersive infrared (NDIR) waveguide
technology with ABC automatic
background calibration algorithm
Sampling method
Diffusion
Response time (T
1/e
)
40 sec 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 signal: ≥1kΩ, current signal: ≤500Ω
Environment
Operation
Climatic conditions
Temperature
Humidity
To IEC 721-3-3
class 3 K5
0…50° C (32…122° F)
<95% RH non-condensing
Transport & storage
Climatic conditions
Temperature
Humidity
Mechanical conditions
To IEC 721-3-2 and IEC 721-3-1
class 3 K3 and class 1 K3
-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
Cover
Mounting plate
Fire proof ABS plastic
Galvanized steel
General
Dimensions (H x W x D)
21 x 88 x 88 mm (0.8” x 3.5” x 3.5”)
Weight (including package)
175 g (6.2 oz.)
88 (3.5)
88 (3.5)
21 (0.8)
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)
Mounting location
Mount the transmitter on a flat interior wall of the room to be controlled. Do avoid obstructions such as shelves,
curtains and recesses. Do not place near heat sources, draft channels. Do not expose to direct sunlight.
Doc: 70-00-0220, V1.2, 20170131 © Vector Controls GmbH, Switzerland Page 2
Subject to alteration www.vectorcontrols.com
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