k33

Overview

Product Specification

CO 2 Engine ® ICB-F

Sensor module for bio applications

test/sa mple

test/sam ple

Figure 2. CO 2 Engine ® ICB-F Test/sample gas ports

Figure 3. CO 2 Engine ® ICB-F Possible test/sample gas ports installations

Functional group Descriptions and ratings

Power supply (all connection alternatives)

G+ referred to G0

Power supply plus terminal Protected by series 3.3R resistor and zener diode Absolute maximum ratings 5 to 14V, stabilized to within 10%

G0 Power supply minus terminal Sensor’s reference (ground) terminal

DVCC = 3.3V Output from sensor’s digital voltage regulator. Series resistance 10 R Available current 12mA Voltage tolerance (unloaded) +-3% max (+-0.75% typ) Output may be used to power circuit (microcontroller) in host system or to power logical level converter if master processor runs at 5V supply voltage.

Communication

UART (UART_TxD, UART_RxD)

CMOS physical layer, ModBus communication protocol. (refer “ModBus on CO2 Engine K30 rev1_07.pdf” or later version for details) UART_RxD line is configured as digital input. Input high level is 2.1V min Input low level is 0.8V max UART_TxD line is configured as digital output. Output high level is 2.3V (assuming 3.3V DVCC) min. Output low level is 0.75V max UART_RxD input is pulled up to DVCC = 3.3V by 56 kOhm UART_TxD output is pulled up to DVCC = 3.3V by 56 kOhm ABSOLUTE MAX RATING G0-0.5V ….. DVCC + 0.5V

I2C extension. (I2C_SCL, I2C_SDA)

Pull-up to DVCC = 3.3V. (refer “I2C comm guide rev2_00 DRAFT.pdf” or later version for details) ABSOLUTE MAX RATING G0-0.5V ….. DVCC + 0.5V

Outputs

OUT1, OC (Open collector)

Digital output, Open collector Series resistance 120 R Max sink current 40mA May be configured as 1. Alarm indication output 2. PWM output, 10 (alt. 12 to 16) bit resolution. Period 1 .. 1000

msec

3. Pulse length proportional to measured CO2 value.

OUT2 Analog output 0..5V Buffered linear output 0..4 or 1..4VDC or 0..5V or 1..5V, depending on specified power supply and sensor configuration. ROUT < 100 RLOAD > 5 k Load to ground only! Resolution 5mV

Digital I/Os (Used as Inputs in standard configuration. May be implemented as jumper field)

Din0 Din1 Din2

Digital switch inputs in standard configuration, Pull-up 56k to DVCC 3.3V. Driving it Low or connecting to G0 activates input. Pull-up resistance is decreased to 4..10k during read of input or jumper. Advantages are lower consumption most of the time the input/jumper is kept low and larger current for jumpers read in order to provide cleaning of the contact. Can be used for zero or background calibration forcing.

Din3 R/T control line for UART connection to RS485 driver.

Table 1. I/O notations used in this document for the K33 platform with some descriptions and ratings (continue, see previous page). Please, beware of the red colored texts that pinpoint important features for the system integration!

Analogue ground

DGND Digital ground

Figure 4. CO 2 Engine ® ICB-F ground / shield attachment

Input Switch Terminal (normally open)

Default function (when closed for minimum 8 seconds)

Din1 bCAL (background calibration) assuming 400 ppm CO 2 sensor exposure

Din2 CAL (zero calibration) assuming 0 ppm CO 2 sensor exposure

Table 2. Switch input default configurations for CO 2 Engine ® ICB-F

Din2

Din1

Figure 5. CO 2 Engine ® ICB-F calibration jumpers.

General performance

Target Gas Carbon dioxide (CO 2 )

Storage Temperature Range -40 to +70 °C

Sensor Life Expectancy >15 years

Maintenance Interval Maintenance-free when using SenseAir ABC algorithm (Automatic Baseline Correction)

Self-Diagnostics Complete function check of the sensor module

Warm-up Time 1 min

Conformance with the standards EN 61326-1 (2006), Class B emission, Table 2 Industrial location immunity RoHS directive 2011/65/EU

Operating Temperature Range 0 to +50 °C

Operating Humidity Range Non condensing, non corrosive environment

Operating Environment Residential, commercial, industrial spaces and potentially dusty air ducts used in HVAC (Heating Ventilation and Air- Conditioning) systems 1

Electrical / Mechanical

Power Input 5-14 VDC max rating, stabilized to within 10% (on board protection circuits) 2

Current Consumption 40 mA average < 200 mA average during IR lamp ON (120 msec) < 250 mA peak power (during IR lamp start-up, the first 50 msec)

Electrical Connections 3 terminals not mounted (G+, G0, OUT1, OUT2, Din1, Din2, TxD, RxD)

Dimensions (mm) 5.1 x 5.7 x 1.4 cm (Length x Width x approximate Height)

CO 2 measurement 4

Sensing Method non-dispersive infrared (NDIR) waveguide technology with ABC (automatic background calibration algorithm)

Sampling Method diffusion or flow, subject for discussion with customer

Response Time (T1/e) <20s, diffusion or tube IN/OUT (0.2l/minute gas flow)

Measurement Range 0 to 30% vol

Digital Resolution 0.001% vol

Accuracy 4 5 ± 0.5 %vol. CO 2 ± 3 % of measured value

Pressure Dependence + 1.6 % reading per kPa deviation from normal pressure, 100 kPa

On-Board Calibration Support Din1 switch input to trigger Background Calibration @ 400 ppm (0.04%vol) CO 2 Din2 switch input to trigger Zero Calibration @ 0 ppm CO 2

Linear Signal Output: 4 6

- D/A Resolution 5 mV

- Linear Conversion Range 0 - 5 VDC for 0 – 20%vol.

- Electrical Characteristics ROUT < 100 RLOAD > 5 k , Power input > 5.5 V 6

PWM Output

Electrical Characteristics Open collector with series 120R resistor, 10k  pull-up resistor to protected power (+)

Minimum Output Concentration 0% vol

Output Cycle Period 1004 ms

Output High Level min Duration 2.0 ms (@ 0% vol )

Output High Level max Duration 1002 ms (@ 20% vol . )

Resolution 0.5 ms (@0.01% vol = 100 ppm)

Table 2. Key technical specification for CO 2 Engine ® ICB-F

Sensor PWM output timing diagram

Figure 6. CO 2 Engine ® ICB-F OUT1 timing diagram

Features

• CO 2 Engine ® ICB-F is built on the CO 2 Engine ™ K33 platform. This platform is designed to be a
• transmitter/switch module, and hence should be optimized for its tasks during a dialog between
• SenseAir and the OEM customer.
• CO 2 Engine ® ICB-F has the same dimension and attachment points as K30 platform based
• sensors. Figure 1. CO 2 Engine ® ICB-F (tube IN/OUT model) (Art. no. 033-9-0006)