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Datasheet: K-30 Sensor
The K30 sensor is a low cost, infrared and maintenance‐free transmitter
module intended to be built into different host devices that require CO2
monitoring data.
Applications
The K30 is an accurate, yet low cost gas sensing solution for OEMs who
wish to integrate CO2 gas sensing into their product without investing in
their own gas sensor development. The compact sized and low powered
module is intended to be an add‐on component to compliment other
microprocessor‐based controls and equipment.
The K30 may be software customized in different ways in order to
optimize the total system with respect to the OEM application.
The K30 is offered for installation in OEM IAQ sensor housings, OEM air handling units, OEM alarm sensor housings, among other
applications. The only restriction for what this product can be used for is the creativity and inventiveness of the customer.
This new product version is a RoHS compliant upgrade replacing the former the K30 product, has the same key product
performance, but now has an improved speed of response and a reduced spatial build‐in height.
Terminal Descriptions
The table below specifies what terminals and I/O options are available in the general K30 platform (see also the layout picture Fig.
2). Please note, however, that in the K30‐STA default configuration, only OUT1, OUT2, OUT3, OUT4, Din1, Din2 and Status have any
pre‐programmed functions. These are described in the chapter “Default Configuration”.
Functional group Descriptions and ratings
Power supply
G+ referred to G0: Absolute maximum ratings 5.5 to 14V, stabilized to within 10%
5V to 9V preferred operating range.
Unprotected against reverse connection!
Serial Communication
UART (TxD, RxD)
CMOS, ModBus communication protocol.
Logical levels corresponds 3.3V powered logics. Refer “ModBus on CO2
Engine K30 “ for electrical specification.
Outputs
OUT1
Buffered linear output 0..4 or 1..4VDC or 0..10V or 2..10V, depending on
specified power supply and sensor configuration. ROUT < 100 W, RLOAD > 5 kW
Load to ground only!
Resolution 10mV (8.5 bits in the range 0..4V).
OUT2
Buffered linear output 0..4 or 1..4VDC or 0..5V or 1..5V, depending on
specified power supply and sensor configuration. ROUT < 100 W, RLOAD > 5 kW
Load to ground only!
Resolution 5mV
Can be used as alternative for OUT1, or for a second data channel, or in an
independent linear control loop, such as a housing temperature stabilization
OUT3
CMOS unprotected. Digital (High/Low) output.
High Output level in the range 2.3V min to DVDD = 3.3V. (1 mA source)
Low output level 0.75V max (4 mA sink)
Revision 1.3 – May 2015
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