KSC 520 - CO2 sensor with output 4 to 20 mA

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KSC 520 - CO₂ sensor with output 4 to 20 mA

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CO₂ Sensor KSC 520 with output 4 to 20 mA are intended for installation in airconditioning ducts.

The sensor can be used for any control systems compatible with the output signal 4 to 20 mA. The working range is specified in the table of technical parameters. The sensors meet the ingress protection of IP 65 according to EN 60 529..

The sensor can be used for any control systems compatible with the MODBUS RTU communication protocol; communication takes place through the RS 485 bus. The working range is specified in the table of technical parameters. The sensors meet the ingress protection of IP 65 according to EN 60 529.

The sensors consist of a plastic head, which houses a transducer to convert the CO₂ concentration to a MODBUS RTU output signal. The measuring sensor is located in an external probe which is firmly connected to the electronics head. The probe cannot be disconnected from the head with electronics. The supply cable is connected to the terminal board through a grommet, which is a part of the plastic head. The base material of the head is LEXAN™ RESIN – EXL 5689. The sensor stem consists of two materials – stainless steel and Tecaform. Sensor is ensured by the unique „S head“ design invented by SENSIT s.r.o

The operating conditions to establish the correct function of CO₂ modul are:

Ambient temperature around the sensor: -40 °C to 80 °C
Relative ambient humidity: 0 to 100 %
Atmospheric pressure: 87 to 106 kPaTESTS, DECLARATION, CALIBRATIONS

TESTS, DECLARATION, CALIBRATIONS

The type tests are carried out by a notified body according to EN 50155 standard, as amended, Railway applications – Electronic equipment used on rolling stock.

Electromagnetic Compatibility in accordance with EN 50121-3-2, as amended
Insulation test in accordance with EN 50155, as amended
Shock and vibration tests in accordance with EN 61373, as amended

The product meets parameters in accordance with EN 45545-2, as amended, Fire protection on railway vehicles - Part 2: Requirements for fire behavior of materials and components. Can be supplied with materials complying with fire safety standard NFPA 130, as amended.

Manufacturer provides EU Declaration of Conformity.

Technické parametry

Sensor type	KSC 520
Measuring value	CO₂
Output signal	4 to 20 mA
CO₂ measuring range*	0 až 5000 ppm
CO₂ measuring accuracy*	± 50 ppm (+3 % measured values)
Temperature and pressure dependence	± (1 + measured value of CO₂ / 1000) ppm/°C 0,014 % of measured value of CO2/mbar
Response rate	60 s
UCC supply voltage range	16,8 to 30 VDC
Recommended UCC supply voltage	24 VDC
Consumption	maximum: 750 mW, typical: 250 mW
Ingress protection	IP 65 electronic, IP 40 sensor in accordance with EN 60529
Recommended supply line	Wire cross-section: 0.14 to 0.5 mm2 Outer cable diameter 4 to 8 mm
External probe material	Stainless steel DIN 1.4301 + TECAFORM AH NATURAL 38.5 g
Sensor dust filter	Filtration capacity 0.025 mm
Material of the head	LEXAN™ RESIN – EXL 5689
Dimension of the head	70 × 63 × 35 mm
External probe length	Standard 146 mm
Sintered bronze sensor cover (length)	29 mm
External probe diameter	30 mm
Weight	min. 200 g

Tests
Shock and vibration tests	category 1, class B in accordance with EN 61373, as amended
Elektromagnetic compatibility	in accordance with EN 50121-3-2, as amended
Insulation test	1.5 kVDC for time 1 minute in accordance with EN 50155, as amended
Fire protection resistance	in accordance with EN 45545 (possible acc. to NFPA 130), as amended