Atal AT-VLX-A2-RS-VAV User Manual

CO2/Te/RH Transmitter/Controller
Model
: AT-VLX-A2-RS-VAV
Features
➢ Indoor air quality transmitter/controller
Internal sensors to measure CO2 & temperature
➢
➢ 3-color TFT screen display + 3-color alarm indication
➢ Four function keys to adjust setpoints
➢ Providing 2x analog outputs
➢ Linear or PID output selectable for analog
➢ Modbus RS485 interface to connect to BMS/PLC
➢ 24VAC/VDC power supply
Specification
Carbon Dioxide
Detecting gas
Gas sensor
Accuracy@25°C
Stability
Calibration
Lifetime of NDIR CO2 sensor
Response time
Sample time
Warm up time
CO2 measuring range
CO2 display resolution
Temperature
Temperature sensor (selectable)
Measuring range
Accuracy
Electrical Specification and Functions
Power supply
Power consumption
LCD screen
Output
Communication interface
Operation Condition
Working condition
Carbon Dioxide (CO2)
NDIR sensor
±50ppm + 3% reading or ±75ppm (whichever is greater)
<2% of FS over lifetime (15 years) of sensor
ABC Logic self-calibration
15 years (normal using)
<2 minutes for 90% step change
Every 2 sec
2 hours (first time or startup after power failure)
2 min (operation)
0~2000ppm (default)
0~5000ppm (selected in Advanced Setup)
1ppm
NTC thermistor
0~50°C (default)
<±0.5°C@25°C
24VAC/VDC
5.5 W max. ; 2.5 W avg.
3-color TFT screen, with 4 function keys
2× analog ouotputs
Analog: linear (0~10V or 4~20mA) or PID
Modbus RS485
0~50℃; 0~95%RH, non condensing
User Manual
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