[Introduction]
DA-50 detects various combustible & toxic gases leaked from industrial areas for gas producers, gas users, gas reservoirs, gas by-producers, and so on, in order to prevent any accidents in advance.
DA-50 converts digital signal into the 4-20㎃ standard current signal for output signal which can be transmitted to various external devices such as PLC, DDC, RECODER, and so on. Using these functions, you can easily construct the gas monitoring system more extensive as well as more comprehensive.
[Features]
◈ Digital Process
Digital process based on built-in micro processor realizes various artificial intelligent functions which result in more convenient, more accurate, and more efficient gas detection environment.
◈ Polycarbonate Housing
Polycarbonate housing which has corrosion proof material and water proof structure is the best application to detect corrosive gas.
◈ Self Diagnosis
Digital processor automatically diagnoses the sensor signal and sends 2mA error signal output on the malfunction in the sensor.
◈ LCD display with Back Light
LCD offers real-time display of gas density and back light offers easy reading even in dark area.
◈ User Programmable Menu
User programmable calibration density and detection rage offers user’s own operating functions.
◈ Multi Signal Output
Various output signals - DC 4-20mA, 2 step-relay contact, & RS-485(option) – provides best networking with all kinds of devices & equipments.
◈ 4-20mA Transmitter
4-20mA output enables stable and long distance (maximum 2.5km) signal transmission.
◈ RS-485
RS-485 enables stables stable and long distance (maximum 1.2km) signal communication.
◈ Alarm output
SPST 2 step relay contacts (AL1/AL2).
[Specification]
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Detection principle
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Catalytic, electro-chemical, NDIR, or PID
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Gas sampling
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Diffusion
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Target gas
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Refer to the list
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Density indication
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LCD display - PPM, %LEL, or %
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Response time
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Within 20 seconds, 90% / full scale
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Accuracy
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≤ ±2% / full scale
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Sensor calibration
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Calibration with switch
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Sensor parallax
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Zero – ≤ ±2% / 6 months, Span -≤ ±2% / 6 months
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User programmable
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Calibration density, detection range
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Input power
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DC 20 ~ 30V
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Output power
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4 ~ 20mA / full scale – maximum 2.5km long signal transmission
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Communication
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RS-485 – maximum 1.2km long signal transmission
with GasDNA’s own protocol
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Operating temperature and humidity
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-20℃~50℃, 5~95% RH (non-condensing)
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Signal wire
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CVVS & CVVSB 1.25sq x 3 wires - shield type
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Alarm release
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Manual or Automatic
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Mounting
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Wall or pipe mounting
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Housing
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Polycarbonate
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Alarm output
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2 step- relay contacts (AL1/AL2)
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