GASDNA
GASDNA
Description
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.
DA-50 provides RS-485 communication signal and gas leakage alarm signal by relay contact output.
Besides, DA-50 has DC 4-20mA standard output which realizes max 2,500m long distance output signal transmission from sensor to receiver and RS-485 communication signal which realizes max 1000m long distance signal transmission.
[ Features ]
ㆍ LCD display with Back Light
ㆍ Multi Signal Output
DC 4-20mA, 2 step-relay contact, & RS-485(option) – provides best networking with all kinds of devices & equipments.
ㆍ 4-20mA Transmitter
4-20mA output enables stable and long distance (maximum 2.5km) signal transmission.
ㆍ RS-485
RS-485 enables stables stable and long distance (maximum 1.2km) signal communication.
ㆍ Alarm output
SPST 2 step relay contacts (AL1/AL2).
[ Specification ]
| Detection principle | Catalytic, electro-chemical, NDIR, or PID |
| Gas sampling | Diffusion |
| Target gas | Refer to the list |
| Density indication | LCD display - PPM, %LEL, or % |
| Response time |
within 20 seconds, 90%/full scale |
| Accuracy | ≤2% /full scale |
| Sensor calibration | Calibration with switch |
| Sensor parallax | Zero – ≤ ±1% / 6 months, Span -≤ ±1% / 6 months |
| User programmable | Calibration density, detection range |
| Input power | DC 20 ~ 30V |
| Output power | 4 ~ 20mA / full scale – maximum 2.5km long signal transmission |
| Communication | RS-485 – maximum 1.2km long signal transmission with GasDNA’s own protocol |
| Operating temperature and humidity | -20℃~50℃, 5~95% RH (non-condensing) |
| Signal wire | CVVS & CVVSB 1.25sq x 3 wires - shield type |
| Alarm release | Manual or Automatic |
| Mounting | Wall or pipe mounting |
| Housing | Polycarbonate |
| Alarm output | 2 step- relay contacts (AL1/AL2) |
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