DFL E RS485
Pressure and differential pressure sensor with RS485
Application
The DFL E.RS485 with or without display a pressure sensor whose signal communicates via RS485 and by means of Modbus®RTU It measures the positive, negative or differential pressure in the air. The digitally calibrated and compensated MEMS unit guarantees excellent reliability and accuracy. These pressure sensors are used in clean room, medical and filter technology, in ventilation and air conditioning ducts, in spray cabins, in commercial kitchens, for purposes of filter monitoring and fill level measurement or to control frequency inverters. The measured medium is air (non-condensing) or gaseous, non-aggressive, non-combustible media.
Technical Data
| Power supply: | 24V DC ± 20% |
| Max. current draw: | 10mA |
| Bus protocol: | RS485 Modbus®-RTU |
| Configuration option: | via Dip switches (address no., parity, baud) |
| Address number: | 1 bis 63 (0 not allowed) |
| Modbus parity mode: | no parity, even parity, odd parity |
| Transmission rate: | 4800, 9600, 19200, 38400 Baud |
| Measuring range: | ± 250, 1000, 3.000 oder 10000 Pa |
| Max. permissible overpressure: | ± 250 Pa: 7kPa |
| depending on measuring cell: | ± 1000 Pa: 10kPa ± 4000 Pa: 33kPa ± 10.000 Pa: 80kPa |
| Ambient temperature: | -20...+50°C |
| Pressure connector: | 4/6 x 11mm (hose Ø = 5/7mm) |
| Type of pressure: | Differential pressure |
| Medium: | Air, non-aggressive, non-combustible gases |
| Long-term stability: | ± 1% / 10 years |
| Measuring errors: | ± 1% incl. hysteresis, linearity, repeatability |
| Drift over temperature: | 0% (drift is already taken into account in the measurement error) |
| Housing: | ABS/PC, pure white (similar to RAL9010), 4 quick release screws |
| Display (optional): | LCD display in kPa |
| Dimensions: | 81 x 55 x 35 mm plus PG and air connection dome |
| Electrical connection: | 0,14 - 1,5 mm² via screw terminals |
| Cable gland: | 2 x M16, with strain relief |
| Humidity: | < 95 % r. H., non-condensing air |
| Protection class: | III (according to EN 60 730), Protection type: IP 65 (according to IEC 529) |
| Standards: | CE conformity, electromagnetic compatibility acc. to EN 61326-2-3: 2013 08 01 EMV Directive 2014/30/EU |
DFL RS485 Display
