90 DS-DPS-X-2-EN-000 - 28 / 11 / 18 www.sentera.eu DPS -2 Differential pressure / Air flow transmitter Key features • Built-in digital high resolution differential pressure sensor • Air velocity detection (by using an external PSET-PTX-200 Pitot tube connection set) • Variety of operating ranges and measurement windows • Selectable response time: 0,1—10 s • Implemented K-factor • Differential pressure, air volume (1) or air velocity (2) readout via Modbus RTU • 4-digit 7-segment LED display for indicating differential pressure or air volume flow • Modbus registers reset function (to factory pre-set values) • Selectable internal voltage source for PWM output: 3,3 / 12 VDC • Four LEDs with light guides for transmitter status indication • Modbus RTU communication • Sensor calibration procedure • Selectable minimum and maximum operating ranges • Selectable analog / digital output • Aluminium pressure connection nozzles Technical specifications Power supply G-version 18—34 VDC / 15—24 VAC ±10 % F-version 18—34 VDC Maximum power consumption G-version 3,3 W (VAC) / 1,71 W (VDC) F-version 1,8 W Average power consumption in normal operation G-version 2,475 W (VAC) / 1,28 W (VDC) F-version 1,35 W Imax G-version 220 mA (VAC) / 95 mA (VDC) F-version 100 mA Selectable analog / digital output 0—10 VDC mode min. load 50 kΩ (R L ≥ 50 kΩ) 0—20 mA max. load 500 Ω (R L ≤ 500 Ω) PWM PWM Frequency: 1 kHz, min. load 50 kΩ (R L ≥ 50 kΩ) Minimum differential pressure range span 50 Pa Minimum volume flow range span 10 m 3 /h Minimum air velocity range span 1 m/s Operating modes Differential pressure Air volume (1) Air velocity (2) Accuracy ±2 % of the operating range Protection standard IP65 (according to EN 60529) Ambient conditions Temperature -5—65 °C Rel. humidity < 95 % rH (non-condensing) Standards • Low Voltage Directive 2014/35/EC • EMC Directive 2014/30/EC: EN 61000-6-2: 2005/AC:2005, EN 61000-6-3:2007/A1:2011/AC:2012, EN 61326-2-3:2013 • WEEE Directive 2012/19/EC • RoHs Directive 2011/65/EC (1) Only when K-factor of fan / drive is known. If K-factor is unknown, air volume flow can be calculated via multiplying the duct cross-sectional area (A) by the air flow velocity (V) using the formula: Q = A * V (2) By using an external PSET-PTX-200 Pitot tube connection set (3) In case of 3-wire connection, the analog output GND signal is internally connected with the GND of the power supply. Therefore, G and F-type devices cannot be used together in the same network. G and F-type devices must be supplied with separate power supplies. Do not connect the GND terminals of G and F-type devices together! Article codes Operating ranges Connections DPS-G-1K0-2 DPS-F-1K0-2 0—1.000 Pa 3-wire (3) (common ground) 4-wire (separate grounds) DPS-G-2K0-2 DPS-F-2K0-2 0—2.000 Pa 3-wire (3) (common ground) 4-wire (separate grounds) DPS-G-4K0-2 DPS-F-4K0-2 0—4.000 Pa 3-wire (3) (common ground) 4-wire (separate grounds) DPS-G-10K-2 DPS-F-10K-2 0—10.000 Pa 3-wire (3) (common ground) 4-wire (separate grounds) Area of use • Differential pressure, Air flow volume (1) or air flow velocity (2) measurement in HVAC applications • Differential pressure / air flow monitoring in clean rooms • Clean air and non-aggressive, non-combustible gases Wiring and connections Vin G-version: 18—34 VDC / 15—24 VAC ±10 % F-version: 18—34 VDC GND Ground / AC ~ A Modbus RTU (RS485), signal A /B Modbus RTU (RS485), signal /B AO1 Analog / digital output (0—10 VDC / 0—20 mA / PWM) GND Ground Connections Cable cross section 1,5 mm 2 Cable clamping range 3,5 mm Attention: G and F-types devices cannot be used together on the same network. G and F-type devices must be supplied by separate power supplies. Do not connect the GND terminals of G and F-type devices together. The DPS-2 series are high resolution differential pressure transmitters with analog / digital output (0—10 VDC / 0—20 mA / PWM), which are equipped with a fully digital pressure transducer designed for a wide range of applications. These transmitters have a tact switch to activate manually zero point calibration and reset the internal Modbus registers to their default values. Air flow velocity readout is available by connecting an external Pitot tube connection set. All parameters are accessible via Modbus RTU. S.1.6.O.72