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Catalogue Differential Pressure

9 www.bdsensors.com DMD 331 Differential Pressure Transmitter Technical Data Input pressure range Nominal pressure [bar] 0.2 0.4 1 2.5 6 16 Differential pressure range [bar] 0 ... 0.02 up to 0 ... 0.2 0 ... 0.04 up to 0 ... 0.4 0 ... 0.1 up to 0 ... 1 0 ... 0.25 up to 0 ... 2.5 0 ... 0.6 up to 0 ... 6 0 ... 1.6 up to 0 ... 16 Permissible static pressure, one-sided [bar] 0.5 1 3 6 20 60 Output signal / Supply Standard 2-wire: 4 ... 20 mA / VS = 12 ... 36 VDC Option IS-version 2-wire: 4 ... 20 mA / VS = 14 ... 28 VDC Option 3-wire 3-wire: 0 ... 10 V / VS = 14 ... 36 VDC Performance Accuracy IEC 60770 1 : ≤ ± 0.5 % FSO Permissible load current 2-wire: Rmax = [(VS – VS min) / 0.02 A] Ω voltage 3-wire: Rmin = 10 kΩ Influence effects supply: 0.05 % FSO / 10 V load: 0.05 % FSO / kΩ Long term stability ≤ ± 0.2 % FSO / year Response time < 5 msec 1 accuracy according to IEC 60770 – limit point adjustment (non-linearity, hysteresis, repeatability) Thermal effects 2 (Offset and Span) / Permissible temperatures Nominal pressure PN [bar] 0.2 0.4 ≥ 1.0 Tolerance band [% FSO] ≤ ± 2.5 ≤ ± 2 ≤ ± 1.5 TC, average [% FSO / 10 K] ± 0.4 ± 0.3 ± 0.2 in compensated range [°C] 0 ... 50 0 … 70 Permissible temperatures medium: -25 ... 125 °C electronics / environment: -25 ... 85 °C storage: -40 ... 100 °C 2 relating to nominal pressure range Electrical protection Short-circuit protection permanent Reverse polarity protection no damage, but also no function Electromagnetic compatibility emission and immunity according to EN 61326 Mechanical stability Vibration 10 g RMS (20 ... 2000 Hz) Shock 100 g / 11 msec Materials Pressure port stainless steel 1.4404 (316L) Housing aluminium, black anodized Seals (media wetted) FKM / others on request Diaphragm stainless steel 1.4435 (316L) Media wetted parts pressure port, seals, diaphragm Miscellaneous Current consumption signal output current: max. 25 mA signal output voltage: max. 7 mA Weight approx. 250 g Operational life > 100 x 106 pressure cycles Ingress protection IP 65 CE-conformity EMC Directive: 2004/108/EC Explosion protection (onla for 4 … 20 mA / 2 wire) Approvals DX13A-DMD 331 IBExU 08 ATEX 1125 X zone 1: II 2G Ex ia IIC T4 Safety technical maximum values Ui = 28 VDC, Ii = 93 mA, Pi = 660 mW, Ci ≤ 1 nF, Li ≤ 10 µH, the supply connections have an inner capacity of max. 27 nF to the housing Permissible temperatures for environment -20 ... 60 °C bei patm 0,8 bar up to 1,1 bar Pin configuration Electrical connection ISO 4400 Supply + Supply – Signal + (only 3-wire) 1 2 3 Shield ground pin DMD 331 Technical Data

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