Multifunctional differential pressure transmitters with air flow measurement and Modbus communication DPT-MOD is a multifunctional transmitter for measuring volume flow, velocity, and static and differential pressure. The measurements can be read and the configuration done via Modbus communication. DPT-MOD requires less wiring than the traditional 3-wire transmitters because multiple devices can be connected on serial line. DPT-MOD can also be used with several different measurement probes such as FloXact™ or pitot tube, and air dampers. DPT-MOD series devices include: • Two selectable functions: o Measure and monitor in-duct volume flow, velocity or differential pressure o Measure and monitor air flow across centrifugal fans • Multiple selectable measurement units: o Volume flow: m3/s, m3/h, cfm, l/s o Velocity: m/s, ft/min o Pressure: Pa, inWC, mmWC, kPa, mbar • Modbus communication protocol DPT-MOD series device options offer: • AZ (autozero) function for automatic zero point calibration, eliminating the need for periodic manual autozeroing to ensure long term accuracy Technical details Communication: RS-485 Modbus (RTU) Accuracy (from applied pressure): (model 2500) Pressure < 125 Pa = 1 % + ±2 Pa Pressure > 125 Pa = 1 % + ±1 Pa Accuracy (from applied pressure): (model 7000) Pressure < 125 Pa = 1.5 % + ±2 Pa Pressure > 125 Pa = 1.5 % + ±1 Pa Zero point calibration: automatic with autozero element (-AZ), by pushbutton or via Modbus Measuring units: Pressure: Pa, kPa, mbar, inchWC, mmWC, psi Flow: m3/s, m3/hr, cfm, l/s, m/s, ft/min Measuring element: MEMS, no flow-through Supply voltage: 24 VAC ±10 % / 24 VDC ±10 % Power consumption: < 1.0 W Output signal: via Modbus Response time: 1.0−20 s, selectable via menu or via Modbus Operating temperature: -20…+50 °C (with autozero calibration -5...+50 °C) -40C model: -40…+50 °C Protection standard: IP54
