Multifunctional PID controller with differential pressure or air flow transmitter and Modbus communication. DPT-Ctrl-MOD enables to control constant pressure or flow of fans, VAV systems or dampers. In addition, the controller is fully programmable via Modbus. The DPT-Ctrl-MOD includes an Input terminal that enables the reading of multiple signals such as temperature or control relays over Modbus. The Input terminal has one input channel designed to accept 0−10 V, ntc10k, Pt1000, Ni1000/(-LG), and BIN IN (potential free contact) signals. Technical details Communication: RS-485 Modbus (RTU) Accuracy (from applied pressure): (model 2500) Pressure < 125 Pa = 1 % + ±2 PaPressure > 125 Pa = 1 % + ±1 Pa Accuracy (from applied pressure): (model 7000) Pressure < 125 Pa = 1.5 % + ±2 PaPressure > 125 Pa = 1.5 % + ±1 Pa Measuring units: Pressure: Pa, kPa, mbar, inchWC, mmWC, psiFlow: m3/s, m3/hr, cfm, l/s, m/s, ft/min Measuring element MEMS, no flow-through Control signal: 0…10 V or 4…20 mA (selectable by jumper) Output signal for pressure or air flow (selectable via menu): 0…10 VDC, Load R minimum 1 kΩ or 4…20 mA, maximum load 500 Ω (selectable by jumper) PID-parameters: Adjustable via menu Zero point calibration: via Modbus or by pushbutton Supply voltage: 24 VDC ±10 % / 24 VAC ±10 % Power consumption: < 1.0 W Operating temperature: -20…+50 °C (with autozero calibration -5...+50 °C) Protection standard: IP54
