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 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
Measuring units: Pressure: Pa, kPa, mbar, inchWC, mmWC, psi
Flow: m3/s, m3/hr, cfm, l/s, m/s, ft/min
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: Automatic with autozero element (-AZ) or by pushbutton
Supply voltage: 24 VDC ±10 % / 24 VAC ±10 %
Power consumption: < 1.0 W
Operating temperature: -10…+50 °C (with autozero calibration -5...+50 °C)
Protection standard: IP54




Product series

PID controller for differential pressure or air flow with Modbus

Highest available measurement range

0...2500 Pa


With display