Multifunctional two-setpoint 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.


The device has a binary input to select between two user-adjustable setpoints. The desired setpoint can be selected, for example, with weekly clock, turn switch or key card switch.

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
Measuring element MEMS, no flow-through
Control signal: 0…10 VDC
PID-parameters: Selectable via menu and Modbus
Zero point calibration: via Modbus or by pushbutton
Supply voltage: 24 VDC ±10 % / 24 VAC ±10 %
Power consumption: < 1.0 W
Output signal: via Modbus
Operating temperature: -20…+50 °C
Protection standard: IP54




Product series

Pressure and flow controller

Model type

Modbus communication

Measuring ranges (Pa)



With display

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