MODBUS Differential pressure / Volume flow controller for HVAC - DPC200-MOD
Differential presssure / volume flow controller
Electromechanical diaphragm measuring system
Configuration via Modbus communication
Selectable measurements (differential pressure or volume flow)
Selectable units (Pa / InH20 or m3/h or cfm)
Selectable control mode or measuring mode
Control mode with adjustable: setpoint, maximum output voltage, P and I parameterd for PI-algorithm, direct or inverse sense
Adjustable k-factor for volume flow calculation
Analog output 0…10 V
Alphanumeric LCD-display
Supply voltage 22…26 Vdc; 24 Vac (+/-10%)
Compact plastic housing IP 54
The DPC200-MOD has been developed to bundle functions needed in the HVAC industry into one device. As a precise differential pressure sensor it can transmit measurements for both pressure and air flow. The integrated PI control logic is an important component in decentralized closed loop control systems, where pressure and air flow have to be constantly controlled.
The additional Modbus RTU interface is intended for the digitalisation of industrial processes. All device parameters can be read and written with the Modbus RTU interface.
For direct analog processing, a 0 … 10 V signal output is available. This signal can be configured as a linear / square root measuring signal, or as a manipulated variable of the closed loop controller.
It can be used, for example, in air-conditioning technology for controlling fans, monitoring room pressure or controlling filters.
Operating mode:
Measuring mode or control mode
Measuring medium:
Air or non-aggressive gases
Measuring principle:
Electromechanical diaphragm measuring system
Measuring unit:
Pa / inH2O or m3/h or cfm
Smallest measuring range:
0…50 Pa (0.5 mbar) / 0.2 InH20
Largest measuring range:
0…6000 Pa (60 mbar) / 24 InH20
Measuring range:
0…50 Pa (0.5 mbar), 0…100 Pa (1 mbar), 0…500 Pa (5 mbar), 0…1000 Pa
(10 mbar), 0…2000 Pa (20 mbar), 0…4000 Pa (40 mbar), 0…6000 Pa (60 mbar)
Measuring range selection:
Factory preset
Adjustable controlling parameters:
P/I – parameter, k-factor, maximum output voltage, normal/ inverse control
Characteristic:
linear for pressure measurement, radiated for volume flow measurement
Ambient temperature:
-10…+50°C
Storage temperature:
-25…+60°C
Control characteristic:
PI – algorithm
Setpoint settings:
2 setpoints can be set via keys, selection of setpoints via potential free contact
Protocol:
Modbus RTU
Baud rate:
selectable in menu, 7200…57600
device adress / ID:
selectable in menu, 1…247
Parity check:
selectable in menu, none, even, odd, none2stopbits
Telegram structure:
8 Bit ID; 8 Bit FC; 16 Bit DA; 16 Bit D; 16 Bit CRC
Overpressure protection:
0.2 bar
Static pressure:
max. 0.2 bar
Zero point calibration:
Adjustable by REEDcontact, no cyclic zero-point calibration required
Reaction time:
direct
Zero drift:
±0.75%
Sum of linearity and hysteresis:
± 0.5 % … ± 1 %
Temperature drift zero point:
±0.3% / 10K
Temperature drift measuring range:
±0.2% / 10K
Housing:
UL 94 HB; Ultramid with hinged lid of ABS
Dimensions:
95 x 70 x 54 mm (w x h x d)
Weight:
approx. 250g
Protection class:
IP54 according EN60529
Display:
Two-line alphanumeric LCD display, 2 x 16 characters
Electrical connections:
Cable entry M16x1.5, screw terminals, electronics protected against incorrect polarity
Cable entry:
2 x M16
Pressure connections:
Hose connections 5 mm ø and 6 mm ø
Operational position:
Vertical, position dependence when rotated through 90 ° approx. 25 Pa
Power supply:
22…26 Vdc; 24 Vac (±10%)
Power consumption:
approx. 50 mA @ 24 Vdc; < 2 W Power
Output:
0…10 V; Imax= 1.0 mA, Rmin = 10 kΩ
EMC:
EN 61000-6-2, EN 61000-6-3, CE-mark
RoHS:
According RoHS-directive 2011/65/EU
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