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wireless

Electronic differential pressure switch and transmitter

DPI

The DPI series electronic pressure measuring devices are engineered for building automation in HVAC/R industry. The most technologically advanced and versatile electronic differential pressure switches on the market, combining up to two relay outputs and 0–10 V output options.
The DPI includes the following field selectable features:

• Configurable Switching Point: Open on rise or fall in pressure
• Hysteresis of setpoint
• Measurement units (Pa, kPa, mmWC, inWC, mbar)
• Measurement range (4 ranges per model)
• Output signal (0−10 V, NO/NC)
• Span and zero point calibration

Applications

DPI series devices are commonly used in HVAC/R systems for:
• fan, blower and filter monitoring
• staircase pressure monitoring and alarm
• pressure monitoring in cleanrooms
• boiler pressure monitoring and alarm


Technical specifications

Bursting pressure:
30 kPa

Suitable media:
Air and non-aggressive gases

Measuring element:
Piezoresistive

Accuracy (%/FS*)
±0,7 % (±1,5 % initial)
*) %/FS from highest pressure range (including: general accuracy, temperature drift, linearity, hysteresis and repetition error). Initial value is the factory calibration accuracy; better accuracy can be achieved with span point calibration.

Electrical interface:
• Supply voltage: 21–35 VDC / 24 VAC ± 10 %,
with AZ option: 24 VDC / VAC ± 10 %
• Current consumption:
35 mA + relays (7 mA each) + AZ (20 mA) +
0…10 V output (10 mA)
• Output signals, basic version:
Relay output (250 VAC / 30 VDC / 6 A)
0…10 V, L min 1 kW
• Output signals, 2R version:
Relay output 1 (250 VAC / 30 VDC / 6 A)
0…10 V, L min 1 kW

Materials:
• Housing: ABS
• Cover: PC
• Pressure connections: ABS
• Duct connectors: ABS
• Tubing: PVC

Connections:
• Electrical connections: Power and 0…10 V out, 3 x screw terminals, max 1.5 mm2
• Relays 2 x SPDT, 6 x screw terminals, max 1.5 mm2
• Cable entries: M16 and M20
• Pressure connections: Male, Ø 5,0 mm and 6,3 mm

Weight:
150 g, with accessories 290 g

Dimensions:
89.0 x 86.5 x 37.1 mm

General ambient condition:
Temperature range:
• Operation: -10…+50 °C (-5…+50 °C for -AZ model)
• Storage: -20…+70 °C
Ambient humidity: 0 to 95 % rH

Safety:
Protection standard: IP54

Conformance:
Meets the requirements for CE marking:
• EMC Directive 2004/108/EY
• Rohs Directive 2002/95/EY

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