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AEG AS-BDA0-21
Product Name: AEG AS-BDA0-21 Analog Sensor Module — Differential Pressure / Temperature
Product Introduction:
The AEG AS-BDA0-21 is an analog sensor transmitter module designed for building automation and HVAC applications. It measures differential pressure or temperature (configurable via DIP switches) and outputs a 4–20 mA or 0–10V signal proportional to the measured value.
Detailed content
Model Series: AS-BDA Series (Analog Sensors)
Technical Specifications:
- Measurement Type: Differential Pressure (0–1000 Pa) OR Temperature (-20°C to +120°C) — selectable via DIP switch
- Output Signal: 4–20 mA (2-wire) OR 0–10V (3-wire) — selectable via DIP switch
- Supply Voltage: 24V DC (±20%)
- Accuracy: ±0.5% of full scale (pressure) / ±0.3°C (temperature)
- Response Time: <200 ms (T90)
- Operating Temperature: -25°C to +70°C
- Protection Rating: IP65 (housing)
- Housing Material: Polycarbonate (PC) with stainless steel sensing element
- Electrical Connection: M12 connector (4-pin) or screw terminal (2.5 mm²)
- Dimensions: 80 mm × 40 mm × 25 mm
- Weight: 120 g
Functional Features:
- Dual-range selectable via internal DIP switches (no external tools required)
- Zero and span calibration via potentiometer on PCB (accessible through housing)
- Reverse polarity protection on power input
- Loop-powered (2-wire) option — no separate power supply needed
Working Principle:
A piezoresistive silicon diaphragm (for pressure) or PT1000 RTD element (for temperature) converts the physical measurement into a resistance change. An on-board ASIC signal conditioner converts this to a linear 4–20 mA current loop or 0–10V voltage output using a precision 16-bit DAC.
Advantages & Highlights:
- IP65 rated — suitable for outdoor and damp locations
- Loop-powered option reduces wiring complexity
- DIP-switch configuration — no software or PC tool required for setup
- Long-term stability: <0.1% drift per year
Applicable Industries:
- Building automation (BMS/BAS)
- HVAC air handling units
- Clean room pressure monitoring
- Process industry (non-hazardous)
Installation Requirements:
- Mount with pressure ports horizontal (for differential pressure mode)
- Use shielded twisted-pair cable for 4–20 mA output (max 500 m)
- Provide straight pipe runs of 5× pipe diameter upstream and downstream
Usage Precautions:
- Do not exceed 1000 Pa differential pressure (pressure mode)
- Calibrate annually using certified reference instruments
- Protect M12 connector from water ingress when not mated
- Do not disassemble housing — recalibrate via external potentiometer only
