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The 140ACI03000 is an 8-channel differential Analog Input (AI) module for the Modicon Quantum platform by Schneider Electric. It is designed for high-accuracy signal acquisition in electrically noisy industrial environments.
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The 140ACI03000 is an 8-channel differential Analog Input (AI) module for the Modicon Quantum platform by Schneider Electric. It is designed for high-accuracy signal acquisition in electrically noisy industrial environments.
Unlike single-ended modules, the 140ACI03000 uses differential inputs, effectively rejecting common-mode noise and minimizing ground loop interference. It supports both 4–20 mA current loops and 1–5 V DC voltage inputs, offering flexibility for various field transmitters.
With a fast 5 ms update time, 12-bit resolution, and integrated diagnostics (broken wire and undervoltage detection), the module ensures reliable and stable data delivery for PID control loops and safety-critical monitoring. A built-in low-pass filter (-3 dB at 15 Hz) attenuates high-frequency noise before signal processing.
| Parameter | Specification |
|---|---|
| Model | 140ACI03000 |
| Platform | Modicon Quantum |
| Module Type | Analog Input (Differential) |
| Channels | 8 |
| Input Ranges | 4–20 mA or 1–5 V DC |
| Resolution | 12-bit |
| Addressing | 9 input words (8 data + 1 status) |
| Input Impedance | 250 Ω (Current) / >20 MΩ (Voltage) |
| Fault Detection | Broken wire (mA), Undervoltage (V) |
| Bus Current | 240 mA @ 5 V DC |
| Power Dissipation | 2 W |
| Operating Temperature | 0°C to 60°C |
| Weight | 0.3 kg |
The 140ACI03000 is ideal for:
Turbine monitoring systems in power plants
Chemical reactor temperature and pressure measurement
Water treatment flow and level monitoring
Long-distance sensor installations with high EMI exposure
Its differential architecture makes it particularly effective when sensors operate on different ground references or are located far from the PLC rack.
Q1: What is the advantage of differential inputs?
Differential inputs measure the voltage difference between two conductors, rejecting noise that appears equally on both wires and minimizing ground loop errors.
Q2: Can voltage and current inputs be mixed?
Yes. Each channel can be configured independently for 4–20 mA or 1–5 V, provided the wiring matches the selected signal type.
Q3: Does the module require external power?
The module logic is powered by the Quantum backplane. However, field transmitters typically require an external 24 V DC supply.
