Key Parameters
Core Features & Advantages
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Highest Precision with Temperature Calibration: The module's standout feature is its extraordinary accuracy of ±0.005%, maintained across the entire operating temperature range. This is achieved through integrated temperature calibration, making the AI204/2 ideal for the most demanding measurement applications in industrial processes .
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Extremely Fast and Flexible Data Acquisition: With a minimum sampling time of 20 µs, the module enables high-speed data acquisition for dynamic processes. The sampling time and input filter (0.33 kHz / 4 kHz) can be configured by software, providing flexibility to balance speed and noise suppression .
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Robust Industrial Design and Isolation: The module offers 500 V galvanic isolation both between individual channels and from the system, protecting against ground loops and electrical noise . Its wide operating temperature range of -30°C to +60°C ensures reliable performance in harsh industrial environments .
Typical Applications
The AI204/2 is widely used for precision voltage measurement in a variety of industries, including:
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Process Control: Monitoring temperature, pressure, flow, and level transmitters with voltage outputs in chemical, oil & gas, and power generation plants.
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Machine Automation: Interfacing with position sensors, load cells, and feedback devices in packaging, material handling, and assembly systems.
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Data Acquisition: Capturing high-fidelity signals from sensors and transducers for centralized monitoring and analysis.
Frequently Asked Questions (FAQ)
Q1: What is the difference between AI204/1, AI204/2, and AI204/4?
A: The models differ only in the number of input channels. The AI204/1 provides 1 channel (part number 00010693-20), the AI204/2 provides 2 channels (00010693-10), and the AI204/4 provides 4 channels (00010693-00). All share the same 16-bit resolution, ±10V range, and high precision .
Q2: Can I measure current (4-20 mA) signals with this module?
A: No. The AI204/2 is specifically designed for ±10 V voltage signals. For current (0-20 mA) inputs, you should use the AI204/SI module (part number 00012245-00 for 4 channels) .
Q3: What is the significance of the "differential" input?
A: A differential input measures the voltage difference between its two inputs, providing high immunity to common-mode noise. The module has a permitted common-mode voltage of max. ±2 V and a common-mode rejection of >66 dB, ensuring accurate measurements in noisy industrial environments .
Q4: What is the channel-to-channel isolation of the AI204/2?
A: The module features single isolated architecture, meaning the inputs share a common reference point relative to the backplane. External signal conditioners or isolators should be used if field devices have disparate ground potentials .
Q5: What accessories are available for this module?
A: Bachmann offers terminal sets for connection, such as screw-type terminal sets (SS-AI204/2 B+C) and cage clamp terminal sets (KS-AI204/2 B+C), with labeling strips and coding elements .
Recommended Models
The AI204/2 is part of a family of high-precision analog input modules from Bachmann, offering different channel counts and signal types. Here are recommended related models:
