Detailed Description:
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High-Precision Temperature Measurement: The module incorporates a high-resolution, high-precision analog-to-digital converter optimized for low-level millivolt signals, enabling accurate measurement of temperature signals from RTDs and TCs.
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Extensive Sensor Compatibility:
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Resistance Temperature Detectors (RTD): Supports various types such as Pt100, Pt200, Pt500, Pt1000, Ni100, Ni200, etc., with wiring options for 2-wire, 3-wire, or 4-wire configurations.
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Thermocouples (TC): Supports standard types including J, K, T, E, N, R, S, U, etc., with support for internal or external cold junction compensation.
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High Resolution & Accuracy: The module offers a high resolution of up to 16 bits (including sign bit) and excellent measurement accuracy with low typical error, ensuring reliable temperature readings.
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Diagnostic Functions: Features comprehensive diagnostic capabilities, able to detect sensor wire break, overrange, module-to-backplane bus communication faults, etc., and report diagnostic information to the CPU.
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Electrical Isolation: All analog input channels are optically isolated from the backplane bus, and the channels are also isolated from each other, enhancing system noise immunity and measurement stability.
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Flexible Configuration: Module parameters (such as sensor type, measuring range, filter time) can be configured in detail via STEP 7 software and stored in the CPU. The CPU automatically transfers these parameters to the module upon power-up or restart.
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Compact Design: A standard S7-300 module with a width of 40 mm, easily mounted on a DIN rail.
Key Specifications:
| Parameter | Details |
|---|---|
| Model | 6ES7331-7TF01-0AB0 |
| Series | SIMATIC S7-300 |
| Module Type | Analog Input (AI), High-Precision Temperature Measurement |
| Number of Channels | 8 |
| Supported Sensor Types | RTD: Pt100, Pt200, Pt500, Pt1000, Ni100, Ni200, etc. (2/3/4-wire) TC: J, K, T, E, N, R, S, U, etc. |
| Input Range | Depends on sensor type (e.g., Pt100: -200°C to +850°C) |
| Resolution | 16 bits (including sign) |
| Basic Error Limit | Typically ±0.1% (full scale, depends on sensor and range) |
| Conversion Time | Typically 55 ms per channel (depends on interference frequency suppression setting) |
| Diagnostics | Wire Break, Overrange, Module Fault |
| Isolation | Channels isolated from each other, optical isolation between channels and backplane bus |
| Width | 40 mm |
| Required Engineering Software | STEP 7 (e.g., TIA Portal) |
