Siemens 6ES7531-7NF00-0AB0 | SIMATIC S7-1500 Analog Input Module AI 8xU/I HF

Specifications

• Channels: 8 analog inputs, galvanically isolated per channelcache.industry.siemens.com
• Input Types (per channel configurable):
  • Voltage: ±10 V, ±5 V, ±2.5 V, 0–10 V, 0–5 V
  • Current: 4–20 mA, 0–20 mA
• Resolution: 16‑bit (incl. sign), up to 24‑bit with oversamplingcache.industry.siemens.com
• Accuracy: ±0.1% of full scale (at 25 °C)
• Integration Time:
  • Fast mode: min. 2.5 mscache.industry.siemens.com
  • Standard mode: min. 7.5 mscache.industry.siemens.com
• Common‑Mode Voltage: 30 V AC / 60 V DC
• Diagnostics: Channel‑level diagnostics (wire break, over/under range)cache.industry.siemens.com
• Alarms: Process alarms (4 configurable limits per channel)cache.industry.siemens.com
• Calibration: Supported during RUN (no downtime)
• Backplane Power: 180 mA typ.
• Dimensions (W×H×D): 35 × 147 × 129 mm
• Weight: ~0.35 kg
• Operating Temperature: −20 °C to +60 °C
• Certifications: CE, UL, RoHS
• Compatibility: TIA Portal ≥ V13 SP1, STEP 7 ≥ V5.5 SP3cache.industry.siemens.com

Key Features

1. High Precision: 16‑bit resolution, 0.1% accuracy, ideal for precision process measurement。
2. Channel Isolation: Each input is isolated, reducing crosstalk and noisecache.industry.siemens.com。
3. Flexible Ranges: Software‑selectable voltage/current ranges per channelcache.industry.siemens.com。
4. Fast & Standard Modes: Balances speed and noise rejection for diverse applicationscache.industry.siemens.com。
5. Run‑Time Calibration: Calibrate without stopping the process。
6. Rich Diagnostics: Enables predictive maintenance and quick troubleshootingcache.industry.siemens.com。

Applications

• Process control (temperature, pressure, flow, level sensors)
• Analog signal acquisition in factory automation
• High‑precision measurement in pharmaceutical, food & beverage, and chemical industries
• Integration with ET200MP distributed I/O systems