Analog input module | 16 inputs | 24VDC | 6ES7531-7MH00-0AB0 Siemens

Technical specifications
Manufacturer: Siemens
Series: SIMATIC S7-1500
Model: AI 16xI BA (6ES7531-7MH00-0AB0)
Inputs: 16 analog inputs (for current measurement)
Resolution: 16-bit
Accuracy: ±0.5% across the entire temperature range
Measuring ranges:
• 0…20 mA
• -20…+20 mA
• 4…20 mA (with wire break diagnostics)

Input resistance: 25 Ω + PTC protection (~42 Ω)
Max. input current: 40 mA
Conversion time: 10 / 24 / 27 / 107 ms (configurable)
Noise suppression: 50 / 60 / 400 / 10 Hz
Diagnostics: wire break (4–20 mA), overflow, underflow, limit values, error indicators LED (green/red)
Power supply: 0.85 W (from bus)
Protection: galvanic isolation between module and bus
Operating temperature: -30 °C … +60 °C (horizontal)
Dimensions: 35 × 147 × 129 mm
Weight: ~250 g
Mounting: on S7-1500 base, with display holder and grounding elements

Functions

Accurate analog signal acquisition and processing.

Parameter configuration via STEP 7 TIA Portal from V16.

Integrated limit value monitoring (2 upper, 2 lower per channel).

Diagnostic functions (wire breaks, over/under input).

Signal filtering (low, medium, high level).

Configuration possible during operation (CiR – Configuration in Run).

Applications

For engineers: ideal for process control systems, measurement data acquisition, SCADA solutions.

For electricians: reliable module with convenient diagnostics, easy integration into S7-1500 systems, front connector mounted as needed.

For companies: used in production line automation, energy, chemical, pharmaceutical, oil, gas, and water supply sectors requiring continuous analog process monitoring.

Pros

High measurement accuracy (16-bit resolution, 0.5% error).

16 analog inputs in one module – cabinet space saving.

Wide configuration options via TIA Portal.

Configuration during operation (CiR).

Advanced diagnostics with LED indication.

Integrated signal filtering and noise suppression.

Cons

Requires Siemens S7-1500 CPU – cannot operate standalone.

Front connector ordered separately – extra costs.

Designed for industrial environments, may be too complex for home use.