About

SIMATIC S7-1500 Analog Input Module AI 8xU/I/RTD/TC STThe SIMATIC S7-1500, AI 8xU/I/RTD/TC ST is a versatile analog input module designed for use with SIMATIC S7-1500 systems. It provides 8 analog input channels for connecting various sensors and devices.Key Features: - 8 analog input channels: Connect up to 8 sensors or devices- Multi-functional inputs: Supports U/I, RTD, and TC sensors- High-precision conversion: Accurate analog-to-digital conversion- Compact design: Space-saving installationTechnical Specifications: - Module type: AI 8xU/I/RTD/TC ST- Number of inputs: 8- Input type: Analog (U/I, RTD, TC)- Resolution: High-precision conversion- Compatibility: SIMATIC S7-1500 systems 

SIMATIC S7-1500 AI Module – 6ES7531-7KF00-0AB0

• Product type: AI 8xU/I/RTD/TC ST
• Resolution: 16-bit
• Accuracy: ±0.3 %
• Channels: 8 analog inputs (grouped in 8; 4 channels for RTD)
• Common mode voltage: 10 V
• Front connector: To be ordered separately (screw or push-in terminals included)
• HW functional status: FS04
• Firmware version: V2.0.0 (FW update possible)

Product Functions

• I&M data: Yes (I&M0 to I&M3)

• Isochronous mode: No

• Measuring range scalable: No

• Adjustment of measuring range: No

• STEP 7 / TIA Portal compatible: Yes (from V5.5 SP3 / V12)

• Reparameterization & Calibration possible in RUN: Yes

• Oversampling: No

• MSI: Yes

Supply Voltage

• Rated value: 24 V DC

• Permissible range: 19.2 … 28.8 V DC

• Reverse polarity protection: Yes

• Max. input current: 255 mA (at 19.2 V supply)

Encoder supply:

• 24 V, max 20 mA (short-circuit protected, max 47 mA per channel <10 s)

Power consumption:

• From backplane bus: 0.7 W

• Power loss (typ.): 2.7 W

Analog Inputs

Number of inputs: 8

• Current: 8

• Voltage: 8

• Resistance / RTD: 4

• Thermocouple: 8

Voltage input limits: max 28.8 V
Current input limits: max 40 mA

RTD measurement currents (typical):

• Pt100/Pt200/Ni100: 1.25 mA

• Pt500/Pt1000/Ni1000/LG-Ni1000/PTC: 0.625–0.472 mA

Temperature units adjustable: °C / °F / K

Input ranges (examples):

• Voltage: -10 … +10 V, -5 … +5 V, 1 … 5 V, etc.

• Current: 0 … 20 mA, 4 … 20 mA, -20 … +20 mA

• Thermocouples: Type B, E, J, K, N, R, S, T

• RTDs: Pt100, Pt200, Pt500, Pt1000, Ni100, Ni1000, LG-Ni1000

• Resistors: 0 … 150 Ω, 0 … 6000 Ω, PTC

Cable length max:

• Shielded: 800 m (U/I), 200 m (R/RTD), 50 m (TC)

Analog Value Generation

• Resolution: 16 bit (including sign)

• Integration time (ms): 2.5 / 16.67 / 20 / 100 (parameterizable)

• Basic conversion time: 9 / 23 / 27 / 107 ms

• Wire-break detection: Yes (only for 1–5 V, 4–20 mA, TC, R, RTD)

Interference suppression:

• Frequencies: 10 / 50 / 60 / 400 Hz

• Common mode voltage: max 10 V

Errors / Accuracy

• Linearity error: ±0.02 %

• Temperature error: ±0.005 %/K (TC type T: ±0.02 %/K)

• Operational error limits (Voltage/Current/Resistance/RTD): ±0.3 %

• Basic error limit (25 °C): Voltage/Current/Resistance: ±0.1 %

• Thermocouples: Type-dependent, e.g., Type K: ±1.2 K

Diagnostics / Status

• Diagnostics: Yes

• Diagnostic alarm: Yes

• Limit value alarm: Yes (2 upper, 2 lower per channel)

• Monitoring of supply voltage: Yes

• Wire-break: Yes

• Overflow/underflow: Yes

LEDs:

• RUN: Green

• ERROR: Red

• Supply voltage (PWR): Green

• Channel status: Green

• Channel/module diagnostics: Red

Potential Separation / Isolation

• Between channels: No

• Between channels in groups of 8: Yes

• Between channels and backplane bus / electronics power supply: Yes

• Permissible potential difference: 10–20 V DC

• Isolation tested: 707 V DC

Ambient Conditions

• Operation (horizontal): -25 … 60 °C

• Operation (vertical): -25 … 40 °C

• Installation altitude: max 5,000 m

• Weight: ~310 g

• Dimensions: 35 × 147 × 129 mm (W × H × D) 

Technical Details