✅ General Information

• Full Name: AI531: S500, Analog Input Module, 8AI, U/I/RTD/Thermocoupler (J,K,T,N,S), 15bit+sign, 24VDC, 2/4‑wire

• Mounting: 35mm DIN rail

• Termination: Screw / spring terminals (TU515/TU516)

• Protection: IP20

• Dimensions (W×H×D): 67.5 × 76 × 62 mm

• Net Weight: ~0.13 kg

• Key Features: 8‑channel high precision, multi‑sensor (voltage/current/RTD/thermocoupler/digital), 15bit+sign resolution, 2/4‑wire connection, per‑channel LEDs, burnout detection, cold‑junction compensation (CJC)

✅ Function & Application

• Core Function: 8 analog inputs (AI): Voltage, current, RTD (Pt100/Pt1000), thermocouple (J/K/T/N/S), or digital input (DI)

• Product Profile: High‑accuracy multi‑sensor input module, designed for precision process control requiring accurate temperature (RTD/TC), pressure, flow measurement.

• System Role: AC500 local/remote I/O expansion, high‑resolution analog data acquisition.

✅ Technical Specifications

• Channel Configuration: 8AI (U/I/RTD/TC/DI), 1 group × 8 channels

• Input Ranges (AI):

  • Voltage: ±10V, 0…+10V

  • Current: 0…20mA, 4…20mA (burnout detection)

  • RTD: Pt100/Pt1000, −200…+850°C (2‑wire / 3‑wire / 4‑wire)

  • Thermocouple: J/K/T/N/S, −210…+1760°C (CJC integrated)

  • Digital Input: 24VDC logic

• Resolution: 15 bit + sign (16 bits total)

• Accuracy: ±0.05% of full scale (typical)

• Isolation: Channel‑to‑bus, channel‑to‑ground isolation

• Status Indication: Per‑channel LED (ON/OFF/error)

• Power Supply: 24VDC ±10%, ~1W

• Operating Temperature: −25…+60°C (horizontal)

✅ Compatible Accessories

• Terminal Units: TU515 (spring) / TU516 (screw)

• Expansion Cables: TK501 / TK502 (module cascading)

• Rail: Standard 35mm DIN rail

• PLC Compatibility: ABB AC500 / AC500‑eCo

• Bus Modules: CI511/CI512 (EtherCAT), CI501/CI502 (Profinet)

✅ Typical Applications

• Process Industry: Chemical, oil & gas, power generation (high‑accuracy temperature/pressure/flow monitoring)

• Laboratory & Research: Precision instrumentation, environmental monitoring

• Food & Beverage: Temperature‑critical processes (sterilization, fermentation)