Product Summary
The AI825 analog input module delivers four individually galvanically isolated channels for current and voltage signals. This S800 I/O module provides a 14-bit resolution plus sign for precise measurement. It accepts ±20 mA and ±10 V ranges with robust overvoltage protection.
Theme A: Product Procurement & Buyer Guide
Why Choose the AI825 for Your System
The AI825 module solves critical signal integrity issues in harsh industrial environments. Its individual channel isolation eliminates ground loop problems completely. Procurement managers gain a single module that handles both current and voltage inputs. This flexibility reduces inventory complexity significantly.
Key Technical Specifications for Engineers
This module supports bipolar signals from -20 to +20 mA and -10 to +10 V. It also handles unipolar ranges like 0 to 20 mA and 0 to 10 V. The 14-bit resolution plus sign ensures high measurement accuracy. Each channel provides a maximum error of just 0.1 percent.
Overvoltage Protection and Durability
The input shunt resistors withstand up to 30 V d.c. without damage. A PTC resistor limits the current automatically during fault conditions. This robust design protects your investment from wiring mistakes. The module operates reliably in temperatures from 0 to +55 degrees Celsius.
Compatibility with Existing Infrastructure
This module integrates seamlessly with MTU units TU811, TU813, and TU831. It uses the standard S800 mechanics for simple rack mounting. The module communicates via the ModuleBus for efficient data transfer. Its compact dimensions of 45 mm width save valuable cabinet space.
Environmental Certifications and Compliance
The AI825 meets CE mark requirements and UL 61010 electrical safety standards. It complies with RoHS and WEEE directives for environmental responsibility. The unit handles pollution degree 2 environments according to IEC 60664-1. Corrosion protection meets the ISA-S71.04 G3 classification standard.
Theme D: Expert Technical Evaluation & Performance Review
Signal Accuracy and Temperature Stability
This module maintains exceptional precision across its full operating temperature range. The temperature drift stays below 47 ppm per degree Celsius for 0 to 10 V inputs. For current inputs, the drift reaches a maximum of 78 ppm per degree Celsius. These values ensure consistent performance in thermally unstable environments.
Noise Rejection Capabilities
The AI825 provides a common mode rejection ratio of 120 dB at 50 and 60 Hz. This performance eliminates electrical noise from motors and power lines effectively. The normal mode rejection exceeds 40 dB at 50 Hz and 55 dB at 60 Hz. Engineers can trust signal integrity even in electrically noisy plants.
Input Filtering and Update Speed
The input filter rise time reaches 115 ms for voltage inputs and 130 ms for current inputs. This filtering smooths out transient noise without sacrificing response time. The update cycle time remains under 10 ms for all channels simultaneously. This speed supports fast control loops and real-time monitoring applications.
Electrical Isolation and Safety Margins
Individual channel-to-channel isolation protects against voltage surges up to 1900 V d.c. The isolation between channels and ground withstands 3250 V d.c. This high dielectric strength ensures operator safety and equipment protection. The rated insulation voltage stands at 250 V for continuous operation.
Power Consumption and Thermal Management
The module consumes a typical power dissipation of only 2.5 watts. Maximum power dissipation reaches 3.2 watts under full load conditions. The +5 V ModuleBus current consumption averages 70 mA typically. This low power draw allows dense module placement without overheating concerns.
Logistics & Standard Packaging Details
- One ABB AI825 analog input module with article number 3BSE036456R1
- Standard anti-static packaging for safe transportation
- Product documentation and keying code DA included
- Express delivery shipping available via FedEx, UPS, and DHL
