TheAI893(3BSC690141R1) is a high-precision, 8-channel analog input module designed for the S800 I/O system, specifically engineered to interface with temperature sensors in hazardous environments. This module integrates Intrinsic Safety (Ex) protection directly into its hardware, allowing for the connection of RTD and Thermocouple sensors without the complexity or cost of external safety barriers. Each of its eight differential channels is optimized for high-resolution temperature data acquisition in mission-critical process automation.
Technical Specifications
Model Number:AI893(3BSC690141R1)
Input Type:RTD (2 or 3-wire) or Thermocouple (TC)
Channel Count:8 Differential Channels
Resolution:15 Bit + sign (High Precision)
Safety Rating:Intrinsically Safe (Ex Certified) for Hazardous Areas
Signal Configuration:Software configurable for specific sensor types
Isolation:1 group of 8 channels isolated from ground
Mechanical Platform:S800 I/O System
MTU Compatibility:Compatible with TU890 (Ex applications) and TU891 (Non-Ex)
Key Engineering Features
TheAI893(3BSC690141R1) offers versatile configuration options to suit diverse industrial thermal monitoring needs:
Cold Junction Compensation (CJC):In Thermocouple mode, Channel 8 can be dedicated to ambient temperature measurement via a 3-wire Pt100 sensor. This ensures high-accuracy readings for Channels 1–7. Alternatively, users may specify a fixed junction temperature via software parameters.
RTD Flexibility:Supports both 2-wire and 3-wire Resistance Temperature Detectors, providing compensation for lead-wire resistance in 3-wire setups.
General Use:If CJC is not required, Channel 8 functions as a standard input channel identical to Channels 1–7.
Integrated Protection:On-board intrinsic safety components eliminate the need for additional DIN-rail space for external barriers, reducing overall cabinet footprint.
