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Description
ABB AI845 Analog Input Redundant Module
The ABB AI845 3BSE023675R1, also cataloged as the AI845 Analog Input Redundant Module, operates as a dedicated hardware component for analog current and voltage signal acquisition within ABB System 800xA control platforms. The module processes 8 single-ended channels and supports HART communication for field transmitter data exchange.
Hardware Specifications
Parameter
Specification
Model
AI845 3BSE023675R1
Brand
ABB
Module Type
Analog Input S/R HART Module
System Platform
ABB System 800xA / S800 I/O
Origin
Sweden
Weight
Approximately 0.23 kg
Dimensions
45 x 102 x 119 mm
Number of Channels
8 single-ended analog input channels
Input Signal Range
0(4)-20 mA, 0(1)-5 V
Resolution
12-bit
Communication Protocol
HART protocol support
Transmitter Supply
Current-limited transmitter power distribution
Diagnostics
Integrated module diagnostics
Backplane Communication and I/O Configuration
The AI845 module operates as an ABB S800 I/O analog input component with integration through the controller backplane communication system. The module supports I/O density scaling through multiple channel configurations while maintaining standardized analog signal processing.
Furthermore, the HART communication interface allows digital field device information to transfer together with the analog measurement signal. The module can process transmitter variables and diagnostic data from compatible HART-enabled instruments.
The module design supports ABB industrial control architectures using structured I/O configuration, firmware compatibility management, and system-level diagnostic monitoring.
Frequently Asked Questions
Q: Does the ABB AI845 support HART communication on analog input channels? A: Yes. The AI845 supports HART communication for compatible field transmitters, allowing digital device information to be transferred with the analog input signal.
Q: How many analog input channels are available on the AI845 module? A: The AI845 provides 8 single-ended analog input channels for current and voltage measurement applications.
Q: What input signals can the AI845 process? A: The module accepts 0(4)-20 mA current signals and 0(1)-5 V voltage signals with 12-bit resolution.
Field Installation Guidelines
Install the AI845 module according to ABB S800 I/O system installation procedures. Verify that the module is correctly seated in the I/O carrier and that the backplane connection is fully engaged before system startup.
Use shielded signal cables for analog transmitter wiring where required by the installation environment. Connect cable shields according to the plant grounding standard to reduce electrical interference.
Separate analog signal wiring from high-voltage power cables and switching circuits. Confirm transmitter polarity, loop wiring, and channel configuration before applying field power.
Check module diagnostics after installation through the ABB control system engineering tools. Validate input values against the connected field transmitter output before placing the channel into operational service.
