ABB AI825 3BSE036456R1 Analog Input Module The ABB AI825 3BSE036456R1, also cataloged as the AI825 Analog Input Module, operates as...
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ABB AI825 3BSE036456R1 Analog Input Module
The ABB AI825 3BSE036456R1, also cataloged as the AI825 Analog Input Module, operates as a dedicated hardware component for bipolar current and voltage signal acquisition within ABB S800 I/O systems. The module provides 4 individually galvanic isolated input channels with selectable current or voltage measurement functions.
Hardware Specifications
Parameter
Specification
Model
AI825 3BSE036456R1
Brand
ABB
Product Type
Analog Input Module
Series
S800 I/O
Origin
Sweden
Weight
0.22 kg
Dimensions
45 mm W x 102 mm D x 119 mm H
Operating Temp
0 to +55 deg C
Power Consumption
Typ. 2.5 W, Max. 3.2 W
Article Number
3BSE036456R1
Signal Specification
-20 to +20 mA, 0(4) to 20 mA, -10 to +10 V, 0(2) to 10 V
Number of Channels
4
HART Support
No
SOE Support
No
Redundancy
No
High Integrity
No
Intrinsic Safety
No
Resolution
14 bit plus sign
Input Impedance
10 MOhm voltage input, 50 Ohm current input
Isolation
Individually isolated channel-to-channel and to circuit common
Under/Over Range
+/- 15%
Maximum Error
0.1%
Input Filter Rise Time
115 ms voltage input, 130 ms current input
Update Cycle Time
Less than 10 ms
Maximum Field Cable Length
600 m
CMRR
120 dB at 50 Hz and 60 Hz
NMRR
Greater than 40 dB at 50 Hz, greater than 55 dB at 60 Hz
ABB S800 I/O Backplane and Isolation Characteristics
The AI825 uses ABB S800 I/O architecture with ModuleBus power conversion from the 24 V supply. Each input channel maintains individual galvanic isolation, which separates field signals from adjacent channels and the internal circuit common.
The module supports direct current measurement inputs with overvoltage protection. The current input circuit uses a PTC resistor for current limitation, while the voltage input stage withstands up to 6.3 V input levels. Therefore, the module can process mixed field signals without external signal conditioning.
The S800 platform provides structured I/O density scaling through the ModuleBus interface. The AI825 supports deterministic communication between the I/O module and ABB controller platforms through the S800 I/O communication structure.
Frequently Asked Questions
Q: Does the AI825 support HART communication for smart field devices? A: No. The AI825 is a standard analog input module and does not provide HART protocol communication capability.
Q: Can each AI825 input channel be configured independently? A: Yes. Each of the 4 channels can operate as either a voltage input or a current input with individual galvanic isolation.
Q: What MTU units are compatible with the AI825 module? A: The AI825 supports TU811, TU813, and TU831 Module Termination Units with keying code DA.
Field Installation Guidelines
Install the AI825 module in an ABB S800 I/O station using the specified compatible MTU. Confirm the mechanical keying position before insertion to prevent incorrect module placement.
Connect field wiring according to the selected current or voltage input configuration. Keep analog signal cables separated from high voltage and high current conductors to reduce electrical interference.
Use proper cable shielding practices for analog signal lines. Connect shields according to the plant grounding standard and avoid creating unwanted ground loops.
Verify ModuleBus connections and 24 V power supply quality before system commissioning. Check front LED indicators for Fault, Run, and Warning status after installation.
