ABB AI893 3BSC690141R1 S800 Analog Input Module
Manufacturer: ABB
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Part Number: AI893 3BSC690141R1
Condition：New with Original Package
Product Type: Analog Input Modules
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Country of Origin: Sweden
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
ABB AI893 3BSC690141R1 Analog Input Module
Configured for temperature sensor termination in S800 I/O networks, the ABB AI893 (AI893 Analog Input Module) provides direct physical/electrical execution. The module acts as an intrinsically safe 8-channel acquisition device designed to interface directly with RTD and thermocouple sensors situated in hazardous field areas.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | AI893 |
| Brand | ABB |
| Origin | Sweden |
| Weight | 0.3 kg |
| Dimensions | 119 x 45 x 102 mm |
| Operating Temp | -25 to +70 deg C |
| Power Consumption | Derived from backplane bus |
| Input Channels | 8 differential channels |
| Supported Sensors | Thermocouples and RTDs (2-wire or 3-wire) |
| Intrinsic Safety | Integrated (Ex i) per channel |
| Termination Units | TU890 (Ex) or TU891 (non-Ex) |
S800 Backplane Bus Communication and Deterministic Scaling
The module communicates with the cluster master via the S800 I/O backplane bus, transferring digitized temperature values with high-speed cycle times. To maintain high accuracy across its broad I/O density scaling configuration, the module's firmware flash compatibility enables dynamic channel diagnostic mapping. High-frequency digital filtering on each channel reduces signal distortion from electrical noise while maintaining rapid data conversion rates over the internal bus structure.
Frequently Asked Questions
Q: How is cold junction compensation (CJC) managed for thermocouple inputs on the AI893?
A: Channel 8 can be dedicated to local cold-junction measurement using a 3-wire Pt100 sensor connected to the MTU terminals, or configured for remote CJC, or set to a user-defined fixed junction temperature.
Q: Is hot-swapping of the AI893 module supported under power?
A: Yes, hot-swapping is supported on S800 I/O systems when utilizing compatible, active backplanes and termination units, allowing replacement without interrupting communications on adjacent active modules.
Field Installation Guidelines
- Mount the compatible Termination Unit (TU890 for Ex or TU891 for non-Ex) onto the DIN rail and verify ground connection stability before plugging in the active module.
- Align the AI893 module with the guide rails on the Termination Unit and push firmly until the locking mechanism engages completely.
- Route all intrinsically safe field cabling away from non-intrinsically safe cabling, maintaining the minimum 50 mm physical segregation required by industrial safety codes.
- Connect shield wires only to the designated ground terminals on the module termination base to prevent ground loops.