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The ABB AI835 (3BSE008520R1) is an 8-channel analog input module designed for the S800 I/O system. This module is specifically engineered to interface with thermocouple and millivolt signals, providing high-precision data acquisition for industrial process control environments.
This module is widely utilized in distributed control systems (DCS) where accurate temperature monitoring and low-level signal processing are required. It is commonly deployed in power generation, oil and gas, and chemical processing plants to monitor process variables via thermocouple inputs.
| Model | AI835 |
| Part Number | 3BSE008520R1 |
| Manufacturer | ABB |
| Input Type | Thermocouple / mV |
| Channel Count | 8 |
| Weight | 0.32 kg |
What type of signals does the AI835 support?
The AI835 is specifically designed for thermocouple and millivolt (mV) analog inputs.
Is this module compatible with the S800 I/O series?
Yes, the 3BSE008520R1 is a standard component of the ABB S800 I/O system.

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