Quality AI835 3BSE008520R1 | ABB 8-Channel Thermocouple/mV Input Module factory

AI835 3BSE008520R1 | ABB 8-Channel Thermocouple/mV Input Module

Product Summary

ABB AI835 3BSE008520R1 8-channel thermocouple/mV input module for S800 I/O. Supports TC types B,C,E,J,K,N,R,S,T and -30 to +75 mV, 15-bit resolution, open-circuit detection, cold-junction compensation. IEC, UL, CE compliant. Ideal for temperature monitoring in chemical, power, oil & gas and process automation. Global export supply with documentation support.

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Product Description

Product Overview

The ABB AI835 (3BSE008520R1) is an 8-channel analog input module for ABB S800 I/O systems. It is designed for thermocouple and low-level mV signal measurement, converting field temperature and millivolt signals into digital data for PLC, DCS and process control applications.

This module supports multiple thermocouple types and per-channel configuration, making it suitable for temperature monitoring in chemical, power, oil and gas, water treatment and general process automation systems.

Key Features

8 differential analog input channels for thermocouple and mV signals
Supports TC types B, C, E, J, K, N, R, S, T
Linear mV input range: -30 mV to +75 mV
15-bit A/D resolution for accurate temperature measurement
Channel-level open-circuit detection for improved diagnostics
Cold-junction compensation support, with channel 8 configurable as CJ channel
Compatible with ABB S800 I/O termination units such as TU830, TU833, TU810, TU812 and TU814
Suitable for System 800xA, AC 800M and Freelance systems

Typical Applications

Furnace, reactor and pipeline temperature monitoring
Thermocouple signal acquisition for DCS and PLC systems
Process temperature measurement in chemical and petrochemical plants
Power generation and boiler temperature monitoring
HVAC and industrial heating system integration
S800 I/O system expansion, maintenance and spare-part replacement

Technical Specifications

Product Name	ABB AI835 Analog Input Module
Order Code	3BSE008520R1
Brand	ABB
Product Family	S800 I/O
Product Type	8-Channel Thermocouple/mV Input Module
Input Signals	Thermocouple B, C, E, J, K, N, R, S, T; -30 to +75 mV linear
Channels	8 differential inputs
Resolution	15-bit
Accuracy	Up to ±0.1% typical; verify per official datasheet
Isolation	Group isolation from system backplane; verify rated voltage per datasheet
Installation	S800 I/O rack / DIN-rail mounted with compatible TU/TB termination unit
Environment	IP20 typical for control cabinet installation

Note: Final accuracy, isolation voltage, update rate, cold-junction compensation method, power consumption and approved termination units should be confirmed with the official ABB datasheet or product label before installation.

Why Choose the ABB AI835?

Dedicated Thermocouple Input

Designed specifically for TC and low-level mV signals, reducing the need for external converters.

Flexible Channel Configuration

Each channel can be configured independently for different thermocouple types or mV ranges.

Built-in Diagnostics

Open-circuit detection and status indicators help identify field wiring issues quickly.

Proven S800 I/O Compatibility

Widely used in ABB System 800xA, AC 800M and Freelance automation projects.

Package Includes

1 × ABB AI835 Analog Input Module
Order code: 3BSE008520R1
Original packaging, if available
Standard export packing for safe delivery

Shipping & Support

We supply ABB S800 I/O modules for global industrial automation projects. Please contact our sales team with your required quantity, destination country, controller type and termination unit model. We can assist with product confirmation, lead time and available documentation.

Frequently Asked Questions

Is AI835 3BSE008520R1 the same as AI835A?

No. AI835 3BSE008520R1 and AI835A 3BSE051306R1 are different order codes. AI835A may support additional thermocouple types such as D, L and U. Always confirm compatibility with your system configuration before replacement.

Which termination units are supported?

AI835 can be used with S800 I/O termination units such as TU830, TU833, TU810, TU812 and TU814, depending on wiring requirements.

Can this module measure 4-20 mA signals?

No. AI835 is designed for thermocouple and mV signals. For 4-20 mA inputs, modules such as AI810 or AI830 family equivalents should be considered depending on the application.

Do you provide datasheets?

We can provide available product information upon request. For official specifications, always refer to the ABB datasheet or authorized documentation.

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