ABB AI895 3BSC690086R1 Analog Input Module, 8-Channel 4-20mA HART for AC 800M DCS

Description

Product Introduction

Field transmitters with HART protocol are widely used in process plants for pressure, temperature, level and flow measurement. Ordinary analog input cards can only read 4-20mA current value without accessing HART diagnostic data, which limits predictive maintenance. The ABB AI895 (3BSC690086R1) is an 8-channel HART-enabled analog input module designed for the ABB AC 800M / 800xA DCS system. It receives 4–20 mA loop signals and supports bi-directional HART communication, allowing the DCS to not only collect process variables but also read transmitter status, device diagnostics, tag information and perform remote calibration. As a drop-in spare part, it helps process sites retain full HART functionality without replacing existing field smart transmitters.

3. Key Features & Benefits

8-channel isolated 4-20mA analog input with native HART support : Each channel works for standard current loop and HART digital communication -> Read process value and smart device diagnostic information in one card, support predictive maintenance.

Galvanic isolation per channel : Channel-to-channel isolation, protection against ground loop interference common in chemical, power and pulp & paper plants -> Reduce signal drift and fault risk.

Compatible with S800 I/O rack and TU89x terminal units : Matches TU891 / TU892 terminal blocks, hot-swap supported -> Replace the module during planned shutdown without cutting down the whole controller.

Configured via Control Builder M : Integrated function blocks for HART communication, no extra gateway hardware required -> Simple commissioning for instrument engineers.

Built-in wire break detection : Automatically identify open circuit of field transmitter loops, alarm to DCS in time -> Fast troubleshooting between proof tests.

4. Technical Specifications

5. Application Fields

Power Generation : Boiler and turbine auxiliary measurement, smart pressure / temperature transmitters with HART.

Chemical & Petrochemical : Reaction tank level, flow, pressure monitoring, HART instrument diagnostic management.

Pulp & Paper : Consistency, basis weight transmitters in paper machine control system.

Water & Wastewater : Smart flow meters, level transmitters for water treatment DCS.

6. FAQ

Q: What is ABB AI895 3BSC690086R1 used for? A: AI895 is an 8-channel HART analog input module for ABB S800 I/O. It collects 4-20mA signals from field smart transmitters and supports HART digital communication to get device diagnostics.

Q: What is the difference between AI895 and ordinary AI cards like AI810? A: AI895 supports HART protocol. Ordinary analog input modules only read 4-20mA analog value, without access to transmitter diagnostic data, tag and calibration information.

Q: Can AI895 be hot swapped? A: Yes. It supports hot swap on S800 I/O rack with matched TU89x terminal unit.

Q: Is ABB AI895 still in production? A: It belongs to legacy S800 I/O series. Available stock are refurbished and fully tested spare parts for existing 800xA system maintenance.

CTA

Request a quote for ABB AI895 3BSC690086R1. Please confirm your terminal unit model (TU891 or TU892). We will complete function test before shipment and provide test report.