ABB 3BSE008516R1 Analog Input Module

Family: S800 I/O Series, System 800xA / AC800M DCS, 8-channel analog input module

Basic Information

Part No.: 3BSE008516R1

Short Model Name: AI810

Type: Analog Input, 8CH

Signal Types: 0(4)…20mA, 0…10V, configurable via software

Resolution: 12-bit, single-ended input

Hot swap supported, online configuration available

HS Code: 85389091

Compatible Terminal Units (TU series, mandatory)

TU810 / TU812 / TU814 / TU818 / TU830 / TU833 / TU835 / TU838 / TU850

Typical Applications

Transmitter signal acquisition: pressure, level, flow, temperature (4-20mA / 0-10V). Widely used in chemical, power, metallurgy process DCS.

Key Limitations

Single-ended input, differential input not supported; poorer common-mode noise rejection than differential AI modules (e.g. AI830)

Passive acquisition, no transmitter power supply from module itself. 2-wire transmitters require external 24V supply

On-board channel current limiting protection

Alternative & Compatibility Reference (Same Series)

Select according to signal requirements:

AI830 (differential type, superior noise immunity)

AI815 (HART version, supports HART protocol transmitters)

Troublshooting Guide

1. No reading: Verify terminal unit model, Profibus DP communication, and channel configuration (mA or V)
2. Fluctuating signal: Single-ended design. Priority check shield grounding; avoid routing alongside power cables
3. Module without fault alarm but fixed reading: Check transmitter power supply and loop continuity

A single AI810 has fixed 8 hardware channels. No jumper, software setting or accessory can expand one AI810 to more than 8 channels.

Two Valid Expansion Methods within S800 I/O System

1. Add extra AI810 or other AI modules in the series

S800 I/O is distributed bus I/O. Multiple I/O stations and multiple AI810/AI815/AI830 modules on one backplane can be connected to a Profibus DP bus. Each module works independently with 8 channels, configured separately in Control Builder, total channels are cumulative.

Example: 2 × AI810 = 16 analog input channels

Constraints: Profibus bus load, controller I/O capacity, available backplane slots

2. Replace with higher-density modules

Most standard S800 AI modules are 8-channel; no 16-channel analog input module available in S800 range.

For HART: AI815 (also 8CH, HART capable)

For high noise & long cable runs: AI830 (8CH differential)

❌ Not Recommended Workarounds

Signal splitter / signal shunt: One transmitter signal split into two AI channels. Readings are identical, no new measurement point, accuracy degraded. Not acceptable for formal DCS application.

TU terminal units are only for wiring, no channel expansion function, only signal transfer and isolation.

Supplementary Notes

Channel mode (mA / V) is changed only by software configuration, channel count remains unchanged. Hot swap and online configuration apply per module and cannot increase channel quantity.

Signals Supported by ABB AI810 (3BSE008516R1)

✅ Only 2 signal types, configurable per channel independently via software

1. 0(4)～20 mA (current signal, widely used for 2-wire transmitters)
2. 0～10 V (voltage signal)

Key Features

Input type: Single-ended, differential input not supported

Resolution: 12-bit

Passive module, cannot supply power to transmitters externally. 4-20mA 2-wire transmitters require external 24V DC supply

Does NOT support: RTD, TC thermocouple, resistance signal, HART

Each channel may be set to mA or V separately; mixed mA/V channels are allowed on one module

Model Comparison (S800 Same Series)

Differential, high noise immunity: AI830

HART support: AI815

RTD / Thermocouple: AI845, AI835

ABB S800 I/O Analog Input AI Module List (System 800xA / AC800M)

All support Profibus DP, hot swap and online configuration. TU terminal unit (MTU) is mandatory.

Supplementary Notes

1. Obsolete legacy models (seen in spare parts stock, not recommended for new projects)

AI801: Early 8CH AI, phased out

2. Terminal Unit Matching Summary

AI810 / AI815 / AI830: TU810/TU812/TU814/TU818/TU830/TU833/TU835/TU838

AI835A: TU831/TU832

AI845: TU844 / TU845

AI880 Safety Module: Dedicated TU880 terminal unit

3. Quick Selection Guide

Standard 4-20mA: AI810

Require HART: AI815

Long cable / heavy interference: AI830 differential

Thermocouple temperature measurement: AI835A

HART + redundancy: AI845

SIL safety loop: AI880

Intrinsically safe hazardous zone: AI890

Optional: ABB AC500 PLC AI Modules (for PLC, not 800xA DCS)

AI523: 16CH AI

AI531: 8CH RTD/TC

AI561: 8CH 4-20mA