ABB AO610 3BHT300008R1

AO610 3BHT300008R1 is a 16-channel analog output module of ABB S600 I/O series. It is used in conjunction with Advant OCS control system and Advant Controller 160 controller. The module has 12-bit conversion accuracy. Supports two standard industrial analog output signals: 0-20mA current and 0-10V voltage. All channels are uniformly grouped and isolated by optocouplers, effectively isolating the interference between the controller backplane and the on-site execution loop. AO610 falls under the WEEE small equipment category and is officially exempted from some RoHS control provisions. It is suitable for continuous process control scenarios in thermal power, chemical, metallurgical and other industries.

Product Function

1. Receives digital control commands from the controller and converts them into standard continuous analog signals to drive field actuators;

2. Outputs signals to regulate control valves, servo valves, and variable frequency drives, as well as to drive field display instruments;

3. Features grouped electrical isolation to block strong field interference and reverse surge impacts from reaching the main control backplane, thereby protecting the controller;

4. Supports multi-channel centralized output, allowing a single module to control 16 field regulation devices simultaneously and streamlining control cabinet I/O configuration.

Working Principle

The AO610 completes signal output through five major processes: backplane communication, digital-to-analog conversion, photoelectric isolation, power drive, and fault feedback. The entire working logic is stable in a closed loop. The first step is bus data interaction: After being inserted into the S600 rack, communication is established with the Advant Controller 160 through the backplane dedicated bus, and the digital adjustment setting values sent by the controller are continuously received to complete the data caching. 

Step 2, 12-bit DAC digital-to-analog conversion: Equipped with a high-precision DAC conversion chip, it converts discrete digital quantities into standard 0-20mA current or 0-10V voltage reference signals. The 12-bit resolution ensures the linearity of output regulation without step regulation deviation. 

Step 3: Grouped optocoupler isolation transmission: All output channels pass through the integrated optocoupler isolation unit uniformly, cutting off the electrical connection between the controller side and the field side, eliminating the potential difference interference caused by different grounding points, and resisting on-site surges and static electricity impacts. 

Step 4: Power amplification drive output: The isolated weak reference signal is amplified by the internal drive circuit of the AO610 and output to the on-site actuator to synchronously adjust the valve opening and motor speed in real time. 

Step 5: Fault status feedback: Real-time monitoring of the load status of each output channel. Once a short circuit, open circuit, or load overload is detected, a fault message is immediately generated and uploaded to the controller through the backplane. The corresponding channel alarm pops up on the upper monitoring screen, facilitating the quick location of the fault point by operation and maintenance personnel.

Application Cases

1: Thermal Power Plant Boiler DCS System

Large-scale thermal power plant boiler control cabinets utilize multiple AO610 modules. The AO610 channels connect to forced draft dampers, induced draft actuators, feedwater control valves, and attemperator spray valves. The Advant controller calculates and outputs digital commands based on furnace draft, steam drum level, and main steam temperature; the AO610 converts these into 4–20mA signals to drive valve positioners, stabilizing boiler combustion. The AO610’s optocoupler isolation blocks electromagnetic interference from fan variable frequency drives (VFDs), ensuring long-term, stable unit operation.

2: Petrochemical Catalytic Cracking Unit

The control system for a refinery's catalytic cracking unit employs a centralized arrangement of multiple AO610 modules. Their output channels interface with feedstock inlet valves, catalyst slide valves, and fractionator reflux control valves. Leveraging the AO610's high channel density, a single cabinet requires only a few modules to manage flow and pressure regulation across the entire unit. Its 12-bit high-precision output ensures accurate reaction ratios, preventing feedstock waste and product quality fluctuations.

3: Metallurgical Reheating Furnace Temperature Control System

Control cabinets for steel plant hot-rolling reheating furnaces are equipped with AO610 modules. These modules output signals to control gas regulation valves and cooling water actuators, stabilizing furnace temperature through continuous, fine adjustments to the gas supply. The AO610’s broad signal compatibility allows it to work with both current-type and voltage-type positioners without requiring additional signal conversion modules.

4: Industrial Water Treatment System

Sewage treatment and circulating water systems use AO610 modules to control chemical metering pumps, blowdown control valves, and aeration fan VFDs. The AO610 enables synchronized regulation of multiple water treatment units. Its built-in fault diagnostic function monitors chemical pump circuits in real-time for wire breaks, preventing uncontrolled chemical dosing that could lead to water quality standards being exceeded.

Recommended Products

DO880 3BSE028602R1

AI880A  3BSE039293R1

TU842 3BSE020850R1

TU844 3BSE021445R1

TY801 3BSE028112R1

TB807 3BSE008538R1

PP826A 3BSE042244R3

PP846 3BSE042238R1

PP846A 3BSE042238R2

AO610 3BHT300008R1

PM864AK01 3BSE018161R1

DSTF620

HC800

5SHX2645L0004 3BHL000389P0104

PM665 3BDS005799R1