ABB DSAO120A (3BSE018293R1) 8‑Channel Analog Output Module for Advant OCS S100 I/O System
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ABB DSAO120A (3BSE018293R1) 8‑Channel Analog Output Module for Advant OCS S100 I/O System - Image 4

ABB DSAO120A (3BSE018293R1) 8‑Channel Analog Output Module for Advant OCS S100 I/O System

  1. DSAI130AV1 — 8‑Channel Analog Input Module
  2. DSDI120AV1 — 32‑Channel Digital Input Module (the previous item we finished)
  3. DSDO110AV1 — 32‑Channel Digital Output Board
  4. DSDI110AV1 — 16‑Channel Digital Input Module
  5. DSBC170AV1 — Bus Communication Interface Module
  6. DSDO120AV1 — High‑capacity Digital Output Module
  7. DSPC172AV1 — Advant Processor Controller
  8. DSSB140AV1 — System Backplane Unit
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Description

ABB DSAO120A (3BSE018293R1) 8‑Channel Analog Output Module for Advant OCS S100 I/O System

 

Product Introduction

The ABB DSAO120A, factory part number 3BSE018293R1, is a rack‑mounted 8‑channel analog output board belonging to the ABB Advant S100 I/O family. It converts digital control commands issued by the Advant OCS main controller into standard analog signals to modulate field actuators. Built with high‑precision DAC chips and low thermal drift circuit design, this module delivers stable continuous control signals for closed‑loop process regulation. It communicates with the controller via the dedicated S100 backplane bus and provides channel‑to‑system electrical isolation to suppress field noise. Widely used in legacy heavy process plants, it remains a critical spare part for maintenance, system retrofit and emergency replacement of aging Advant DCS racks.

 

Specific Application Information

  • Control valve modulation: Output 4‑20mA / 0‑10V signals to positioners of pneumatic and hydraulic regulating valves.
  • Variable speed drive control: Send analog setpoint signals to VFDs for pump, fan and conveyor speed adjustment.
  • Actuator positioning: Provide continuous command signals for electric actuators and dampers.
  • Process closed‑loop regulation: Cooperate with analog input modules to implement flow, pressure, liquid level and temperature PID control.
  • Field instrument setpoint assignment: Send remote setpoint values to local transmitters and analyzers.
  • Generator auxiliary regulation: Deliver analog control outputs for boiler water feed and steam pressure loops in power plants.

DSAO120A

Technical Parameters

Parameter Specification
Model DSAO120A
ABB Part No. 3BSE018293R1
Channel Count 8 independent analog output channels
Signal Ranges Configurable: 4‑20mA, 0‑20mA, 0‑10V DC
Resolution 12 bit
Accuracy ±0.1% Full Scale at 25°C
Isolation 500V AC channel‑to‑system isolation
Backplane Power 24 V DC
Operating Temperature -25°C ~ +60°C
Compatibility Platform ABB Advant OCS / S100 I/O rack
Installation Plug‑in rack mounting
Approx. Weight 0.34 kg
Origin Sweden

 

Main Features

✅ 8‑channel high‑density analog output: Multiple modulating control signals integrated in one single board to reduce cabinet slot occupation. ✅ Multi‑range software configuration: Switch between current and voltage output modes via Advant engineering software without hardware modification. ✅ Electrical isolation protection: Isolates field‑side surges and ground loop interference to protect the main controller. ✅ Built‑in channel diagnostics: Detect output open circuit, overcurrent and module communication faults for fast troubleshooting. ✅ Low thermal drift design: Maintain high control accuracy under long‑time continuous operation and temperature fluctuation. ✅ Native S100 bus protocol: Direct data exchange with Advant OCS controller, no external signal converter required. ✅ Hot‑swap capability: Module replacement without shutting down the whole control rack to cut plant downtime. ✅ Industrial rugged PCB: Reinforced hardware suitable for dusty, high‑vibration heavy‑industry control rooms.

 

Application Scenarios

  1. Thermal Power Plants: Boiler feedwater, steam pressure and furnace draft regulating loop control.
  2. Pulp & Paper Industry: Pulping process flow control and paper machine actuator modulation.
  3. Metallurgical Plants: Smelting furnace temperature regulation and material feeding control.
  4. Chemical Process Plants: Continuous production line flow, level and pressure closed‑loop control.
  5. Mining Mineral Processing: Flotation reagent dosing control and thickener level regulation.
  6. Water & Wastewater Treatment: Chemical dosing pump speed control and outlet valve modulation.

 

Supporting Components

  • ABB Advant S100 system rack & backplane
  • Advant OCS main processor unit
  • Rack 24VDC power supply module
  • Analog signal terminal base and terminal blocks
  • Shielded twisted‑pair field signal cables
  • Advant engineering & diagnostic software package
  • Module mounting connectors
  • Spare housing and replacement accessories

DSAO120A

Related Series Models (ABB Advant I/O Family, 8 Models)

  1. DSAI130AV1 — 8‑Channel Analog Input Module
  2. DSDI120AV1 — 32‑Channel Digital Input Module (the previous item we finished)
  3. DSDO110AV1 — 32‑Channel Digital Output Board
  4. DSDI110AV1 — 16‑Channel Digital Input Module
  5. DSBC170AV1 — Bus Communication Interface Module
  6. DSDO120AV1 — High‑capacity Digital Output Module
  7. DSPC172AV1 — Advant Processor Controller
  8. DSSB140AV1 — System Backplane Unit

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