Description
General Information
表格
| Item | Specification |
|---|---|
| Part Number | DSAO120A, 3BSE018293R1 |
| Manufacturer | ABB |
| Product Family | Advant Master DCS System |
| Product Type | Analog Output Eurocard Module |
| Installation | Plug‑in eurocard for Advant Master rack slot |
| Power Supply | Powered via rack backplane |
| Lifecycle Status | Obsolete / End‑of‑Life. OEM manufacturing discontinued. Only new‑old‑stock, refurbished and field‑pulled used maintenance spare parts available; no brand‑new factory‑built units can be ordered. |
| ESD Handling Requirement | Analog output drive electronics assembly; anti‑static wrist‑strap and anti‑static workstation required for installation and replacement operations. |
Electrical & Interface Specifications
- Backplane Interface: Gold‑plated eurocard edge connector, communicates with Advant Master rack internal control bus.
- Field Terminals: Screw‑type terminal blocks for analog actuator wiring.
- Channel Configuration: 8‑channel galvanically‑isolated analog output channels.
- Output Signal Types: Configurable 4‑20 mA / 0‑20 mA current output.
- Resolution: 12‑bit D/A conversion.
- Accuracy: ±0.2 % of full scale.
- Maximum Load: 500 Ω per channel for current output.
- Isolation: Reinforced galvanic isolation between field side and internal control logic circuit.
- On‑Board Circuitry: D/A conversion circuit, analog output conditioning circuit, module self‑diagnosis circuit, multi‑channel LED status indicators.
- Power Consumption: Typical 5.2 W.
- Operation Limitation: Cannot operate standalone. Must be installed inside Advant Master rack and work with matching CPU main‑board.
- Compatibility Matrix
‑ Compatible System: ABB Advant Master DCS
‑ Mounting: Standard eurocard slot of Advant Master rack
‑ Hot‑swap: Not supported; rack power shall be fully cut off before module replacement.
Environmental Specifications
表格
| Item | Value |
|---|---|
| Operating Temperature | ‑20 °C ~ +60 °C inside control cabinet |
| Storage / Transport Temperature | ‑40 °C ~ +85 °C for long‑term spare‑part preservation |
| Relative Humidity | 5 %‑95 % RH, non‑condensing; avoid condensation to prevent circuit corrosion. |
| Compliance Standard | CE certification, complies with industrial EMC requirements. |
| Protection Class | IP00 printed‑circuit assembly; used inside protected cabinet only. |
| Dimension | Standard Advant Master eurocard form‑factor |
| Net Weight | Approx. 0.41 kg |
| Vibration Resistance | Complies with IEC 60068‑2‑6 industrial cabinet vibration criteria. |
Main Functions
- DSAO120A (3BSE018293R1) is plug‑in analog output eurocard module for ABB Advant Master DCS system. It converts digital control commands from main controller into analog current signals for field actuators.
- Provides 8‑channel 4‑20mA / 0‑20mA current outputs, used to control valve positioners, variable‑speed drives and other process analog actuators. Each channel is galvanically isolated to suppress industrial‑site electromagnetic interference.
- Front‑panel LED indicators display module power supply, fault status for on‑site inspection and troubleshooting. Built‑in self‑diagnosis reports module abnormal status back to DCS host.
- Typical field failure symptoms
‑ No analog output signal to field actuator
‑ Output value drift or unstable signal
‑ Module communication failure with rack backplane bus
‑ Individual channel damage caused by field over‑voltage or short‑circuit
Common root causes: field actuator loop fault, over‑voltage surge damaging output channels, poor backplane‑connector contact, dust and moisture contamination on circuit board, component ageing.
- Pure maintenance‑oriented spare‑part component, only for repair and replacement of existing legacy Advant Master installations; not suitable for new‑project engineering deployment.
Typical Applications
- Spare‑part replacement for DSAO120A analog output module (3BSE018293R1) inside Advant Master rack.
- Troubleshooting scenarios: control valve positioner driving failure, analog output drifting, module bus‑communication breakdown.
- Preventive‑maintenance spare‑part inventory for power, chemical and pulp‑paper sites equipped with Advant Master DCS system.
- Hardware refurbishment for decommissioned Advant Master assemblies.
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