Product Identification
Item Description
Manufacturer ABB
Model RAO02
Article Number 2VAA008428R1
Product Type Redundant Analog Output Module
Product Family ABB Ability™ Symphony® Plus (S+), SD Series I/O
Signal Type Analog Output (AO)
Channels 16 channels
Redundancy Supported
HART Support HART v5.4
Mounting SD Series I/O base / DIN rail system

Functional Description

The ABB RAO02 is a 16-channel redundant analog output module designed for ABB Symphony Plus SD Series I/O systems. It provides reliable analog control outputs from the Symphony Plus controller to field devices, with support for redundant I/O architectures used in high-availability process control applications.

Typical applications include:

Control valve positioning
Variable frequency drive speed references
Damper and actuator control
Process regulator outputs
Turbine and power plant control loops
Critical process control applications requiring output redundancy
Key Features
Feature Specification
Output Channels 16 independently configurable channels
Output Signals 4–20 mA or 1–5 VDC
Isolation Group isolated analog outputs
HART Supports HART v5.4 instruments
D/A Resolution 12-bit
Accuracy ±0.1% full scale range
Redundancy Dual redundant communication capability
Diagnostics Status LEDs and module diagnostics

Technical Specifications
Analog Output
Parameter Value
Output Current Range 4–20 mA
Output Voltage Range 1–5 VDC
Number of D/A Converters One per output channel
Output Load (Current Mode) 0–750 Ω
Voltage Output Load ≥22 kΩ
Short Circuit Protection Current limited protection
Open Circuit Detection Less than 5 seconds

HART Communication

The RAO02 supports HART-enabled field devices and allows additional HART secondary variables to be transferred into the control system.

Typical uses:

Smart valve diagnostics
Position feedback monitoring
Device status information
Additional process variables

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