ABB DSAO120 Analog Output Board

The ABB DSAO120, also cataloged as the DSAO 120 Analog Output Board, operates as a dedicated hardware component for analog signal generation and field actuator driving within ABB MasterPiece and Advant Controller platforms.

Hardware Specifications

Backplane Bus Communication Velocity and Firmware Flash Compatibility

• Backplane Bus Velocity: Executes high-speed digital-to-analog conversions and backplane transfers, enabling low-latency updating of output signals across process control cycles.
• I/O Density Scaling: Consolidates multiple analog output channels onto a single board, scaling channel density within local subracks without expanding physical control enclosure dimensions.
• Firmware Flash Compatibility: Maintains output state retention and channel configuration synchronization across system CPU reboot cycles and firmware flash upgrades.

Frequently Asked Questions

Q: How is power supplied to the DSAO120 analog output board?

A: The board draws its operational logic power directly from the internal subrack backplane bus power lines.

Q: What physical weight profile applies to the DSAO120 unit?

A: The net module weight is 0.5 kg, with a total shipping weight of 1.5 kg.

Q: What installation precautions prevent field signal distortion on DSAO120 channels?

A: Analog output signal lines must use shielded twisted-pair cabling with single-point shield grounding at the subrack frame to suppress electromagnetic noise.

Field Installation Guidelines

• Insert the DSAO120 board into its assigned subrack slot, ensuring alignment with guide rails and engaging backplane connectors fully before tightening front locking screws.
• Connect analog field wiring using shielded cables, grounding the shield braid exclusively at the cabinet ground bus to avoid ground loops.
• Separate low-level analog output lines from high-voltage AC circuits and inductive switching loads in cable trunks.
• Verify that main rack protective earthing (PE) is grounded securely prior to applying system backplane power.