ABB DSBC 173A S100 I/O Bus Extender Module

The ABB DSBC 173A, also cataloged as the DSBC 173A Bus Extender Module, operates as a dedicated hardware component for bus extension and signal routing across S100 I/O Bus structures within ABB MasterPiece and Advant Controller platforms.

Hardware Specifications

Backplane Bus Communication Velocity and Firmware Flash Compatibility

• Backplane Bus Velocity: Drives high-speed serial and parallel signal repetition over extended S100 I/O bus cables, maintaining deterministic bus communication cycle timing between main controller racks and remote subracks.
• I/O Density Scaling: Enables multi-rack S100 expansion topologies, allowing system engineers to scale I/O channel capacity without sacrificing processing throughput.
• Firmware Flash Compatibility: Maintains hardware-level signal pass-through stability during system controller initialization and online firmware updates across connected subracks.

Frequently Asked Questions

Q: What legacy part numbers correspond to the DSBC 173A bus extender?

A: The DSBC 173A replaces legacy part number 57310001-KH and corresponds to current ordering code 3BSE019216R1.

Q: How is power supplied to the DSBC 173A module?

A: Operating power for the board logic and bus transceiver circuits is drawn directly from the internal subrack backplane power rails.

Q: What function does the DSBC 173A perform in an S100 I/O system?

A: It acts as an active physical layer interface to extend the S100 I/O backplane bus to additional rack enclosures.

Field Installation Guidelines

• Insert the DSBC 173A module into its designated S100 subrack slot, ensuring proper guide rail alignment before fully seating backplane bus connectors.
• Secure top and bottom panel retaining screws to guarantee continuous mechanical grounding to the rack chassis.
• Connect approved S100 bus extension cables to the front panel connectors, ensuring connector latches or screws are tightened to prevent signal dropouts.
• Route extension bus cables away from high-voltage AC lines and VFD motor drives to suppress electromagnetic noise coupling on communication lines.