S100 I/O Bus Extender | DSBC173A 3BSE005883R1 | ABB

Technical Specifications

The ABB DSBC173A 3BSE005883R1 is a bus extender for the S100 I/O Bus.The DSBC 173A belongs to the S100 I/O hardware range and is classified as a spare part. ABB lists the product under S100 I/O and I/O Modules for System 800xA, Advant OCS with Master Software, Advant OCS with MOD 300 Software, and Compact Product Suite. It is also listed under the I/O Modules category for MasterPiece 200 and 200/1.ABB's AC 800M hardware documentation identifies CI856 as the S100 I/O communication interface. The S100 I/O interface supports up to five I/O racks on one segment, with up to 20 I/O units per rack. The TP856 connection for the S100 I/O bus uses TK575/TK580 bus extension cables.

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Troubleshooting & Comissioning Checklist

Insertion Check: Ensure the board is completely seated into the backplane connectors and the top/bottom thumb screws or levers are securely locked.
Subrack Grounding: Verify the subrack has a solid, low-impedance ground strap connected directly to the primary cabinet functional ground.
Bus Termination: Check if active bus terminators (such as the DSTC 176 or equivalent) are properly deployed at the end of the physical bus chain as required by your topology.

Field Engineering Considerations

1ms Response Time Processing: The module features a rapid 1ms signal response time. For time-stamped sequence-of-events (SOE) tracking or critical safety interlocking routines, field engineering wiring layouts must ensure that field contact bounce or debounce configurations in the logic match this ultra-fast sampling capability.
High Isolation Voltages: The unit provides a 2500 V RMS electrical isolation barrier between the internal system logic and external field inputs. This prevents high-voltage spikes or grounding differentials in remote field junctions from migrating to the main AC450 controller.
Network Distance Limits: While the repeated bus signals can extend up to a 1,000-meter threshold, field cabling lengths must be tightly calculated. Exceeding recommended line lengths without proper signal regeneration directly increases bus latency and risks protocol frame dropouts.

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Technical FAQ

Q: Does the DSBC173A support redundant configurations?
A: Yes. The module supports dual-bus redundancy configuration. If a fault is detected on the primary communication link, it automatically switches to the backup link to prevent system downtime.

A: It is predominantly used in legacy and active process automation frameworks, including the Advant OCS (with Advant Controller 410/450) and can be adapted into complex network layouts alongside AC 800M controller hardware architectures.

A: The 2500 V RMS electrical isolation safeguards the broader control system from high-voltage spikes and cross-talk. This ensures reliable data integrity across harsh industrial floors prone to heavy electromagnetic interference (EMI).

Q: Do you supply brand-new, original parts or second-hand refurbished items?

A: Our stock consists of Original New items; all products undergo quality inspection to ensure they are fully functional.

Q: What guarantees are included with the shipment?
A: All items in stock are tested by engineers, packed in professional ESD packaging, and shipped via express logistics with a global delivery time of 24–48 hours.

Q: How long does global shipping take?
A: Stock items are typically dispatched within 24 hours. Shipments are sent via DHL or FedEx Express, taking approximately 3–5 days to reach Asia, 4–6 days to Europe and the Middle East, and usually arriving within a week in major industrial regions worldwide.

Q: If the model I need is not listed on the website, can I request a quote?
A: Yes. We hold over 200,000 SKUs of industrial spare parts in stock, and many long-tail models are not listed in full. You can send us an RFQ (Request for Quote) directly, and we will provide wholesale pricing promptly.

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