ABB
ABB 3BSE004939R1012 Trigger Board
In stock, ready to ship
Manufacturer: ABB
Product No.: 3BSE004939R1012
Product Type: Trigger Board
Product Origin: Sweden
Payment: T/T
Weight: 315g
Shipping port: Xiamen
Warranty: 12 months
Yes, we provide a 30-day money-back guarantee for all purchases.
Yes, all items come with a 12-month warranty from the date of shipment.
The ABB 3BSE004939R1012 (also designated as SDCS-PIN-48-SD) is a Pulse Transformer Board, commonly referred to as a Trigger Board. It is a critical component in ABB DCS800 DC Drives, responsible for managing the firing pulses of the thyristors in the power section.
Technical Specifications
| Feature | Details |
|---|---|
| Product ID | 3BSE004939R1012 |
| Type Designation | SDCS-PIN-48-SD (successor to 3BSE004939R0002 / SDCS-PIN-48) |
| Function | Galvanic isolation and pulse amplification for thyristor triggering |
| Compatibility | ABB DCS800 and older DCS series DC Drives |
| Net Weight | 0.328 kg |
| Operating Principles | High energy transfer, low leakage inductance, high-permeability ferrite core |
Key Roles in the Drive System
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Galvanic Isolation
Provides electrical separation (up to several kV) between the control electronics and the high-voltage power circuit, protecting sensitive processor electronics from high-voltage spikes. -
Pulse Shaping
Ensures the firing pulses sent to the thyristors have the correct rise time and width for reliable conduction. -
Simultaneous Driving
Contains multiple pulse transformers, allowing several thyristors to be driven simultaneously for phase synchronization.
Replacement & Compatibility Notes
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Direct Replacement: The R1012 version replaces the older, now obsolete 3BSE004939R0002 (SDCS-PIN-48).
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Safety Warning: This board is connected to the thyristor power bridge and carries lethal voltages. Always ensure the drive’s main circuit breaker is locked out and the DC bus is fully discharged before replacing the board.
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Inter-winding Capacitance: Designed to minimize inter-winding capacitance, reducing "droop" and "backswing" in trigger signals for smoother motor operation.