Description

DATX100‑3ASC25H208 Pulse Trigger Interface Board

Technical Specifications

• Product Model: DATX100, 3ASC25H208
• Brand: ABB
• Warranty: One Year
• Input Voltage: 24 VDC control logic supply; low‑voltage gate‑pulse input from main controller
• Operating Temperature: 0 °C to +60 °C
• Storage Temperature: -40 °C to +85 °C
• Response Time: <1 µs pulse‑propagation delay for thyristor firing commands
• Protection Class: IP00 (plug‑in PCB for cabinet rack‑mount only)
• Accuracy Class: Phase‑angle‑matched pulse‑trigger timing for high‑power converter control
• Output Frequency: Matches converter firing frequency up to 600 Hz
• Rated Current Range: Gate‑pulse drive current for thyristor‑gate circuits
• Communication Interface: Internal rack backplane connector; pulse‑transformer isolated gate‑drive output terminals
• Supported Protocols: Proprietary internal pulse bus for ABB UNITROL 5000 excitation systems
• Overload Capacity: Galvanic pulse‑transformer isolation; short‑circuit gate‑output protection; transient‑voltage suppression
• Dimensions: 220 mm × 100 mm × 30 mm

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Product Overview

The DATX100‑3ASC25H208 is a plug‑in pulse‑trigger interface board designed for ABB UNITROL 5000 generator excitation control systems. It receives low‑level firing‑pulse commands from the main control CPU, provides galvanic isolation via integrated pulse transformers, and delivers conditioned gate‑drive pulses to high‑power thyristor converter stacks. On‑board circuit diagnostics monitor pulse‑path integrity and thyristor‑gate circuit health, feeding fault status back to the excitation controller for alarm reporting.

This hardware addresses key excitation‑system challenges: reliable noise‑immune transfer of firing‑pulse signals between low‑voltage control logic and high‑power thyristor bridges, containment of power‑side faults to avoid damaging control‑circuit electronics, and drop‑in spare‑part compatibility for legacy UNITROL 5000 racks. Isolation barriers eliminate ground‑loop interference common in power‑plant cabinet environments. Power‑plant excitation engineers, generator‑retrofit technicians and site‑maintenance teams benefit most. It fits standard UNITROL 5000 rack slots, supports both simplex and redundant excitation‑control architectures, and restores thyristor‑firing functions for steam‑turbine, gas‑turbine and hydro‑generator excitation workflows.

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Key Application Notes

• Exclusively for ABB UNITROL 5000 excitation platforms; cannot operate as standalone firing‑control hardware
• Pulse‑transformer galvanic isolation separates low‑voltage control electronics from high‑power converter potential
• Reports gate‑circuit open‑circuit and short‑circuit faults to the main excitation controller for HMI alarm logging
• Conformal‑coated PCB assembly option available for cabinets with high‑humidity and airborne‑contaminant exposure
• Designed for control‑room cabinet‑mount installation; not for direct field hazardous‑area mounting
• Critical spare part for generator‑excitation retrofits and planned‑maintenance spare‑part inventories in power‑generation facilities