ABB DSTYW121 3BSE007836R1 Voltage Transformer Unit

1. Basic Information

• Model: ABB DSTYW121
• Order Number / Part No.: 3BSE007836R1
• Brand: ABB
• Product Type: Voltage Transformer Unit
• Application Series: ABB Advant Master DCS, AC800PEC, Excitation Control System

2. Technical Specifications

• Dimensions: 225 × 121.5 × 50 mm
• Weight: 0.48 kg
• Operating Voltage: 220V
• Output Frequency: 100 Hz
• Processing Speed: 550 μs
• I/O Points: 24 points
• Warranty: 12 months
• RoHS Compliance: Exempt

3. Functions & Features

• Precise Voltage Conversion & Isolation
• Converts high-side voltage signals to low-level control signals with high accuracy and electrical isolation for system acquisition.
• Excitation Control & Voltage Feedback
•    Used in generator and synchronous motor excitation systems for closed-loop voltage monitoring and feedback, ensuring stable operation.
• Strong Anti-interference & Electrical Isolation
• Provides galvanic isolation between high-voltage power circuits and low-voltage control circuits, protecting CPU and control modules.
• Designed for harsh industrial environments with high EMC performance.
• Modular & Plug-and-play Design
• Standard I/O module format, hot-swappable, easy installation, maintenance and replacement
• Self-diagnosis & Status Monitoring
• Built-in fault detection, status indication and diagnostic functions for fast troubleshooting.

4. Typical Applications

• Power plants: Generator excitation systems, voltage monitoring
• Industrial automation: DCS / PLC system voltage measurement
• Power transmission: High-voltage inverters, soft starters
• Oil & gas, marine, cement: Power distribution and unit control

5. Mechanical & Installation

• Connection: Screw terminal block
• Mounting: DIN rail or cabinet backplane mounting
• Communication: Proprietary ABB internal bus (not for external Ethernet)

6. Notes

• Compatibility: Standard original type, no direct replacement; strictly use 3BSE007836R1
• Condition: New original / refurbished available
• Application: Suitable for ABB Advant Master, AC800PEC and excitation control systems