Siemens 6DD2920-0BB0 Circuit Board Full Product Introduction
Overview
Siemens 6DD2920-0BB0, also named LES1 interface circuit board, belongs to the 6DD2920 component series under SIMADYN D control system and fits SAV1, SAV21 and SAV22 module carrier racks. 6DD2920-0BB0 serves as core signal transfer hardware, delivering isolated transmission of pulse signals and status feedback signals between power units and main control hardware to build reliable signal links for high-power converter drive equipment. For upgrade projects of legacy electric drive facilities, 6DD2920-0BB0 acts as an indispensable signal interface carrier within the whole control loop. Equipped with standardized backplane slot design, 6DD2920-0BB0 can be mounted rapidly into system racks to complete conditioning and distribution of multi-channel trigger signals and fault feedback signals on site.
Technical Specifications
Model: 6DD2920-0BB0
Module Name: LES1 Interface Circuit Board
Applicable System: SIMADYN D
Compatible Carrier Rack: SAV1, SAV21, SAV22 Module Carrier
Power Supply: 24 V DC
Cooling Method: Natural Convection Air Cooling
Protection Class: IP20 (For cabinet internal installation only)
Operating Ambient Temperature: 0℃ ~ +60℃
Storage Temperature: -40℃ ~ +85℃
Signal Isolation Withstand Voltage: 1500 V AC
Installation Mode: Standard Rack Plug-in Type
Supported Signal Types: Trigger drive signals, equipment status feedback signals
Power Consumption: Approx. 2.5 W
Weight: Approx. 0.5 kg
Core Functional Advantages
6DD2920-0BB0 supports synchronous conditioning of multiple signal channels and provides electrical isolation to stop interference spreading from power circuits, preventing main control units from misoperation. Onboard signal filtering circuits enable stable operation under complex electromagnetic conditions on high-power drive working sites. The modular plug-in structure supports disassembly under system shutdown status to shorten maintenance duration. Integrated hardware status monitoring circuit collects fault data from power units and uploads information to SIMADYN D processors. 6DD2920-0BB0 maintains high precision for signal timing, ensuring synchronous triggering of thyristor and GTO power devices to sustain stable running of drive systems.
Product Features
Adopts multi-layer industrial PCB layout, featuring vibration resistance and wide temperature adaptability to satisfy working conditions in metallurgy and power generation sectors.
Built-in passive filtering and isolation circuits, reducing demands for external signal conditioning components.
Standard Euro-style connectors separate backplane system terminals and field wiring terminals for convenient circuit inspection.
No internal adjustable potentiometers, lowering risks of parameter drift and improving long-term operational stability.
Fully compatible with the complete SIMADYN D hardware framework; extra adapter boards are unnecessary to integrate into existing control systems.
Independent protection design for each channel; abnormal signals on single channel cannot interrupt operation of other channels on 6DD2920-0BB0.
Application Fields
High-power DC drive systems, rolling mill drive control systems, hydropower excitation regulation equipment, thermal power auxiliary frequency conversion control, railway traction converter equipment, large fan drive assemblies, high-power motor drive equipment for chemical industry, upgrade and reconstruction projects of outdated SIMADYN D automation systems.
Operation Guide
1. Confirm full power-off of the entire SIMADYN D control system and release residual voltage inside circuit loops.
2. Align 6DD2920-0BB0 with slots of SAV1/SAV21/SAV22 carrier rack, insert smoothly and lock the side buckles firmly.
3. Distinguish backplane system connectors and front field signal terminals, connect trigger output cables and status feedback cables strictly following engineering drawings.
4. Verify cable definitions strictly. Avoid mixing strong-current and weak-current wiring to prevent high voltage damage to signal channels of 6DD2920-0BB0.
5. Visually inspect circuit boards for short circuits and loose connections before power supply, then power on step by step.
6. Read channel status data via SIMADYN D commissioning software and confirm all feedback signals work normally.
7. Carry out load trial operation, continuously monitor trigger timing and fault feedback loops, and record operational data.
Working Principle
Main control processors send control pulse signals, which transmit to 6DD2920-0BB0 via the backplane. After isolation, filtering and level conversion inside the hardware, signals are exported to trigger terminals of power devices. Meanwhile, operational status signals and fault feedback signals generated by power units transmit into 6DD2920-0BB0. After signal shaping and isolation processing, data is sent back to SIMADYN D main control boards. 6DD2920-0BB0 builds an electrical isolation barrier between control loops and main power loops, eliminating ground loop interference and guaranteeing synchronous control timing. Once channel abnormalities occur, independent protection circuits restrict fault diffusion.
Comparison with Other Siemens Products
6DD2920-0BB0: LES1 interface board matched with SAV series carriers, focuses on processing trigger signals and status feedback signals of power devices.
6DD2920-0AB0: SE48 grid-side converter interface board, mainly used for grid signal collection.
6DD2920-0AH0: SAV21 thyristor trigger monitoring board, specialized in monitoring thyristor circuits.
6DD2920-0AL0: Trigger monitoring logic board, only executes logic operation without multi-channel signal isolation function.
Conclusion: 6DD2920-0BB0 is equipped with more channels and supports both signal output and feedback collection, suitable for complete high-power drive projects with multiple branches. Other models carry single functions, match specific converter topologies only and cannot replace 6DD2920-0BB0 directly.
Matching Product Models
6DD1600-0BA2 CPU551 Processor Module
6DD2920-0AH0 SAV21 Trigger Monitoring Module
6DD2920-0BA0 SAV1 GTO Trigger Monitoring Board
6DD1610-0AH4 MC500 Memory Card
6DD2920-0AC0 ELE1 Optical Transmitter Module
6DD2920-0AD0 ELR1 Optical Receiver Module
Our Supply Advantages
Ready stock of 6DD2920-0BB0 is available to support quick inspection and global shipment. Pre-delivery continuity testing can be provided to reduce risks of on-site failure after installation. Our team is familiar with spare parts matching solutions for full SIMADYN D systems and can supply supporting modules in one stop. Long-term spare parts reservation service is available to guarantee stable delivery cycles. Professional technical staff help clients verify rack compatibility and key wiring points. We provide after-sales technical consultation to guide troubleshooting and system commissioning related to 6DD2920-0BB0.
FAQ
Q1: Can 6DD2920-0BB0 directly replace 6DD2920-0BA0?
A1: No. The signal definition and terminal layout of the two circuit boards are completely different. Direct hardware replacement requires modifications to control programs and external wiring.
Q2: Which carrier racks support 6DD2920-0BB0?
A2: 6DD2920-0BB0 is standard compatible with SAV1, SAV21 and SAV22 module carrier racks. Installation is not feasible for other carriers.
Q3: No feedback signal after powering up 6DD2920-0BB0, which positions should be checked first?
A3: Check 24V DC supply voltage first, then inspect contact status of backplane connectors, verify external feedback wiring, and finally test components inside signal channels of the circuit board.
Q4: Is hot swapping allowed for 6DD2920-0BB0?
A4: Hot plugging is strictly prohibited. Live insertion may burn backplane bus and internal signal circuits of 6DD2920-0BB0.
Q5: Does 6DD2920-0BB0 support PROFIBUS communication?
A5: 6DD2920-0BB0 only processes pulse trigger signals and status feedback signals. PROFIBUS interface is not integrated. Communication functions require separate dedicated communication modules.
Q6: Can 6DD2920-0BB0 be adopted for metallurgical rolling mill drive reconstruction?
A6: Yes. SIMADYN D rolling mill drive architecture natively supports 6DD2920-0BB0, which is ideal for reconstruction of control loops on legacy DC rolling mill equipment.
Q7: How to eliminate interference-induced false alarms on signal channels of 6DD2920-0BB0?
A7: Check grounding of cable shielding layers, separate wiring of strong and weak current cables, and install filter devices for the power supply of 6DD2920-0BB0.
Q8: Which commissioning software works with 6DD2920-0BB0?
A8: STRUC G, the dedicated commissioning software for SIMADYN D, is used for signal monitoring and timing adjustment.
Recommended Siemens Series Models
6DD2920-0AB0,SE48 Mains-Side Interface Module
6DD2920-0AB1,SE48.1 Mains-Side Interface Module
6DD2920-0AC0,ELE1 Optical Transmitter Module
6DD2920-0AD0,ELR1 Optical Receiver Module
6DD2920-0AH0,SAV21 Thyristor Trigger Monitoring Module
6DD2920-0AJ0,SAV22 Thyristor Trigger Monitoring Module
6DD2920-0AL0,AUL2 Trigger Logic Monitoring Module
6DD2920-0BA0,SAV1 GTO Trigger Monitoring Board
6DD1600-0BA2,CPU551 Processor Module
6DD1610-0AH4,MC500 Flash Memory Card
6DD1660-0BB0,CS12 Fiber Communication Module
6DD2920-0AP0,Serial Interface Module
6DD1602-0AE0,Analog Input Module
6DD1606-3AC0,Digital Output Module
Technical Document Remarks
Hardware reference materials originate from SIMADYN D Hardware Manual. All wiring standards and channel definitions must comply with official drawing documents related to 6DD2920-0BB0. Actual operating conditions cannot exceed temperature ranges specified in official documents. Storage environments should avoid high humidity, heavy dust and corrosive gas.
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