Description
The LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31(also commonly referenced as 46S166131 REV 5)is a crucial electronic component,originally manufactured by Louis Allis,a well-respected name in industrial motor and drive systems,once part of the Litton Industries family.This board falls under the category of industrial control circuit boards,specifically designed to provide precision”firing”or gating signals for power semiconductors(such as SCRs or thyristors)within a larger power converter or motor drive system.It serves as the intelligent brain that dictates the exact timing and sequencing of power delivery to large industrial motors or electrical loads.
Application Scenarios
Imagine a colossal paper mill where massive rolls of paper are processed by large DC motors,or a steel rolling plant where heavy machinery demands precise speed and torque control.The heart of these operations often lies in powerful DC drives or large AC drive rectifier sections,which rely on thyristors(SCRs)or other power semiconductors to regulate the immense power flowing to the motors.If the existing”firing logic”board in one of these critical drives fails,the entire production line grinds to a halt,costing millions in lost output.Traditional replacements for such legacy systems can be scarce.This is precisely where the LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31(or 46S166131 REV 5)steps in as a vital component.By providing the exact,precisely timed control pulses to these power devices,it ensures smooth motor operation,accurate speed regulation,and efficient power conversion.This board directly addresses the pain point of maintaining and extending the operational life of high-value,long-serving industrial machinery,averting costly wholesale system upgrades and preserving critical production capabilities.
Parameter
Main Parameters
Value/Description
Product Model
46S1661-31/46S166131 REV 5
Manufacturer
Louis Allis(Litton Industries)
Product Category
Firing Logic Circuit Board/Power Control PCB
Function
Generates precisely timed firing pulses for power semiconductors
Application
Typically found in DC motor drives,SCR rectifiers,or power converters
Power Requirements
Operates on internal control voltages provided by the drive system
Signal Output
Gating signals(pulses)for SCRs,thyristors,or similar devices
Mounting Method
Card slot mounting within a larger drive chassis
Revision
REV 5(Indicates a specific design iteration of the board)
Condition
NEW(New Old Stock,unused and in original/factory condition)
System Compatibility
Designed for specific Louis Allis drive series(e.g.,Saber DC drives)
Export to Sheets
Technical Principles and Innovative Values
The LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31 is a testament to sophisticated control engineering,even for systems that might be considered”legacy”by today’s standards.Its core technical principles and enduring value stem from several key aspects:
Precision Firing Pulse Generation:At its heart,this board’s primary function is to generate extremely precise and synchronized firing pulses(Gating Signals)for power semiconductor devices like Silicon Controlled Rectifiers(SCRs)or thyristors.In a DC motor drive,for example,the exact timing of these pulses determines the output voltage,and thus the motor’s speed and torque.This precision is achieved through dedicated timing circuits(e.g.,Phase-Locked Loops or digital counters)that synchronize with the AC line voltage,ensuring stable and ripple-free power delivery even under varying load conditions.
Robust Analog/Digital Integration:The LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31 represents a blend of robust analog and digital circuitry.While handling timing for power electronics,it often incorporates robust analog signal conditioning for feedback(e.g.,current,voltage sensing)and protection mechanisms.The digital logic,likely implemented using discrete logic gates or early integrated circuits(ICs),ensures reliable state transitions and sequence control,vital for safe startup,shutdown,and fault handling within the drive system.This careful blend contributes to its resilience in noisy industrial environments.
Critical Role in Power Conversion:This board is not merely a signal generator;it’s the intelligent intermediary that translates high-level control commands(e.g.,speed setpoint from a Programmable Logic Controller(PLC)or Distributed Control System(DCS))into the precise low-level pulses required to control the vast amounts of power flowing through the drive’s power section.Without its accurate and reliable operation,the drive cannot function,and the motor remains uncontrolled.Its ability to maintain synchronization with the fluctuating AC line and adapt to various feedback signals is crucial for stable system performance.
Designed for Industrial Rigor:Like all Louis Allis equipment,the LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31 was built with industrial durability in mind.Its components are selected for their robustness,and the circuit board itself is often designed to withstand vibrations,temperature fluctuations,and electromagnetic interference(EMI)common in heavy industrial settings.This”built like a tank”approach ensures a long operational life,making it a valuable asset for maintaining existing infrastructure.
Application Cases and Industry Value
Case 1:Steel Rolling Mill Modernization vs.Maintenance
A legacy steel rolling mill relied on several massive Louis Allis DC drives,powered by the LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31 at their core,to control the precision and speed of their rolling stands.One day,a critical drive failed,tracing back to a malfunction in its firing logic board.The immediate options were a multi-million dollar full drive replacement and modernization,which would incur months of downtime,or finding a rare replacement board.By sourcing a NEW LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31,the mill was able to quickly swap out the faulty component.This avoided the massive capital expenditure and prolonged production halt,allowing them to restore full operational capacity within days,saving millions in lost production and significantly extending the lifespan of their otherwise functional legacy drive system.
Case 2:Paper Machine Drive System Reliability
In a paper manufacturing plant,the smooth operation of large paper machines is paramount,with various sections precisely synchronized by DC motor drives.A key drive responsible for the drying section started exhibiting erratic speed control,leading to paper breaks and inconsistent product quality.Diagnostics pointed to a degradation in the firing logic.Since the original manufacturer no longer produced the exact part,locating a reliable,new replacement was critical.By obtaining a LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S166131 REV 5,the plant’s maintenance team was able to restore the drive’s precise speed regulation.This ensured uninterrupted,high-quality paper production,eliminating costly downtime due to erratic speed control and safeguarding the consistency of their final product,demonstrating the immense value of maintaining legacy industrial assets.
Related Product Combination Solutions
Louis Allis Saber DC Drives:The most direct pairing,as the LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31 is a core component within these drives,controlling their power output.
SCR(Silicon Controlled Rectifier)Modules:These are the actual power devices that the LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31 sends firing pulses to,typically found in the drive’s power section.
Louis Allis Commutation Inductors/Transformers:Other critical power components within the drive system that work in conjunction with the regulated power output from the firing logic board.
Analog Input/Output(I/O)Modules:Boards that handle feedback signals(e.g.,motor speed,current)which the LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31 uses to adjust its firing pulses.
Louis Allis Drive Control Boards(Higher Level):Other printed circuit boards within the drive that provide overall control,speed references,and protection logic,interacting with the firing logic board.
Industrial Power Supplies(e.g.,24VDC):Provide the necessary control power for the LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31 and other low-voltage electronics within the drive.
Cooling Fans/Heatsinks:Essential for thermal management of the power semiconductors that the LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31 controls,ensuring stable operation.
Installation,Maintenance,and Full-Cycle Support
Installation preparation:Before installing the LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31(46S166131 REV 5),ensure that the main power to the drive cabinet is completely de-energized,locked out,and tagged out–safety is paramount.Carefully photograph or diagram existing wiring connections before removal,particularly if replacing an old board.Handle the new board with anti-static precautions(ESD wrist strap,static-dissipative mat)to prevent damage to sensitive electronic components.Verify that the physical mounting(card guides,connectors)is clean and free of debris,ensuring a secure and proper fit.Always consult the specific drive system’s service manual for detailed installation instructions and calibration procedures,as improper installation can damage the drive or lead to unsafe operation.
Maintenance suggestions:Routine maintenance for the LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31 itself is generally minimal once installed correctly,given its solid-state nature.The focus should be on the overall health of the drive system it controls.Regularly inspect the surrounding power components(SCRs,heatsinks)for signs of overheating or degradation.Ensure cooling fans(if present)are operational and airflow is unrestricted to prevent thermal stress on the board and other components.Periodically check terminal connections for tightness and cleanliness,as loose connections can cause intermittent faults.Diagnostic LEDs on the board(if available)should be monitored for status indications,aiding in early fault detection.Maintaining a clean,dry,and thermally stable environment within the drive cabinet will significantly extend the operational life of the LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31 and the entire system.
Product Assurance
At Shenzhen Changxin,we pride ourselves on being your trusted partner in industrial automation.When you choose the LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31(46S166131 REV 5)from us,you’re investing in guaranteed original manufacturer quality,particularly critical for”New Old Stock”components that are increasingly rare.We adhere to the highest standards of product verification,ensuring every unit leaving our facility meets stringent performance specifications,ready to seamlessly integrate into your critical legacy systems.Our commitment extends beyond the sale,encompassing comprehensive quality assurance and an unwavering dedication to customer satisfaction.We stand by the reliability and durability of this essential component in even the most demanding industrial environments.
Our promise at Shenzhen Changxin is to provide a complete lifecycle of support for your industrial control needs.From expert guidance during product selection—especially crucial for legacy components like the LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31—and detailed technical assistance for installation and commissioning,to proactive troubleshooting and efficient spare parts replacement,our seasoned engineers are at your service.We understand that minimized downtime is critical for your operations,particularly when maintaining high-value,long-serving machinery.By partnering with us,you gain access to a robust supply chain and specialized knowledge,ensuring your LOUIS ALLIS LITTON FIRING LOGIC CIRCUIT BOARD 46S1661-31 delivers consistent,high-performance results throughout its operational life.Our global service capabilities ensure seamless support,making us the reliable choice for your automation requirements,anywhere in the world.
Choose Shenzhen Changxin for worry-free after-sales service and high-quality products. We only cooperate with first-tier brand manufacturers in the industry. Our products are imported and comprehensive. We provide thoughtful pre-sales service, communicating multiple times with customers about product models, quality, prices, and delivery schedules to jointly confirm the solutions and address users’ concerns in advance. Business execution is in place, ensuring on-time delivery of ordered products and formulating a comprehensive delivery plan to guarantee the project schedule. We also assist users in handling acceptance procedures. Our after-sales service is impeccable. For any problems during the warranty period, we only replace, not repair. We never shirk responsibilities or pass the buck when encountering problems. Our service hotline is available 24/7: 18150087953 SOLEMN COMMITMENT 1. For all items, modules, and cards sold by our company, if any quality problems occur during normal use within the warranty period, we will provide free replacements without any excuse or delay. 2. For non-discontinued materials and equipment that are out of the warranty period, we only charge the cost of relevant accessories for quality problems. 3. For discontinued materials and equipment, we provide alternative models and equipment replacement process services. 4. For the materials and equipment purchased by customers, we offer lifetime free system software upgrades and provide relevant technical documents for free. 5. We regularly follow up on the usage of the materials purchased by customers and promptly solve any problems. 6. Our company’s hotline provides 24-hour service, and we will respond to customers’ questions within 1 hour. 7. For any other matters not covered, our company adheres to the attitude of “thoughtful service and full responsibility” and solves problems from the customer’s perspective in a practical way. With a serious and rigorous corporate style, we wholeheartedly serve every customer. The company mainly imports PLC modules, programmable controllers, servo control systems and DCS spare parts, such as: ABB, AB (Rockwell), GE (General Electric), Bentley, Honeywell, Emerson, Motorola, Invensys, Westinghouse, etc. The company has established close cooperative relations with many world-renowned PLC and DCS product maintenance service providers, and can directly purchase from abroad, providing equipment and spare parts from different countries and manufacturers. We supply directly from abroad, without middlemen, reducing the cost of use. There is really no middleman who can make a price difference! ! If you have any defects or need to import PLC, DCS spare parts, please contact our team, we will help you find reliable and high-quality products super quickly, while shortening the delivery time to ensure that your equipment can operate normally in the right environment. On time. Professionally provide: PLC programmable control system, distributed control system (DCS), safety instrument system (SIS), ESD system, vibration monitoring system, turbine compressor control system (CCS) and other PLC modules, various industrial control systems, system modules, CPU, IO module, DO module, AI module, DI module, network communication module, Ethernet module, motion controller, analog input module, analog output module, switch input module, switch output module, module redundancy, power supply module, relay output unit, relay input unit, processing unit. Products are widely used in: electricity, petroleum, mine hoisting, ports, heating, gas, water supply, sewage treatment, metallurgy, papermaking, textile, chemical industry, water conservancy and other modern industrial fields! ABB 5SHY3545L0010/3BHB013088R0001 MOTOROLA MVME2434 MOTOROLA MVME2432 A-B 81001-450-53-R ABB PNI800 WOODWARD 9907-164 NI PXIE-4145 ABB CI871K01 3BSE056797R1 MOTOROLA MVME5500-0161 MOTOROLA MVME5500-0163 EMERSON MVME55006E-0163 GE DS200DCFBG1BJB ABB PPD113B01-10-150000 ABB PM904F 3BDH001002R0001 MOTOROLA MVME2400 FOXBORO H92A0K9V0H00 PIONEER MAGNETICS PM36218B-10P-1-8PH-J GE IC698CPE040-JP EMERSON MVME7100 ABB HPC800K02 ABB SYN5202-0277 ABB HPC800K02（含HC800模块、CP800模块、底座） MOTOROLA MVME5500 MOTOROLA MVME55006E-0163R GE IS215UCVEM09B AMAT 0090-76110 VME PCB ABB 5SHX2645L0002/3HB012961R0001 ABB AO2000-LS25 ABB PM865K01 3BSE031151R1 ABB 5SHX1445H0001 3BHL000391P0101 3BHB003230R0101 5SXE05-0152 KONGSBERG DPS112 GE VMIVME-7750 ABB AO2000-LS25 TRICON 4352B ABB PFSK152 TRICONEX 3009 MOOG D136-001-007 SCANde INTELLISCANDE14-405NM SCANLAB
