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IC3600SNCA1 - Nozzle Control Card is available in stock which ships the same day.
IC3600SNCA1 - Nozzle Control Card comes in UNUSED as well as REBUILT condition.
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TECHNICAL SPECIFICATIONS:
Part Number: IC3600SNCA1
Manufacturer: General Electric (GE)
Series: Speedtronic Mark I & Mark II
Functional Designation: Nozzle Control Card (SNCA)
Interface Pins: 51-Pin (Double-sided gold-plated edge connector)
Operating Temperature: 0 to 60 Degrees Celsius
Operating Humidity: 5% to 95% RH (Non-condensing)
Base Material: FR-4 Glass Epoxy
Circuit Architecture: Discrete Solid-State Analog
Component Technology: Through-hole legacy manufacturing
Potentiometer Count: 4 Variable Trimming Pots
Potentiometer Type: Multi-turn precision cermet linear
Active Semiconductors: 12 Bipolar Junction Transistors (BJTs)
Transistor Package: TO-92 standard half-circle resin
Operational Amplifiers: 3 High-stability linear op-amp ICs
Resistor Profile: Low-drift precision metal-film
Capacitor Profile: Metallized polyester film and radial electrolytic
Clamping Diodes: Multi-point discrete black blocking diodes (CR)
Control Loop Type: Closed-loop analog error correction
Output Drive Signal: Low-latency analog voltage/current
Mounting Orientation: Slide-in rack chassis vertical slot
Availability: In Stock
The IC3600SNCA1 is a Nozzle Control Card designed and manufactured by General Electric for the pioneer-era Mark I and Mark II Speedtronic gas turbine control panels. Operating as a critical processing node within the primitive analog hardware array, this board governs the actuation, positioning, and mechanical optimization loops of the variable turbine nozzle assemblies to regulate mass gas flow and maintain peak efficiency thresholds.
VARIABLE NOZZLE ACTUATION & AREA GOVERNING:
On early heavy-duty gas turbines (such as specific GE Frame architectures), managing the entry angle and restriction area of the gas stream into the turbine buckets is necessary for process efficiency and compressor protection. The Nozzle Control Card inputs positioning commands and calculates real-time area parameters. It reconciles the demand signals with physical sensor position feedback, outputting highly stable analog voltage drives to the hydraulic or pneumatic nozzle valve positioners.
HARDWIRED ALGORITHM EXECUTION:
The SNCA card executes its scaling, summing, and error-amplification routines using discrete, physical solid-state components. High-precision op-amps and an organized grid of bipolar transistors evaluate voltage differentials natively on the board, ensuring rapid loop execution speeds resistant to software latency or operating system corruption.
ONBOARD FIELD TRIMMING MATRIX:
The top edge of the Nozzle Control Card is populated with multi-turn adjustable trimming potentiometers. These components allow field technicians to physically dial in zero boundaries, full stroke limits (span tuning), and loop gain sensitivity parameters directly inside the cabinet panel while referencing unit-specific engineering schematic drawings.
BACKPLANE INTEGRATION & LIFE EXTENSION:
The board features an integrated double-sided gold-plated edge connector base that slides firmly into dedicated slots on the Mark I or Mark II rack housing backplane. This connection format protects raw input signals from high noise thresholds typical of power-generation floors. Because active OEM technical assistance for these legacy turbine panels has closed, maintaining certified replacement stock, such as the IC3600SNCA1 card, is crucial for preserving the daily operation of vintage turbine setups worldwide.
WHY BUY FROM WOC:
World of Controls is a specialized global authority in the lifecycle extension of legacy GE Mark I & II ecosystems, providing the IC3600SNCA1 in both UNUSED and REBUILT conditions to eliminate operational latency. Our legacy quality-assurance protocol involves extensive multi-point analog signal calibration modeling, transistor thermal load evaluation, edge contact resistance auditing, and static-safe custom protective shipping. By partnering with WOC, you secure reliable hardware solutions reinforced by 24/7 technical consultation and accelerated global logistics.
What is GE IC3600SNCA1?
The IC3600SNCA1 is a legacy Nozzle Control Card (SNCA) engineered by General Electric for the Speedtronic Mark I and Mark II gas turbine control series. It functions as an analog hardware processing card that regulates the position and area alignment of the variable second-stage turbine nozzles to optimize gas flow mechanics, manage compressor surge safety limits, and preserve overall plant performance.
How does the card execute loop calculations without an onboard microprocessor?
The card utilizes a hardwired analog calculation grid. Its three linear operational amplifiers perform high-speed summing, error scaling, and proportional-integral (PI) gain functions in real time. Discrete bipolar junction transistors (BJTs) are then used to amplify these low-level op-amp calculations into robust output currents capable of driving field linkages.
What are the risks of inspecting or removing the SNCA card while the panel is live?
This legacy card does not contain internal soft-start resistors or power-inrush clamping circuits. Removing or inserting the card while the backplane is energized can cause electrical arcing across the 51-pin gold connector, potentially destroying the onboard op-amps or creating false transient trips in adjacent protection cards. The chassis should always be powered down before handling.
Which components are most susceptible to aging on this vintage board?
While the FR-4 base material and TO-92 transistors are highly durable, the radial electrolytic and metallized polyester film capacitors face dielectric breakdown and value drift over long lifecycle exposures to high-temperature cabinet enclosures. During rebuilds, point-to-point equivalent series resistance (ESR) testing on these capacitor banks is vital.
How does the IC3600SNCA1 handle flyback voltage from inductive fields?
The board is populated with multi-point discrete black clamping and blocking diodes (designated with CR prefixes). These diodes act as transient voltage suppressors, routing flyback energy safely away from sensitive op-amp logic tracks when output circuits or external relays collapse inductively.
