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IC3600SOSG1C - Overspeed Signal Generator Board is available in stock which ships the same day.
IC3600SOSG1C - Overspeed Signal Generator Board comes in UNUSED as well as REBUILT condition.
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TECHNICAL SPECIFICATIONS:
Part Number: IC3600SOSG1C
Manufacturer: General Electric (GE)
Series: Speedtronic Mark I & Mark II
Functional Designation: Overspeed Signal Generator Board (SOSG)
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 / Frequency-to-Voltage Converter
Component Technology: Through-hole legacy manufacturing
Potentiometer Count: 3 Variable Trimming Pots
Potentiometer Type: Multi-turn precision cermet linear
Active Semiconductors: 14 Bipolar Junction Transistors (BJTs)
Transistor Package: TO-92 standard half-circle resin
Operational Amplifiers: 2 High-stability linear op-amp ICs
Resistor Profile: Low-drift precision metal-film
Capacitor Profile: High-stability film and radial electrolytic decoupling caps
Clamping Diodes: Multi-point discrete black blocking diodes (CR)
Input Signal Interface: High-frequency pulse train from Magnetic Pickups (MPU)
Trip Logic Output: Discrete open/close relay drive signal
Mounting Orientation: Slide-in rack chassis vertical slot
Availability: In Stock
The IC3600SOSG1C is an Overspeed Signal Generator Board (SOSG) designed and manufactured by General Electric for the Mark I and Mark II Speedtronic turbine control networks. Functioning as a primary safety boundary within the legacy control rack, this board serves as an emergency tachometer watchdog, continuously computing turbine shaft velocities and executing rapid trip logic if mechanical shaft speeds exceed safe operational limits.
FREQUENCY-TO-VOLTAGE SIGNAL CONVERSION:
The SOSG card interfaces directly with raw AC pulse trains generated by engine-mounted Magnetic Pickups (MPUs) that monitor the gear wheel of the turbine shaft. The Overspeed Signal Generator Board processes these high-frequency inputs via an onboard frequency-to-voltage conversion matrix. This sub-circuit converts the raw sensor speed pulse frequencies into a highly proportional, smooth linear DC voltage loop suitable for analog hardware comparison.
EMERGENCY TRIP COMPARATOR LOGIC:
Once the frequency is scaled to a stable analog voltage, the card routes the signal to its onboard high-stability operational amplifier integrated circuits. Configured as a fast-acting voltage comparator, the circuit balances the live speed voltage against a highly stable internal reference voltage. If the turbine shaft accelerates past the critical overspeed setpoint, the comparator immediately shifts states, altering the bias of its discrete transistor switching grid.
HARDWIRED ALGORITHM INTERFACING:
The Overspeed Signal Generator Board relies entirely on its through-hole solid-state assembly to preserve sub-millisecond response loops. Three top-accessible multi-turn variable cermet potentiometers allow field engineers to tune the exact overspeed trip percentage point, filter out input noise spikes, and adjust reference balance offsets according to unit-specific mechanical blueprints. The gold edge-connector ensures low-impedance connection paths directly to central emergency trip master relays.
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 IC3600SOSG1C in both UNUSED and REBUILT conditions to eliminate operational latency. Our legacy quality-assurance protocol involves extensive multi-point analog signal calibration modeling, frequency-to-voltage slope testing, comparator trip point step-response checks, and static-safe custom protective packaging. By partnering with WOC, you secure reliable hardware solutions reinforced by 24/7 technical consultation and accelerated global logistics.
What is GE IC3600SOSG1C?
It is a legacy Overspeed Signal Generator Board (SOSG) developed by General Electric for Speedtronic Mark I and Mark II control frameworks. It serves as an independent analog safety card that monitors high-frequency pulse data from magnetic pickups, converting frequency to voltage to trigger an emergency turbine trip if an overspeed condition occurs.
Can an MPU circuit failure trigger a false overspeed trip on this board?
The card is designed with directional clamping diodes and filtering networks to interpret clean pulse waves. A total loss of MPU signal drops the input frequency to zero, which typically indicates a stopped shaft or failed sensor (resulting in a separate "loss of speed signal" alarm), whereas a trip requires an elevated analog voltage crossover.
Why is powering down the panel necessary before replacing the SOSG card?
The Overspeed Signal Generator Board does not feature built-in soft-start or active inrush current limiting. Inserting or pulling the card while the 51-pin backplane is hot can cause sudden voltage transients or arcs across edge tracks, which can ruin sensitive operational amplifier ICs or cause accidental emergency plant shutdowns.
How does this card interact with the main turbine trip solenoids?
The output state of the board's transistor matrix drives low-latency signals directly into master protection relay coils located within the Speedtronic cabinet panel. When the overspeed threshold is breached, the relays open, immediately de-energizing the main hydraulic fuel trip solenoids to stop the turbine.
