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TECHNICAL SPECIFICATIONS:
Part Number: IC3600LINA1B
Manufacturer: General Electric (GE)
Series: Speedtronic Mark I & II
Product Type: Light Indicator Circuit Board / Card
Number of LED Positions: 16 LEDs (standard array)
Interface: 51-Pin Edge Connector (Gold-plated contacts)
Onboard Capacitance: High-temp Aluminum Electrolytic
Resistive Network: Precision Metal Film
LED Housing: Rigid gray protective stabilization casing
Operating Temperature: -50 to 50 °C (-58 to 122 °F)
Circuit Type: Discrete Through-Hole / Double-Sided PCB
Repair: 3–7 Days
Availability: In Stock
Country of Origin: United States
FUNCTIONAL DESCRIPTION:
The IC3600LINA1B is a Light Indicator Card manufactured by General Electric as an integral part of the Speedtronic Mark I and Mark II control systems. This board is the primary visual interface for turbine status annunciation, responsible for providing real-time local feedback on turbine states, alarm conditions, and logic sequencing. It translates internal 5V or 24V DC logic signals from the Mark I/II backplane into visual indicators, allowing maintenance personnel to diagnose system behavior directly from the control cabinet. The board is designed for extreme environmental resilience, capable of maintaining reliable signaling in climates ranging from sub-zero pumping stations to high-heat power generation facilities.
VISUAL ANNUNCIATION ARCHITECTURE
The board typically features an array of 16 Light Emitting Diodes (LEDs) housed within a protective gray casing. Each diode is individually addressed through the 51-pin edge connector, representing specific system parameters such as Ready to Start, Overspeed, or Lube Oil Pressure Low. The through-hole wires for each diode are clearly polarity-marked (+ and -) to facilitate rapid component testing. This hardware-based annunciation ensures that critical status information remains available even if the digital communication links to a remote control room are compromised.
SIGNAL CONDITIONING & NOISE IMMUNITY
To prevent false triggering of indicator lamps due to electrical noise in the industrial environment, the Light Indicator Card incorporates dedicated signal conditioning. This includes aluminum electrolytic capacitors for DC rail smoothing and metal film resistors for precise current limiting. These discrete components ensure that the LEDs operate at a uniform brightness level and are protected from the transient voltage spikes common in large-scale rotating machinery environments. The card utilizes a double-sided PCB layout to optimize trace isolation and minimize electromagnetic interference (EMI).
MARK I & II SYSTEM INTEGRATION
The IC3600LINA1B interfaces with the Speedtronic rack via a standardized 51-pin edge connector. These pins allow the card to slide into a dedicated slot in the control rack, where it picks up both power and logic triggers from the system backplane. Because the Mark I and II systems were designed for maximum scalability, this card can be deployed in various configurations depending on whether the turbine is part of a combined-cycle power station or a remote marine propulsion drive. The board’s legacy through-hole design makes it a robust, serviceable component that continues to support turbines that have been in operation for over four decades.
WHY PURCHASE IC3600LINA1B FROM WOC?
World of Controls (WOC) is a premier supplier for the aging GE Speedtronic fleet, providing critical support for components that the original manufacturer may no longer actively inventory. We offer the IC3600LINA1B in both unused surplus and fully rebuilt conditions. Our refurbishment process involves replacing aging electrolytic capacitors with high-reliability modern equivalents and verifying the forward voltage and luminosity of every LED in the array. With a 3–7 day repair turnaround, worldwide logistics, and 24/7 technical support, WOC is the trusted partner for maintaining the operational life of your GE Mark I/II systems.
What is the GE IC3600LINA1B?
The IC3600LINA1B is a Light Indicator Card for GE Mark I and Mark II turbine control systems. It provides localized visual status and alarm annunciation by driving an array of LEDs based on logic inputs from the control backplane.
How does the card identify different status signals?
Signals are received through the 51-pin connector on the board's edge. Each pin is mapped to a specific logic point in the turbine's sequence. When a specific pin is energized, the corresponding LED illuminates to notify the operator of that specific condition.
Is the Light Indicator Card compatible with modern LED upgrades?
The board is already designed around LED technology (rather than incandescent bulbs), making it inherently compatible with modern indicators. During WOC's rebuilding process, we ensure all LEDs are matched for brightness and color consistency to maintain original HMI standards.
What are the primary failure modes for this indicator board?
The most common failures involve the degradation of the aluminum electrolytic filtering capacitors (like C4) and phantom lighting of LEDs caused by carbon tracking or moisture on the 51-pin connector. WOC addresses these by using specialized cleaning solvents and high-temperature capacitor replacements.
How is the board protected from vibration in marine or pumping applications?
The Light Indicator Card uses a rigid through-hole mounting strategy for its diodes and a protective gray housing that acts as a mechanical stabilizer for the LED array. This prevents lead fatigue and stops the LEDs from vibrating out of their positions during heavy-duty turbine operation.
