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SPECIFICATIONS:
Part Number: IC3600SSZB1C
Manufacturer: General Electric
Series: Mark I & II
Product Type: Servo Valve Control Card
Number of Jumper Pins: 8
Feedback Signal: 0�10 V DC
Input Signal: 0�10 V DC
Power Supply Voltage: 28 V dc
Technology: Surface Mount
Power Supply: +24 V DC
Output: Drive signal
Operating Temperature: -40 to +70�C
Size: 15.9 cm high x 17.8 cm wide
Weight: 0.5 kg
Repair Time: 3-7 Days
Availability: In Stock
Country of Origin: United States
FUNCTIONAL DESCRIPTION:
IC3600SSZB1C is a Servo Valve Control Card manufactured and designed by General Electric as part of the Mark I & II Series used in GE Speedtronic Turbine Control Systems. The card contains a Pulse Rate to Analog (PR/A) converter that receives an alternating signal from the speed sensor at Input IN and provides a voltage-proportional output at Output N. This speed feedback signal is summed with the reference signal and other inputs to modulate NVCE, achieving the desired speed and/or load. Jumpers on the FA, PC, and FD programs the PR/A converter to provide the appropriate voltage for different machine speeds. An overspeed test pushbutton feeds a negative bias into W and increases NVCE for overspeed testing, with jumpers between pins CA, CB, CC, and pins CG, CF, CE, or CD used to select the desired transfer function. Potentiometer R114 allows gain adjustment, while inputs SPA and SPB accept digital setpoint signals SPA for 0.2 V DSP 1% change in speed, and SPB for 1 V DSP 1% change. A differentiator circuit monitors the speed feedback signal N and modulates VCE to limit turbine acceleration, with the output AC indicating when acceleration control is active; connecting HR and ACOM sets the acceleration control rate.
THERMOCOUPLE PROCESSING MODULE:
The Thermocouple Processing Module consists of two STKJ cards and one SGDE card. Its inputs are two signals, each representing the average of six of the twelve chromel�alumel thermocouples mounted in the turbine exhaust duct. These averaged thermocouple signals are cold junction compensated and amplified on the STKJ cards to provide two voltage signals proportional to the exhaust duct temperature. The voltage signals, TA and TB, are fed to the SGDE cards for overtemperature protection and to the STKJ cards for temperature control. The SGDE card also provides a fault signal in the event of thermocouple ground detection.
SPEED SENSORS:
The speed sensor cards receive analog NHP and NLR signals from the pR/A converter on the SSZB cards, and frequency inputs from magnetic pickups. These sensor cards provide logic signals to indicate that the turbine shaft, or other rotation device, has reached a certain speed. This card contains a pulse rate to analog (PR/A) Converter which receives an alternating signal at input IN and provides a 0 to 11 volt signal at output N. This speed feedback signal is summed with the reference signal and other signals to modulate NvCE to obtain the desired speed and/or load. Jumpers are made on FA, FB, FC, and FD to program the PR/A converter to give the appropriate voltage for various speed machines.
A fuel splitter is provided for systems that use both gas and liquid fuel. The turbine control specification and control elementary diagram define the specific type of fuel splitter used on a particular system. The fuel splitter allows transfer from one type of fuel to another without interrupting turbine operation and receives its commands from a panel-mounted selector switch. A wide transition period is available when changing from full gas to full liquid or from full liquid to gas, and the fuel mixture can be stopped at any proportion while in local control. The fuel splitter consists of SFKD and VRCC cards, with the VRCC card discussed in the Digital Setpoint section, while the SFKD card will be covered here.
WOC offers the largest stock of OEM replacement parts for GE Speedtronic Control Systems, providing quick access to new, unused, and fully rebuilt boards, all backed by a reliable warranty. We also repair faulty boards to extend their life and minimize downtime. Our team of automation experts is available 24/7 to provide technical support and assist with all your system requirements. For pricing, availability, or repair inquiries, contact us by phone or email to ensure your GE Speedtronic systems remain fully operational.
What is a Servo Valve Control Card?
The Servo Valve Control Card is an electronic module that converts a command signal into a proportional output to control a servo valve. It uses feedback from a position transducer to maintain precise valve positioning. This enables accurate and responsive control of hydraulic or pneumatic actuators.
What are the input and output signal ranges?
The input command and feedback signals typically range from 0 to 10 V DC. The output is either a voltage or current signal, depending on the actuator type. This allows the card to operate with various types of valves and actuators.
How is the card calibrated for precise control?
Calibration involves setting the gain potentiometer, verifying the input command and feedback scaling, and adjusting jumper configurations. A reference input signal is applied, and the output is measured to ensure the valve position matches the command. Proper calibration ensures accuracy and stable operation.
What happens if the feedback signal is lost?
If the feedback signal is lost or out of range, the card detects a fault condition. Output may be disabled, and a fault LED or signal is triggered. This prevents uncontrolled valve movement and protects the actuator.
