SPECIFICATIONS
Part No.: IS200VCCCH1A
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Input Supply: 125 vdc
Frame Rate: Upto 100Hz
Product Type: Contact Input/Relay Output Board
Availability: In Stock
Series: Mark VI
Functional Description
IS200VCCCH1A is a contact input/relay output board developed by GE. It is part of the Mark VI series. The VCCC board, associated with the daughterboard, is capable of accepting 48 discrete contact inputs and controlling 24 relay outputs. It connects to a total of four terminal boards, making it suitable for complex automation environments where a large number of field signals must be processed efficiently and reliably.
Features
- It is a double-width module, meaning it occupies two standard slots in a VME I/O rack. This installation format allows it to integrate seamlessly into the Mark VI control system’s modular architecture, which supports scalability, easy maintenance, and system flexibility.
- One of the key strengths lies in its relay output capabilities, which enable the board to control external devices such as actuators, solenoids, and alarms. At the same time, it efficiently processes a wide range of discrete inputs, which can include status signals from switches, sensors, and other field instruments. This makes the board crucial for real-time monitoring and control tasks in critical applications.
Contact Inputs
- The board supports up to 48 dry contact inputs, which are essential for monitoring the status of various field devices such as limit switches, interlocks, alarms, and status indicators. These inputs are split across two terminal boards for organized wiring and signal management. The first 24 contact inputs are connected to a dedicated contact input terminal board (TBCI), while a second terminal board is used to accommodate inputs 25 through 48.
- To power the dry contacts, the system provides DC excitation voltage, ensuring stable and reliable signal detection. The terminal boards are connected to the VCCC processor board in the VME I/O rack via cables with molded plugs, which not only simplify installation but also enhance connection reliability and minimize wiring errors.
- One of the standout features of the VCCC module is its high-speed input scanning and recording capability. The system is capable of scanning inputs at a 1 millisecond (ms) interval, allowing it to capture and process fast-changing signals in real time. This level of responsiveness is particularly valuable for critical turbine monitoring functions, where precise timing and immediate detection of events are crucial for system safety and performance.
- Additionally, the VCCC board is equipped with a Sequence of Events (SOE) recorder, which logs every contact closure and opening with a time resolution of 1 ms. This high-resolution event tracking supports accurate diagnostics and post-event analysis, enabling operators to understand exactly when and how an event occurred. The SOE system is also sensitive enough to detect contact chatter and pulse widths as short as 6 ms, ensuring even brief or intermittent signals are not overlooked.
Relay Outputs
- The relay output functionality of the board is implemented through the use of a TRLYH1B module, which holds twelve plug-in magnetic relays. These relays are responsible for switching external loads or providing status outputs based on commands from the control system. Their flexible configuration makes them suitable for a wide range of industrial applications, particularly within turbine and power plant control systems.
- The first six relay circuits (Relays 1–6) are jumper-configurable, allowing users to select between two operating modes depending on the application requirements. They can be set up either as dry Form-C contact outputs (commonly used for signaling and low-power switching applications), or configured to drive external solenoids—making them suitable for energizing mechanical devices such as fuel valves or actuators.
- For field solenoid applications, the system supports multiple power supply options, including 125 V DC, 115 V AC, or an optional 24 V DC source. Each relay output is protected with individually jumper-selectable fuses, ensuring circuit protection and isolating faults without affecting the entire system. Additionally, on-board suppression circuits are included to minimize electrical noise and protect against voltage spikes caused by inductive loads, thereby enhancing the reliability and longevity of connected devices.
- The next five relays (Relays 7–11) are provided as unpowered, isolated Form-C contacts. These are ideal for applications requiring electrical isolation between the control system and external devices, allowing them to interface with equipment operating at different voltage levels or grounding schemes.
- Relay 12 is a special-purpose output, also provided as an isolated Form-C contact. It is typically reserved for special applications, such as energizing ignition transformers or triggering safety mechanisms that require independent control paths or enhanced isolation.
Installation
- Power Down the VME I/O Processor Rack: Begin by safely shutting down the power to the VME I/O processor rack to prevent any electrical hazards or disruptions during installation.
- Insert the VCCC Board: Slide the board into the designated slot within the VME I/O processor rack. Use caution to align the board correctly with the slot.
- Secure Edge Connectors: Once the board is correctly positioned, use your hands to push the top and bottom levers, ensuring they firmly seat the edge connectors of the board. This step is crucial for establishing proper connections.
- Tighten Captive Screws: Securely fasten the captive screws located at the top and bottom of the board's front panel. These screws ensure that the board remains securely in place within the rack.
- Power Up the VME Rack and Check Diagnostics: Power on the VME rack after the successful installation. Verify the functionality and proper integration of the board by checking the diagnostic lights located at the top of the front panel. Ensure that the lights indicate normal operational status.
The WOC team is always available to help you with your Mark VI requirements. For more information, please contact WOC.
Frequently Asked Questions
What is IS200VCCCH1A?
It is a contact input/relay output board developed by GE under the Mark VI series.
What do the LEDs on the VCCC board signify?
Flashing green indicates normal operation (RUN), solid red denotes a failure (FAIL), and steady orange indicates a diagnostic alarm condition (STATUS).
What diagnostics are available for the module outputs?
VAOC Diagnostics Monitors output health by checking voltage drops and conducting high/low limit checks. A composite alarm, L3DIAG VCCC, triggers if any of the 48 outputs become unhealthy. Individual Diagnostics, Detailed output diagnostic data is accessible from the toolbox and can be latched/reset based on their health status.
How does the board handle terminal board connector monitoring?
Each connector has a unique ID chip containing board-specific details, checked by the I/O processor. A hardware incompatibility fault is triggered if a mismatch is detected, signaling potential connectivity or hardware issues.
