IS200MVRAH1A - I/O Interface Board

SPECIFICATIONS:

Part Number: IS200MVRAH1A
Manufacturer: General Electric
Series: Mark VIe
Product Type: I/O Interface Board
Communication Link: High-Speed Serial Link (HSSL)
Replaces: TCQA, IOMA
Thermocouple Inputs: Simplex
Supported I/O: Servos, LVDTs, Pulse Rates, Proximeters, Analog Inputs, Analog Outputs, PTR Relays
Additional Inputs: Bus Voltage, Generator Voltage, CPD, Megawatt
Data Transfer Rate to MVRA: 5 ms
Power Supply: MVRPH1A
External Data Network: IONet
Operating temperature: -30 to 65°C
Size: 33.0 cm high x 17.8 cm
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6800_Vol_II

FUNCTIONAL DESCRIPTION:

IS200MVRAH1A is an I/O Interface Board manufactured and designed by General Electric as part of the Mark VIe Series, which is used in GE Distributed Turbine Control Systems. The MVRAH1A is an I/O board on the PMVE using the high-speed serial link (HSSL). The PMVE contains specialised code for the MVRAH1A that communicates and controls the MVRAH1A analog and digital I/O. Configuration parameters customise MRVA operation. The MVRAH1A is a functional replacement for the Mark VIe TCQA and IOMA boards. MVRA analog and digital I/O is as follows:

• Thermocouples (Simplex)
• Servos and LVDTs
• Pulse Rates
• Proximeters
• Analog Inputs
• Analog Outputs
• PTR Relays
• Bus and Gen Voltage
• CPD and Megawatt

INSTALLATION:

• Verify that power is removed from the core: Ensure all power sources to the system are turned off and follow proper lockout/tagout procedures. Confirm with a multimeter that no residual voltage is present to prevent electrical shock or equipment damage.

• Carefully remove all ribbon and power cables from the board connectors: Label and gently disconnect all cables at the connectors, avoiding pulling on the wires. Organise them to prevent tangling or damage.

• Holding the board in place, press up the three top and three bottom tabs: Support the board while pressing the top and bottom retention tabs to release it. Make sure all tabs are fully disengaged before lifting to avoid bending or breaking the board.

• Remove the old board and place it in a static bag: Lift the board carefully by its edges and place it in an anti-static bag to protect against electrostatic discharge. Store it safely for reuse or return.

• Remove the new MVRA from its static bag and reverse this procedure: Handle the new board by its edges, insert it into the slot, and ensure proper alignment with connectors. Press the retention tabs until the board is securely in place.

• Once the MVRA is in place, connect the HSSL link cable from the PMVE: Attach the HSSL link cable to the MVRA port securely, ensuring there is no strain on the cable or connector. Verify that all other previously disconnected cables are also reconnected properly.

• Use the ToolboxST application to configure the MVRx as needed: Launch ToolboxST on a connected workstation to configure the new board. Set parameters, update firmware if required, and verify communication with the system before returning it to service.

OPERATION:

The PMVE contains configuration parameters specific to the MVRA. External data is transferred to and from the control system database in the controller over the IONets. The PMVE propagates the control and data to each of its I/O boards. Data is transferred to the MVRA across the HSSL every five milliseconds. Through internal ribbon cables, other interface boards supply additional input and output as follows:

• Bus/Gen PT
• Sync frequency and phase
• Relay control
• Megawatt and CPD input
• Power supply monitoring
• Power to this board is supplied by an MVRPH1A power supply

SYNC CHECK I/O MODULE:

The MVRA functions much like the TCQA and includes sync check functionality. The MVRA writes the control limits and enables the sync check logic in the FPGA. The FPGA controls the relay enable permissive when all conditions are satisfied. The MVRA uses a time-based algorithm, which improves speed and acceleration. This algorithm collects the number of tooth pulses and 25MHz tics that occurred between those pulses within a specified time interval.

The MVRA uses an enhanced speed algorithm (ESA) for speed wheels and gear tooth pulse rate sensors. Variability in the gear tooth wheel spacing causes variability in the speed measurement and acceleration. The ESA measures and corrects this spacing. However, it does not introduce latencies or correct for electronic or sensor abnormalities. If the ESA cannot correct for the speed anomalies, it defaults to the evenly spaced algorithm. The ESA should not be used for critical overspeed functions. The only requirement for this mapping to occur is to enable the ESA and set the teeth per revolution to the correct value. This can be used for any pulse device that has multiple pulses generated per revolution, but it must be an integer number. With a multi-gear box, the ESA is only required to know the number of gear teeth on the sense gear. The scaling can accommodate the gearing ratios.

RECALIBRATION:

The recalibration of a PSVO, PSVP, or PCAA servo is required when a new terminal board is used on a system. The controller saves the barcode of the terminal board and compares it against the current terminal board during reconfiguration load time. Any time a recalibration is saved, it updates the barcode name to the current board.

WOC maintains the largest inventory of OEM replacement parts for GE Distributed Turbine Control Systems, providing immediate access to critical components. Our stock includes unused parts, refurbished boards, and specialised components, all curated to meet stringent quality standards. In addition to supplying parts, we offer expert repair and refurbishment services for malfunctioning boards, with every unit backed by a warranty to ensure reliability and long-term performance.

Our team of experienced professionals is available 24/7 to support OEM requirements and maintain seamless operation of your automation systems. We provide guidance on part selection, troubleshooting, and repair solutions, delivering responsive and knowledgeable assistance. For detailed information on pricing, availability, or specific service requests, please contact our team via phone or email for prompt, personalised support tailored to your operational needs.

FREQUENTLY ASKED QUESTIONS:

What is the IS200MVRAH1A?

The IS200MVRAH1A is an I/O Interface Board used in GE’s Mark VIe Distributed Control System. It manages a wide range of analog and digital signals and communicates through a high-speed serial link. The board works closely with the PMVE processor to process and control field I/O reliably.

What types of I/O does the MVRA support?

It supports thermocouples, servos, LVDTs, proximeters, pulse rate sensors, analog inputs, analog outputs, and PTR relays. The board also handles bus and generator voltage inputs, as well as CPD and megawatt signals. This broad coverage makes it a central component for turbine instrumentation.

How does the MVRA communicate with the system?

The MVRA communicates with its host PMVE via a high-speed serial link (HSSL). Data is exchanged every 5 ms to ensure timely control actions. System-level data moves through the IONet to the controller for processing and coordination.