IS200VAICH1DAB - Analog Input/Output Board

SPECIFICATIONS:

Part Number: IS200VAICH1DAB
Manufacturer: General Electric
Series: Mark VI
Number of Channels: 24
Input Span: 4-20 mA
Input Impedance: 4-20 mA
Input Converter Resolution: 16-bit A/D Converter
Product Type: Analog Input/Output Board
Scan Time: 10 ms
Output Converter: 12-bit
Temperature Operating: 0 to 60°C
Memory: 128 MB of flash memory
Ethernet: 10BaseT/100BaseTX (RJ-45)
Microprocessor: Intel Celeron 300 MHz
Size: 26.04 cm high x 1.99 cm wide
Repair: 3-7 Day
Availability: In Stock
Country of Origin: United States
Manual: GEH-6421M

FUNCTIONAL DESCRIPTION:

IS200VAICH1DAB is an Analog Input/Output Board Manufactured and designed by General Electric as part of the Mark VI Series used in GE Speedtronic Gas Turbine Control Systems. The VAIC board processes 20 analog inputs and controls 4 analog outputs. Each terminal board handles 10 inputs and 2 outputs, with connections to the VAIC processor in the VME rack via cables. The VAIC converts analog inputs to digital signals, which are transmitted over the VME backplane to the VCMI board and then to the controller. For outputs, it converts digital signals to analog currents, delivered through the terminal board to the customer circuit. The VAIC operates in both simplex and triple modular redundant (TMR) configurations. In a TMR setup, input signals are shared among three VME racks (R, S, T), each with a VAIC, and output signals are managed by a proprietary circuit ensuring the correct current across all three VAICs. If one VAIC fails, it is isolated, and the other two continue to function. In a simplex configuration, inputs go to a single VAIC, which handles all output currents.

OPERATION:

The VAIC board handles 20 analog inputs and 4 analog outputs, featuring signal conditioning, an analog multiplexer, an A/D converter, and a D/A converter. Inputs can include voltage, 4-20 mA signals, or come from a terminal board. Of the 4 outputs, 2 are fixed at 4-20 mA, while the other 2 can be configured for either 4-20 mA or 0-200 mA. Both inputs and outputs have noise suppression circuits to protect against surges and high-frequency interference. In a TMR setup, the analog inputs are distributed across three control racks: JR1, JS1, and JT1. The 24 V DC power for transducers is provided by all three VME racks and is diode OR selected on the terminal board. Each analog current output is generated by the combined currents from all three VAIC boards, with the final output based on the median value of the three current measurements, determined by measuring the voltage across a series resistor.

WOC holds the largest inventory of OEM replacement parts for GE Speedtronic Gas Turbine Control Systems. In addition to providing new and refurbished boards with warranty coverage, we also offer repair services for faulty boards. Our expert team is available 24/7 to assist with your OEM needs and address any automation requirements. For information on pricing and availability for parts and repairs, please reach out to our team via phone or email.

FREQUENTLY ASKED QUESTIONS:

How does the board handle output signals in a TMR configuration?

In a TMR setup, each analog current output is driven by all three VAIC boards. The final output current is determined by taking the median (voted middle value) of the three current measurements, ensuring accuracy and reliability.

How many inputs and outputs does the board support?

The board typically supports 20 analog inputs and 4 analog outputs. The inputs can be voltage, 4-20 mA, or signals from a terminal board, while the outputs are divided into fixed 4-20 mA and configurable outputs (4-20 mA or 0-200 mA).

How can I check the pricing and availability of parts and repairs?

For detailed pricing and availability, please contact our team directly by phone or email, and we will provide the necessary information.