SPECIFICATIONS
Part Number: IS200VAICH1A
Manufacturer: General Electric
Series: Mark VI
Product Type: Analog Input Board
Availability: In Stock
Product of Origin: U.S.A
Manual: GEH-6421J
IS200VAICH1A is an Analog Input Board manufactured and designed by General Electric as part of Mark VI used in gas turbine control systems. Twenty analog inputs and four analog outputs are controlled by the Analog Input Board (VAIC). Ten inputs and two outputs are accepted by each Analog Input terminal board. The terminal board is connected by cables to the VAIC processor board's VME rack. The inputs are converted to digital values by the VAIC before being sent from the VCMI board to the controller via the VME backplane. To monitor 20 inputs, the VAIC needs two terminal boards. The VAIC drives outputs through the terminal board and into the customer circuit by converting digital values to analog currents.
FUNCTIONAL DESCRIPTION
- Both simplex and triple modular redundant (TMR) applications are supported by the VAIC. When employed in a TMR configuration, the terminal board's input signals are spread out to three VME board racks, R, S, and T, each of which has a VAIC.
- A specialized circuit that drives output signals uses all three VAICs to provide the required current. In the event of hardware failure, the defective VAIC is taken out of the output while the two other boards continue to produce the proper current.
- A single VAIC receives input signals from the terminal board when it is utilized in a simplex arrangement. The output current is then entirely supplied by the single VAIC.
INSTALLATION
- Turn off the processor rack for the VME.
- Insert the VAIC board, then, using your hands, press the top and bottom levers into the seat of the edge connectors.
- Tighten the captive screws on the front panel's top and bottom.
OPERATION
- The VAIC board features signal conditioning, an analog MUX, an A/D converter, and a D/A converter in addition to 20 analog inputs, four analog outputs, and signal control.
- On the terminal board, a jumper is used to specify the kind of analog input: voltage, 4-20 mA, or 1 mA. Four analog output circuits-two of which are 4-20 mA can be set up using terminal board jumpers for 4-20 mA or 0-200 mA on the other two.
- To guard against surge and high-frequency noise, inputs and outputs incorporate noise suppression circuitry.
IS200VAICH1A COMPATIBILITY
- The VAIC board and accompanying terminal boards come in two generations. All VAIC versions up till and including VAICH1C are considered to be the original VAIC. This generation includes the VAICH1B gene. These boards can handle a load resistance of up to 500 at the end of 1000 feet of #18 wire when driving 20 mA outputs.
- For optimal operation, this generation of the board needs a terminal board TBAIH1B or earlier. Additionally, they are compatible with all DTAI terminal board revisions.
- In a TMR system, analog inputs from JR1, JS1, and JT1 fan out to the three control racks.
- All three VME racks supply the transducers with 24 V dc power, which is diode red on the terminal board. All three VAIC currents are routed into each analog output. A series resistor that feeds a voltage back to each I/O processor board measures the actual output current. The three currents' median value, as determined by voting, is the output.
IS200VAICH1A DIAGNOSTICS
Information about the status is displayed by three LEDs at the top of the VAIC front panel. A solid red indicates a failure, while a flashing green indicates a normal run. The third LED, which says STATUS and is typically off, turns steadily orange if the board has a diagnostic alert condition. Among the diagnostic tests are the following:
- Hardware limit checking for each analog input is based on predetermined (non-configurable) high and low levels that are set close to the limits of the operational range. A logic signal is set and the input is no longer examined if this limit is exceeded.
- The entire board generates a composite diagnostic warning called L3DIAG VAIC if any hardware limit on the input is reached. Information about each diagnosis is available from the toolbox. Individual diagnostic signals may be latched, and the RESET DIA signal may be used to reset them.
- System limit checking for each input is done using configurable high and low levels. These restrictions, which can be adjusted for enable/disablement and latching/non-latching, can be utilized to trigger alarms. The out-of-bounds are reset via RESET SYS.
- In TMR systems, a defect is triggered if one signal deviates from the median value the value that was voted on by more than a set amount. This may give an early warning that a problem is emerging in one channel.
- Check the 20/200 mA scaling relays, suicide relays, output currents, total current, and D/A outputs; these are tested for reasonability and can cause a problem.
- The VAIC board questions the TBAI terminal board's internal ID device. A read-only chip with the terminal board serial number, board type, revision number, and the location of the JR, JS, and JT connectors is where the board ID is encoded. A hardware incompatibility fault is triggered when the I/O processor reads the chip and encounters a mismatch.
Characteristics
- Number of channels: 24
- Input span: 4-20 mA, ±1 mA, ±5 V dc, ±10 V dc
- Input Impedance: 250 ohm at 4-20 mA
- Input converter resolution: 16-bit A/D converter
- Common mode voltage range: ±5 V
- Output converter: 12-bit D/A converter
- Output load: 500 ohm for 4-20 mA
- Temperature: 0 to 60 degrees Celcius
- Size: 26.04cm x1.99cm
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FREQUENTLY ASKED QUESTIONS
What is IS200VAICH1A?
IS200VAICH1A is an Analog Input Board developed by General Electric and used in gas turbine control systems.
What number of inputs and outputs can the Analog Input Board accept?
The terminal board supports 10 inputs and 2 outputs. 20 analog inputs and 4 analog outputs are controlled by the Analog Input Board.
How to Check Price and Availability of this Analog Input Board?
Please Contact World of Controls FZE for sales at +1 609 385 1231 or Request a Quote.
