GE IS200VAICH1DAA VME ANALOG I/O card
Description:
IS200VAICH1DAA is designed as GE Mark VI series VEM analog input/ourput card. The Analog Input/Output (VAIC) board accepts 20 analog inputs and controls 4 analog outputs. Each terminal board accepts 10 inputs and 2 outputs. Cables connect the terminal board to the VME rack where the VAIC processor board is located. VAIC converts the inputs to digital values and transfers them over the VME backplane to the VCMI board, and then to the controller. For outputs, the VAICconverts digital values to analog currents and drives these through the terminal board into the customer circuit.
VAIC supports both simplex and triple modular redundant (TMR) applications. When used in a TMR configuration, input signals on the terminal board are fanned out to three VME board racks R S, and T, each containing a VAIC. Output signalsare driven with a propretary circuit that creates the desired current using all three VAICs. In the event of a hardware failure, the bad VAIC is removed from the outputand the remaining two boards continue to produce the correct current. When used ina simplex configuration the terminal board provides input signals to a single VAICwhich provides all of the current for outputs.
The VAIC board accepts 20 analog inputs, controls 4 analog outputs, and containssignal conditioning, an analog MUX A/D converter, and D/A converter. The type ofanalog input, either voltage, 4-20 mA, or +1 mA, is selected by jumpers on theterminal board. Two of the four analog output circuits are 4-20 mA and the other twocan be configured for 4-20 mA or 0-200 mA Inputs and outputs have noisesuppression circuitry to protect against surge and high frequency noise.