I/O modules

The GE IS200VAICH1D IS200VAICH1DAA Analog Input VME Board provides high-precision analog measurement for Mark VIe systems. This VME board accepts voltage and current signals from field transmitters. You will find it in gas turbine and steam turbine control applications. It delivers 16-bit resolution for accurate monitoring of pressure and flow. Therefore, this unit ensures precise process control for power generation.

The GE IS200VAICH1D IS200VAICH1DAA Analog Input VME Board measures 233 mm in height and 160 mm in width. Its depth reaches 40 mm for VME chassis mounting. The unit weighs approximately 0.65 kilograms. It contains one 16-bit ADC and sixteen analog input channels. Four isolation amplifiers protect the controller circuits. Additionally, you get sixteen status LEDs for channel diagnostics.

Key Technical Specifications

Internal Architecture and Energy Storage

The GE IS200VAICH1D IS200VAICH1DAA Analog Input VME Board stores minimal energy in its power filter. Small electrolytic capacitors hold approximately 350 microfarads total capacitance. A 16-bit successive approximation ADC converts each analog value with high precision. This ADC provides 65,536 discrete steps across the input range. Four isolation amplifiers separate the field signals from the logic circuits. A programmable gain amplifier adjusts input sensitivity for each channel. The board includes a precision voltage reference at 5.000 VDC. An analog multiplexer routes each channel to the ADC input sequentially. Sixteen green LEDs show active channel status clearly.

Connection Interfaces and Wiring Details

You will find a 50-pin front panel connector for field wiring. Connect this to a termination board for analog sensor inputs. The GE IS200VAICH1D IS200VAICH1DAA Analog Input VME Board also uses VME P1 and P2 backplane connectors. Use shielded twisted-pair cable for all analog signal connections. Connect the positive signal wire to the channel + terminal. Connect the negative return wire to the channel – terminal. Sixteen green LEDs light up when their respective channel receives a valid signal. A green PWR LED lights up when the board receives 5 VDC. A yellow COM LED flashes during data exchange with the controller.

Configuration and Installation Steps

You slide this VME board into a standard 6U VME chassis. First, align the board with the upper and lower card guides. Then, push it firmly until the backplane connectors seat completely. Use the injector/ejector handles to seat the board properly. The GE IS200VAICH1D IS200VAICH1DAA Analog Input VME Board requires 5 VDC from the VME backplane. Use the Toolbox software to configure each analog channel. Select the input range (±10 V, 0-10 V, or 4-20 mA) for each channel. Set the scaling parameters to convert ADC counts to engineering units. Configure the averaging filter for noisy signal environments. Download the configuration to the board’s flash memory. Verify each channel with a precision signal calibrator before turbine startup.

Details