GE IS200ECTBG1ADE Exciter Contact Terminal Board

I. Product Overview

II. Technical Parameters

1. Electrical Parameters

• Power Supply Requirements: The input voltage is +5V DC (for digital circuits) and ±12V DC (for analog circuits), with an allowable voltage fluctuation range of ±5%; the maximum power consumption is ≤12W. It adopts a natural heat dissipation design (a small heat sink is integrated on the board surface), and the operating temperature is ≤55℃.

• Input Channel Parameters:

• Thermocouple Channels (8 channels): Supports K/J/T types, with a cold-junction compensation accuracy of ±0.5℃. The measurement range is -200℃~1300℃ (for K-type), and the input impedance is ≥10MΩ;

• RTD (Resistance Temperature Detector) Channels (8 channels): Supports PT100/Cu50, using a 3-wire measurement method. The measurement range is -200℃~850℃ (for PT100), and the measurement accuracy is ±0.1% FS;

• Standard Signal Channels (8 channels): Supports 4-20mA/0-10V. The input impedance is ≥100kΩ (for voltage signals)/≤250Ω (for current signals), and the conversion accuracy is ±0.05% FS;

• ADC Conversion Parameters: 16-bit resolution, sampling rate of 10-100Hz (configurable), conversion time ≤10ms, and input common-mode voltage range of ±10V.

• Anti-Interference Performance: Complies with the IEC 61000-6-2 industrial anti-interference standard. It has electrostatic discharge (ESD) protection of ±2kV (contact discharge)/±4kV (air discharge), electrical fast transient (EFT) protection of ±1kV (power port)/±0.5kV (signal port), and radio frequency radiation immunity of ≥10V/m (80-1000MHz).

2. Environmental Parameters

• Operating Temperature: -25℃~65℃, supporting wide-temperature operation and adapting to scenarios such as high-temperature workshops and outdoor control cabinets;

• Storage Temperature: -40℃~85℃, with no risk of component aging or pin corrosion during long-term storage;

• Humidity: 5%~95% (non-condensing). The board surface is coated with a moisture-proof insulating layer, allowing use in high-humidity and high-salt-spray coastal environments;

• Vibration Protection: Complies with the IEC 60068-2-6 standard, capable of withstanding sinusoidal vibration with a frequency of 10-500Hz and an acceleration of 5g; complies with the IEC 60068-2-27 standard, capable of withstanding an impact of 50g acceleration (11ms pulse), avoiding interface loosening and component damage caused by equipment operation vibration or transportation impact.

3. Physical and Interface Parameters

• Dimensions: 3U VME board form factor (100mm×233mm×22mm), compatible with standard 19-inch industrial control cabinet installation, and supporting hot swapping (requires Mark VIe system authorization);

• LED Indicators: 4 status lights (PWR: Power status, green; RUN: Operation status, green; ERR: Fault status, red; COMM: Communication status, yellow). The RUN light blinks to indicate signal acquisition and processing in progress, and the COMM light stays on to indicate normal backplane communication;

• Backplane Interface: 1 VME64x backplane interface, used for communication with control modules to transmit collected data and configuration commands, and supports interrupt requests (e.g., triggering an interrupt when a signal exceeds the limit);

• Input Interface: 24 Phoenix terminal interfaces (each channel corresponds to 1 signal input + 1 common terminal), supporting screw-fastened wiring, with a wire specification of 0.5-2.5mm².

III. Functional Features

1. Multi-Channel High-Precision Analog Signal Acquisition

• For thermocouple signals, the board has a built-in cold-junction compensation circuit with a compensation accuracy of ±0.5℃, ensuring a temperature measurement error of ≤±1℃;

• For RTD signals, a 3-wire measurement method is adopted to effectively offset the influence of lead resistance, achieving a measurement accuracy of ±0.1% FS;

• For 4-20mA/0-10V signals, weak signals are amplified 10-100 times by an instrumentation amplifier (such as AD8221), and then digitized by a 16-bit high-precision ADC converter (such as ADS1115) with a conversion accuracy of ±0.05% FS and a sampling rate of up to 100Hz, which can capture subtle changes in signals in real time (e.g., high-frequency fluctuations of vibration signals).

2. Multiple Signal Filtering and Anti-Interference

• At the hardware level, each signal input channel is connected in series with an RC low-pass filter circuit (the cutoff frequency can be set to 50Hz/60Hz via jumpers) to effectively suppress power frequency interference; it is also equipped with a signal isolation module (such as ISO1540) to achieve electrical isolation between the input signal and the internal circuit of the board (isolation voltage ≥2.5kVrms), preventing the impact of common-mode interference and ground loops;

• At the software level, a sliding window filtering algorithm is used to eliminate spike pulse interference, and a Kalman filtering algorithm is combined to smooth signal fluctuations (e.g., instantaneous jumps of pressure signals). After filtering, the signal-to-noise ratio is increased to more than 60dB, ensuring that the data uploaded to the control module truly reflects the actual state of the equipment and avoiding misjudgment of control logic caused by interference.

3. Signal Linearization and Calibration

4. Flexible Data Interaction and Status Monitoring