Yaic Operation; Analog Input Hardware - GE Mark VIeS System Manual

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4.1.3 YAIC Operation

The YAIC accepts input voltage signals from the terminal board for all 10 input channels. The analog input section consists of

an analog multiplexer block, several gain and scaling selections, and a 16-bit analog-to-digital converter (ADC).

Inputs 1–8 can be individually configured as ±5 V or ±10 V, or 4–20 mA scale signals, depending on the input configuration.

Inputs 9–10 can only be configured for ±1 mA or 4-20 mA. The terminal board provides a 250 Ω burden resistor when

configured for current inputs yielding a 5 V signal at 20 mA. These analog input signals are first passed through a passive,

low pass filter network with a pole at 75.15 Hz. Voltage signal feedbacks from the analog output circuits and calibration

voltages are also sensed by the YAIC analog input section.

GEH-6855_Vol_II

GEH-6855_Vol_II Mark VIeS Functional Safety Systems Volume II

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