Circuit Description SD39EAM-1r4
4-2 September 2005
Figure 4–1 EAM Block Diagram
4.2 Channel Circuitry
All 16 channels have identical circuitry. As shown in Figure 4-2, the circuitry for a single I/O channel
consists of the following principal components:
• An I/O ASIC
• An output FET (Field Effect Transistor)
• An opto-coupler
• A precision 250 ohm current sense resistor
• A DC-to-DC power rectifier and filter
• A communications pulse transformer
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