AO2 2500M/AO2/XXXXX/XXXXXX | Foxboro I/O MODULE

The analog input modules that support line fault detection are set to detect the line fault at 0.5 mA or lower input current so that they may be used with SCI set to 1 for applications where the input must be used below 4 mA. This ensures that a true open circuit line fault will be detected, yet still allows faultless operation down as low as 2.5% of the range. When the SCI is set to 3, the AIN or RIN input block will detect the low input level below -2% (3.92 mA) and the input will be marked BAD by the block.