Today while tracking down a 4-20 mA loop problem i came across an input with 42 mA. The channel light for this input was flashing but the device connected to the loop seemed to be working properly. I should mention that this is a SLC 500
analog input card. The loop is powered by an old Ficher Porter unit that supplies the current and has calibration tags indicating that 42mA is correct for full output. My question is the light flashing because of the overrange current level or is the input damaged.
analog input card. The loop is powered by an old Ficher Porter unit that supplies the current and has calibration tags indicating that 42mA is correct for full output. My question is the light flashing because of the overrange current level or is the input damaged.