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Which DO cards are better from the Reliability perspective? Cards that give 24 VDC or cards that give 110 VAC?
Kindly note that the PLC system will be powered from UPS 110VAC. Also, we would be using interposing relays as the final voltages required for field are going to be 110 VDC. OEM offers both these options. I understand these options matter when we do not use an interposing relay. In our case it should not be a problem so why not use lower level voltages which in my opinion are more reliable.
Kindly note that the PLC system will be powered from UPS 110VAC. Also, we would be using interposing relays as the final voltages required for field are going to be 110 VDC. OEM offers both these options. I understand these options matter when we do not use an interposing relay. In our case it should not be a problem so why not use lower level voltages which in my opinion are more reliable.