lawry Posted February 25, 2014 Report Share Posted February 25, 2014 Hi, I am using a V130 T38 + 1 X EX D16A3TO16 + 1 X IO AI4 AO2, this system will be powered by a 24 V battery bank. In the specs sheet, it mentions operating voltage between 20.4 V to 28.8 V DC. What would happen if the voltage would go down to say 18 V. Will the PLC shut down on its own, or is there a precaution that i need to take? Thanks Lawry Quote Link to comment Share on other sites More sharing options...
MVP 2014 Simon Posted February 25, 2014 MVP 2014 Report Share Posted February 25, 2014 I would put a DC-DC convertor (24V in - 24V out) between the batteries and the PLC system. Check the specs of the convertor and try to ensure it has a fast cutoff on the output once the input voltage falls below the accepted minimum. The convertors usually accept a relatively wide input range and provide a regulated output at 24V. If you connect the PLC directly to the batteries, as the battery voltage sags below 20V it is highly likely to corrupt the RAM and/or flash memory on the PLC. We see it mostly when the PLCs are installed on vehicles, since the starter motor causes significant voltage drop when starting the engine. Quote Link to comment Share on other sites More sharing options...
lawry Posted February 26, 2014 Author Report Share Posted February 26, 2014 Thank you Simon. Quote Link to comment Share on other sites More sharing options...
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