Is it a requirement in IEC to use surge-protection-device for digital and analogue pairs coming into DCS from the field? Will it be acceptable in IEC to use surge-protection-device only at 230V power distribution panel supplying power to DCS (and no surge-protection-device for 24V-dc-digital/4-20mA-analogue pairs?)
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Surge Protection
- Thread starter timm333
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230V power circuits are not A/D circuit pairs, and there are specific TVSS devices available for communication/signal circuits. You can draw your own conclusions.
Plus while you can ask IEC, the interpretation of their standards, they are not the enforcing agency, I would think.
Rafiq Bulsara
Plus while you can ask IEC, the interpretation of their standards, they are not the enforcing agency, I would think.
Rafiq Bulsara
I believe IEC/BS EN 62305 (Lightning Protection) Part 4 (Electronics Devices) might well require it. If you don't have access to 62305, Furse publishes a nice (and free) guide to 62305:
Catalogues&b=furse
Catalogues&b=furse
Didn't like the space in the URL... let's try that again:
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