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niba
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1#
电梯直达
 图1 图2
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fhongkai
1
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13#
I think PTC Fuse cannot be used for sure if you need to let the RS-485 Port survive from Such continual-High Voltage shock instead of ESD/Low Voltage Shock,etc.I think for 220/380V Voltage Level,at least TVS-GDT-Fast-acting fuse for two-level Protection... PTC Fuses Acts tooooooooo Slow compared with Fast-acting Fuse,I think,according to the Datasheet of LittelFuse..
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发表于2017-04-25 12:36:04
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